diff --git a/RELEASE.txt b/RELEASE.txt
index ff623ecca..9327b5496 100755
--- a/RELEASE.txt
+++ b/RELEASE.txt
@@ -1,4 +1,4 @@
-SLS Detector Package 5.2.0 released on 15.07.2021 (Minor Release)
+SLS Detector Package 5.2.0 released on 28.07.2021 (Minor Release)
 ===================================================================
 
 This document describes the differences between 5.2.0 and 5.1.0 releases.   
@@ -27,6 +27,10 @@ This document describes the differences between 5.2.0 and 5.1.0 releases.
         Command: vetostream, Detector::setVetoStream
         
 
+    2.  (Gotthard2) veto algorithm
+        New command to set veto algorithm for 2.5GbE or 10GbE (debugging). 
+        Command: vetoalg, Detector::setVetoAlgorithm
+
     Gotthard2 server
     ----------------
 
@@ -37,18 +41,6 @@ This document describes the differences between 5.2.0 and 5.1.0 releases.
 2. Resolved Issues
 ==================
 
-
-    Receiver
-    --------
-
-    1.  
-
-
-    Client
-    ------
-
-    1.  
-
     Gotthard2 Server
     ----------------
 
diff --git a/python/scripts/generate_enums.py b/python/scripts/generate_enums.py
index 7abb7cfc1..25769e429 100644
--- a/python/scripts/generate_enums.py
+++ b/python/scripts/generate_enums.py
@@ -11,7 +11,7 @@ import subprocess
 
 from parse import remove_comments
 
-allow_bitwise_op = ["EthernetInterface"]
+allow_bitwise_op = ["ethernetInterface"]
 
 op_key = {"operator|": "__or__", 
           "operator&" : "__and__"}
@@ -22,7 +22,7 @@ def single_line_enum(line):
 
 def extract_enums(lines):
 
-    # deal with enum class EthernetInterface : int32_t
+    # deal with enum class ethernetInterface : int32_t
     # and normal enum burstMode {
 
     line_iter = iter(lines)
@@ -89,7 +89,7 @@ def generate_enum_string(enums):
 
         #Here add the operators 
         for op in operators:
-            data.append(f"\n\t.def(\"{op_key[op]}\", py::overload_cast< const slsDetectorDefs::EthernetInterface&,  const slsDetectorDefs::EthernetInterface&>(&{op}))")
+            data.append(f"\n\t.def(\"{op_key[op]}\", py::overload_cast< const slsDetectorDefs::ethernetInterface&,  const slsDetectorDefs::ethernetInterface&>(&{op}))")
 
 
         data.append(';\n\n')
diff --git a/python/slsdet/detector.py b/python/slsdet/detector.py
index 689c49911..919e9c86f 100755
--- a/python/slsdet/detector.py
+++ b/python/slsdet/detector.py
@@ -7,6 +7,7 @@ timingMode = slsDetectorDefs.timingMode
 speedLevel = slsDetectorDefs.speedLevel
 dacIndex = slsDetectorDefs.dacIndex
 detectorType = slsDetectorDefs.detectorType
+ethernetInterface = slsDetectorDefs.ethernetInterface
 
 from .utils import element_if_equal, all_equal, get_set_bits, list_to_bitmask
 from .utils import Geometry, to_geo, element, reduce_time, is_iterable
@@ -2335,6 +2336,13 @@ class Detector(CppDetectorApi):
     @property
     @element
     def vetostream(self):
+        """[Gotthard2] Enabling/ disabling veto interface
+        Note
+        ----
+        Default: both off
+        Options: NONE, I3GBE, 10GBE (debugging)
+        Debugging interface also enables second interface in receiver (separate file), which also restarts zmq streaming if enabled.
+        """
         return self.getVetoStream()
 
     @vetostream.setter
@@ -2343,6 +2351,25 @@ class Detector(CppDetectorApi):
             args = (args,)
         ut.set_using_dict(self.setVetoStream, *args)
 
+    @property
+    def vetoalg(self):
+        """[Gotthard2] Algorithm used for veto
+        Example
+        ----------
+        >>> d.vetoalg = defs.DEFAULT_ALGORITHM, defs.I10GBE
+        """
+        result = {}
+        interface = [ethernetInterface.I3GBE, ethernetInterface.I10GBE]
+        for eth in interface:
+            result[eth] = element_if_equal(self.getVetoAlgorithm(eth))
+        return result
+
+
+    @vetoalg.setter
+    def vetoalg(self, args):
+        if not isinstance(args, tuple):
+            args = (args,)
+        ut.set_using_dict(self.setVetoAlgorithm, *args)
 
     """
     Mythen3 specific
diff --git a/python/src/detector.cpp b/python/src/detector.cpp
index 6ebae6255..e4762d7a4 100644
--- a/python/src/detector.cpp
+++ b/python/src/detector.cpp
@@ -1075,15 +1075,26 @@ void init_det(py::module &m) {
                  Detector::setVeto,
              py::arg(), py::arg() = Positions{})
         .def("getVetoStream",
-             (Result<defs::EthernetInterface>(Detector::*)(sls::Positions)
+             (Result<defs::ethernetInterface>(Detector::*)(sls::Positions)
                   const) &
                  Detector::getVetoStream,
              py::arg() = Positions{})
         .def("setVetoStream",
-             (void (Detector::*)(const defs::EthernetInterface,
+             (void (Detector::*)(const defs::ethernetInterface,
                                  sls::Positions)) &
                  Detector::setVetoStream,
              py::arg(), py::arg() = Positions{})
+        .def("getVetoAlgorithm",
+             (Result<defs::vetoAlgorithm>(Detector::*)(
+                 const defs::ethernetInterface, sls::Positions) const) &
+                 Detector::getVetoAlgorithm,
+             py::arg(), py::arg() = Positions{})
+        .def("setVetoAlgorithm",
+             (void (Detector::*)(const defs::vetoAlgorithm,
+                                 const defs::ethernetInterface,
+                                 sls::Positions)) &
+                 Detector::setVetoAlgorithm,
+             py::arg(), py::arg(), py::arg() = Positions{})
         .def("getADCConfiguration",
              (Result<int>(Detector::*)(const int, const int, sls::Positions)
                   const) &
diff --git a/python/src/enums.cpp b/python/src/enums.cpp
index 7e2093224..23278cd5d 100644
--- a/python/src/enums.cpp
+++ b/python/src/enums.cpp
@@ -278,19 +278,24 @@ void init_enums(py::module &m) {
                slsDetectorDefs::timingSourceType::TIMING_EXTERNAL)
         .export_values();
 
-    py::enum_<slsDetectorDefs::EthernetInterface>(Defs, "EthernetInterface",
+    py::enum_<slsDetectorDefs::ethernetInterface>(Defs, "ethernetInterface",
                                                   py::arithmetic())
-        .value("NONE", slsDetectorDefs::EthernetInterface::NONE)
-        .value("I3GBE", slsDetectorDefs::EthernetInterface::I3GBE)
-        .value("I10GBE", slsDetectorDefs::EthernetInterface::I10GBE)
-        .value("ALL", slsDetectorDefs::EthernetInterface::ALL)
+        .value("NONE", slsDetectorDefs::ethernetInterface::NONE)
+        .value("I3GBE", slsDetectorDefs::ethernetInterface::I3GBE)
+        .value("I10GBE", slsDetectorDefs::ethernetInterface::I10GBE)
+        .value("ALL", slsDetectorDefs::ethernetInterface::ALL)
         .export_values()
         .def("__or__",
-             py::overload_cast<const slsDetectorDefs::EthernetInterface &,
-                               const slsDetectorDefs::EthernetInterface &>(
+             py::overload_cast<const slsDetectorDefs::ethernetInterface &,
+                               const slsDetectorDefs::ethernetInterface &>(
                  &operator|))
         .def("__and__",
-             py::overload_cast<const slsDetectorDefs::EthernetInterface &,
-                               const slsDetectorDefs::EthernetInterface &>(
+             py::overload_cast<const slsDetectorDefs::ethernetInterface &,
+                               const slsDetectorDefs::ethernetInterface &>(
                  &operator&));
+
+    py::enum_<slsDetectorDefs::vetoAlgorithm>(Defs, "vetoAlgorithm")
+        .value("DEFAULT_ALGORITHM",
+               slsDetectorDefs::vetoAlgorithm::DEFAULT_ALGORITHM)
+        .export_values();
 }
diff --git a/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h b/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h
index 8f9204c3b..1d1274e5f 100644
--- a/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h
+++ b/slsDetectorServers/gotthard2DetectorServer/RegisterDefs.h
@@ -90,8 +90,14 @@
 
 #define CONFIG_VETO_ENBL_OFST               (0)
 #define CONFIG_VETO_ENBL_MSK                (0x00000001 << CONFIG_VETO_ENBL_OFST)
+#define CONFIG_VETO_CH_3GB_ALG_OFST         (8)
+#define CONFIG_VETO_CH_3GB_ALG_MSK          (0x00000007 << CONFIG_VETO_CH_3GB_ALG_OFST)
+#define CONFIG_VETO_CH_3GB_ALG_DEFAULT_VAL  ((0x0 << CONFIG_VETO_CH_3GB_ALG_OFST) & CONFIG_VETO_CH_3GB_ALG_MSK)
 #define CONFIG_VETO_CH_3GB_ENBL_OFST        (11)
 #define CONFIG_VETO_CH_3GB_ENBL_MSK         (0x00000001 << CONFIG_VETO_CH_3GB_ENBL_OFST)
+#define CONFIG_VETO_CH_10GB_ALG_OFST        (12)
+#define CONFIG_VETO_CH_10GB_ALG_MSK         (0x00000007 << CONFIG_VETO_CH_10GB_ALG_OFST)
+#define CONFIG_VETO_CH_10GB_ALG_DEFAULT_VAL ((0x0 << CONFIG_VETO_CH_10GB_ALG_OFST) & CONFIG_VETO_CH_10GB_ALG_MSK)
 #define CONFIG_VETO_CH_10GB_ENBL_OFST       (15)
 #define CONFIG_VETO_CH_10GB_ENBL_MSK        (0x00000001 << CONFIG_VETO_CH_10GB_ENBL_OFST)
 
diff --git a/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer b/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer
index 481670565..52e4823a2 100755
Binary files a/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer and b/slsDetectorServers/gotthard2DetectorServer/bin/gotthard2DetectorServer_developer differ
diff --git a/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
index 2ecc00439..e09a53146 100644
--- a/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/gotthard2DetectorServer/slsDetectorFunctionList.c
@@ -2595,6 +2595,36 @@ int getVetoStream() {
     return ((bus_r(CONFIG_REG) & CONFIG_VETO_CH_3GB_ENBL_MSK) ? 1 : 0);
 }
 
+enum vetoAlgorithm getVetoAlgorithm(enum ethernetInterface interface) {
+    // 3gbe
+    if (interface == I3GBE) {
+        int retval = ((bus_r(CONFIG_REG) & CONFIG_VETO_CH_3GB_ALG_MSK) >>
+                      CONFIG_VETO_CH_3GB_ALG_OFST);
+        switch (retval) {
+            // more to follow
+        case CONFIG_VETO_CH_3GB_ALG_DEFAULT_VAL:
+            return DEFAULT_ALGORITHM;
+        default:
+            LOG(logERROR, ("unknown algorithm %d for 3gbe\n", retval));
+            return -1;
+        }
+    }
+    // 10gbe
+    int retval = ((bus_r(CONFIG_REG) & CONFIG_VETO_CH_10GB_ALG_MSK) >>
+                  CONFIG_VETO_CH_10GB_ALG_OFST);
+    switch (retval) {
+        // more to follow
+    case CONFIG_VETO_CH_10GB_ALG_DEFAULT_VAL:
+        return DEFAULT_ALGORITHM;
+    default:
+        LOG(logERROR, ("unknown algorithm %d for 3gbe\n", retval));
+        return -1;
+    }
+}
+
+void setVetoAlgorithm(enum ethernetInterface interface,
+                      enum vetoAlgorithm alg) {}
+
 void setBadChannels(int nch, int *channels) {
     LOG(logINFO, ("Setting %d bad channels\n", nch));
 
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
index 72401feed..58090a24d 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorFunctionList.h
@@ -542,6 +542,8 @@ void setVeto(int enable);
 int getVeto();
 void setVetoStream(int value);
 int getVetoStream();
+enum vetoAlgorithm getVetoAlgorithm(enum ethernetInterface interface);
+void setVetoAlgorithm(enum ethernetInterface interface, enum vetoAlgorithm alg);
 void setBadChannels(int nch, int *channels);
 int *getBadChannels(int *nch);
 #endif
diff --git a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
index 36a8c96b7..5cea24d8b 100644
--- a/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
+++ b/slsDetectorServers/slsDetectorServer/include/slsDetectorServer_funcs.h
@@ -248,4 +248,6 @@ int load_default_pattern(int);
 int get_all_threshold_energy(int);
 int get_master(int);
 int get_veto_stream(int);
-int set_veto_stream(int);
\ No newline at end of file
+int set_veto_stream(int);
+int get_veto_algorithm(int);
+int set_veto_algorithm(int);
\ No newline at end of file
diff --git a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
index 07abf900b..083bee508 100644
--- a/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
+++ b/slsDetectorServers/slsDetectorServer/src/slsDetectorServer_funcs.c
@@ -371,6 +371,8 @@ void function_table() {
     flist[F_GET_MASTER] = &get_master;
     flist[F_GET_VETO_STREAM] = &get_veto_stream;
     flist[F_SET_VETO_STREAM] = &set_veto_stream;
+    flist[F_GET_VETO_ALGORITHM] = &get_veto_algorithm;
+    flist[F_SET_VETO_ALGORITHM] = &set_veto_algorithm;
 
     // check
     if (NUM_DET_FUNCTIONS >= RECEIVER_ENUM_START) {
@@ -8412,7 +8414,7 @@ int get_master(int file_des){
 int get_veto_stream(int file_des) {
     ret = OK;
     memset(mess, 0, sizeof(mess));
-    enum EthernetInterface retval = NONE;
+    enum ethernetInterface retval = NONE;
 
     LOG(logDEBUG1, ("Getting veto stream\n"));
 
@@ -8429,7 +8431,7 @@ int get_veto_stream(int file_des) {
 int set_veto_stream(int file_des) {
     ret = OK;
     memset(mess, 0, sizeof(mess));
-    enum EthernetInterface arg = 0;
+    enum ethernetInterface arg = 0;
 
     if (receiveData(file_des, &arg, sizeof(arg), INT32) < 0)
         return printSocketReadError();
@@ -8456,4 +8458,71 @@ int set_veto_stream(int file_des) {
     }
 #endif
     return Server_SendResult(file_des, INT32, NULL, 0);
+}
+
+int get_veto_algorithm(int file_des) {
+    ret = OK;
+    memset(mess, 0, sizeof(mess));
+    enum ethernetInterface arg = NONE;
+    enum vetoAlgorithm retval = DEFAULT_ALGORITHM;
+    if (receiveData(file_des, &arg, sizeof(arg), INT32) < 0)
+        return printSocketReadError();
+
+    LOG(logDEBUG1, ("Getting veto algorithm for interface %d\n", arg));
+
+#ifndef GOTTHARD2D
+    functionNotImplemented();
+#else
+    // get only
+    if (arg != I3GBE && arg != I10GBE) {
+        ret = FAIL;
+        sprintf(mess, "Could not get vetoalgorithm. Invalid interface %d.\n",
+                arg);
+        LOG(logERROR, (mess));
+    } else {
+        retval = getVetoAlgorithm(arg);
+        LOG(logDEBUG1, ("vetoalgorithm retval: %u\n", retval));
+    }
+#endif
+    return Server_SendResult(file_des, INT32, &retval, sizeof(retval));
+}
+
+int set_veto_algorithm(int file_des) {
+    ret = OK;
+    memset(mess, 0, sizeof(mess));
+    int args[2] = {-1, -1};
+    if (receiveData(file_des, args, sizeof(args), INT32) < 0)
+        return printSocketReadError();
+
+    enum vetoAlgorithm alg = args[0];
+    enum ethernetInterface interface = args[1];
+    LOG(logINFO, ("Setting vetoalgorithm (interface: %d): %u\n", (int)interface,
+                  (int)alg));
+
+#ifndef GOTTHARD2D
+    functionNotImplemented();
+#else
+    // only set
+    if (Server_VerifyLock() == OK) {
+        if (interface != I3GBE && interface != I10GBE) {
+            ret = FAIL;
+            sprintf(mess,
+                    "Could not set vetoalgorithm. Invalid interface %d.\n",
+                    interface);
+            LOG(logERROR, (mess));
+        } else if (alg != DEFAULT_ALGORITHM) {
+            ret = FAIL;
+            sprintf(mess,
+                    "Could not set vetoalgorithm. Invalid algorithm %d.\n",
+                    alg);
+            LOG(logERROR, (mess));
+        } else {
+            setVetoAlgorithm(alg, interface);
+            int retval = getVetoAlgorithm(interface);
+            LOG(logDEBUG1, ("vetoalgorithm retval: %u\n", retval));
+            validate(alg, retval, "set veto algorithm", DEC);
+        }
+    }
+#endif
+    return Server_SendResult(file_des, INT32, NULL, 0);
 }
\ No newline at end of file
diff --git a/slsDetectorSoftware/include/sls/Detector.h b/slsDetectorSoftware/include/sls/Detector.h
index 1c582085e..c05ac6d04 100644
--- a/slsDetectorSoftware/include/sls/Detector.h
+++ b/slsDetectorSoftware/include/sls/Detector.h
@@ -1248,7 +1248,7 @@ class Detector {
     void setVeto(const bool enable, Positions pos = {});
 
     /** [Gotthard2] */
-    Result<defs::EthernetInterface> getVetoStream(Positions pos = {}) const;
+    Result<defs::ethernetInterface> getVetoStream(Positions pos = {}) const;
 
     /** [Gotthard2] Options: NONE (Default), I3GBE, I10GBE (debugging), ALL
      * Enable or disable the 2 veto streaming interfaces available. Can
@@ -1257,7 +1257,18 @@ class Detector {
      * interface in receiver for listening to veto packets (writes a separate
      * file if writing enabled). Also restarts client and receiver zmq sockets
      * if zmq streaming enabled.*/
-    void setVetoStream(const defs::EthernetInterface value, Positions pos = {});
+    void setVetoStream(const defs::ethernetInterface value, Positions pos = {});
+
+    /** [Gotthard2] */
+    Result<defs::vetoAlgorithm>
+    getVetoAlgorithm(const defs::ethernetInterface value,
+                     Positions pos = {}) const;
+
+    /** [Gotthard2] Options(vetoAlgorithm): DEFAULT_ALGORITHM.
+     * Options(ethernetInterface): I3GBE, I10GBE */
+    void setVetoAlgorithm(const defs::vetoAlgorithm alg,
+                          const defs::ethernetInterface value,
+                          Positions pos = {});
 
     /** [Gotthard2] */
     Result<int> getADCConfiguration(const int chipIndex, const int adcIndex,
diff --git a/slsDetectorSoftware/src/CmdProxy.cpp b/slsDetectorSoftware/src/CmdProxy.cpp
index 34dcc73db..f44885396 100644
--- a/slsDetectorSoftware/src/CmdProxy.cpp
+++ b/slsDetectorSoftware/src/CmdProxy.cpp
@@ -1825,18 +1825,18 @@ std::string CmdProxy::VetoStreaming(int action) {
         if (args.empty()) {
             WrongNumberOfParameters(1);
         }
-        defs::EthernetInterface interface = defs::EthernetInterface::NONE;
+        defs::ethernetInterface interface = defs::ethernetInterface::NONE;
         for (const auto &arg : args) {
             if (arg == "none") {
                 if (args.size() > 1) {
                     throw sls::RuntimeError(
-                        "cannot have other arguments with 'none'. args: " +
+                        std::string(
+                            "cannot have other arguments with 'none'. args: ") +
                         ToString(args));
                 }
                 break;
             }
-            StringTo<defs::EthernetInterface>(arg);
-            interface = interface | (StringTo<defs::EthernetInterface>(arg));
+            interface = interface | (StringTo<defs::ethernetInterface>(arg));
         }
         det->setVetoStream(interface, std::vector<int>{det_id});
         os << ToString(interface) << '\n';
@@ -1846,6 +1846,44 @@ std::string CmdProxy::VetoStreaming(int action) {
     return os.str();
 }
 
+std::string CmdProxy::VetoAlgorithm(int action) {
+    std::ostringstream os;
+    os << cmd << ' ';
+    if (action == defs::HELP_ACTION) {
+        os << "[default] [3gbe|10gbe]\n\t[Gotthard2] Set the veto "
+              "algorithm."
+           << '\n';
+    } else if (action == defs::GET_ACTION) {
+        if (args.size() != 1) {
+            WrongNumberOfParameters(1);
+        }
+        defs::ethernetInterface interface =
+            StringTo<defs::ethernetInterface>(args[0]);
+        if (interface == defs::ethernetInterface::NONE) {
+            throw sls::RuntimeError(
+                "Must specify an interface to set algorithm");
+        }
+        auto t = det->getVetoAlgorithm(interface, std::vector<int>{det_id});
+        os << OutString(t) << ' ' << ToString(interface) << '\n';
+    } else if (action == defs::PUT_ACTION) {
+        if (args.size() != 2) {
+            WrongNumberOfParameters(2);
+        }
+        defs::vetoAlgorithm alg = StringTo<defs::vetoAlgorithm>(args[0]);
+        defs::ethernetInterface interface =
+            StringTo<defs::ethernetInterface>(args[1]);
+        if (interface == defs::ethernetInterface::NONE) {
+            throw sls::RuntimeError(
+                "Must specify an interface to set algorithm");
+        }
+        det->setVetoAlgorithm(alg, interface, std::vector<int>{det_id});
+        os << ToString(alg) << ' ' << ToString(interface) << '\n';
+    } else {
+        throw sls::RuntimeError("Unknown action");
+    }
+    return os.str();
+}
+
 std::string CmdProxy::ConfigureADC(int action) {
     std::ostringstream os;
     os << cmd << ' ';
diff --git a/slsDetectorSoftware/src/CmdProxy.h b/slsDetectorSoftware/src/CmdProxy.h
index 6af69775d..9c33f2775 100644
--- a/slsDetectorSoftware/src/CmdProxy.h
+++ b/slsDetectorSoftware/src/CmdProxy.h
@@ -958,6 +958,7 @@ class CmdProxy {
         {"timingsource", &CmdProxy::timingsource},
         {"veto", &CmdProxy::veto},
         {"vetostream", &CmdProxy::VetoStreaming},
+        {"vetoalg", &CmdProxy::VetoAlgorithm},
         {"confadc", &CmdProxy::ConfigureADC},
         {"badchannels", &CmdProxy::BadChannels},
 
@@ -1134,6 +1135,7 @@ class CmdProxy {
     std::string VetoFile(int action);
     std::string BurstMode(int action);
     std::string VetoStreaming(int action);
+    std::string VetoAlgorithm(int action);
     std::string ConfigureADC(int action);
     std::string BadChannels(int action);
     /* Mythen3 Specific */
diff --git a/slsDetectorSoftware/src/Detector.cpp b/slsDetectorSoftware/src/Detector.cpp
index 0106f2f1c..1a6bd84fc 100644
--- a/slsDetectorSoftware/src/Detector.cpp
+++ b/slsDetectorSoftware/src/Detector.cpp
@@ -1565,36 +1565,52 @@ void Detector::setVeto(bool enable, Positions pos) {
     pimpl->Parallel(&Module::setVeto, pos, enable);
 }
 
-Result<defs::EthernetInterface> Detector::getVetoStream(Positions pos) const {
+Result<defs::ethernetInterface> Detector::getVetoStream(Positions pos) const {
     // 3gbe
     auto r3 = pimpl->Parallel(&Module::getVetoStream, pos);
     // 10gbe (debugging interface) opens 2nd udp interface in receiver
     auto r10 = getNumberofUDPInterfaces_(pos);
 
-    Result<defs::EthernetInterface> res(r3.size());
+    Result<defs::ethernetInterface> res(r3.size());
     for (unsigned int i = 0; i < res.size(); ++i) {
-        res[i] = (r3[i] ? defs::EthernetInterface::I3GBE
-                        : defs::EthernetInterface::NONE);
+        res[i] = (r3[i] ? defs::ethernetInterface::I3GBE
+                        : defs::ethernetInterface::NONE);
         if (r10[i] == 2) {
-            res[i] = res[i] | defs::EthernetInterface::I10GBE;
+            res[i] = res[i] | defs::ethernetInterface::I10GBE;
         }
     }
     return res;
 }
 
-void Detector::setVetoStream(defs::EthernetInterface interface, Positions pos) {
+void Detector::setVetoStream(defs::ethernetInterface interface, Positions pos) {
     // 3gbe
-    bool i3gbe = (interface & defs::EthernetInterface::I3GBE) == defs::EthernetInterface::I3GBE;
+    bool i3gbe = (interface & defs::ethernetInterface::I3GBE) ==
+                 defs::ethernetInterface::I3GBE;
     pimpl->Parallel(&Module::setVetoStream, pos, i3gbe);
 
     // 10gbe (debugging interface) opens 2nd udp interface in receiver
     int old_numinterfaces = getNumberofUDPInterfaces_(pos).tsquash(
         "retrieved inconsistent number of udp interfaces");
-    int numinterfaces = ((interface & defs::EthernetInterface::I10GBE) == defs::EthernetInterface::I3GBE) ? 2 : 1;
+    int numinterfaces = ((interface & defs::ethernetInterface::I10GBE) ==
+                         defs::ethernetInterface::I3GBE)
+                            ? 2
+                            : 1;
     if (numinterfaces != old_numinterfaces) {
         setNumberofUDPInterfaces_(numinterfaces, pos);
     }
-  }
+}
+
+Result<defs::vetoAlgorithm>
+Detector::getVetoAlgorithm(const defs::ethernetInterface interface,
+                           Positions pos) const {
+    return pimpl->Parallel(&Module::getVetoAlgorithm, pos, interface);
+}
+
+void Detector::setVetoAlgorithm(const defs::vetoAlgorithm alg,
+                                defs::ethernetInterface interface,
+                                Positions pos) {
+    pimpl->Parallel(&Module::setVetoAlgorithm, pos, alg, interface);
+}
 
 Result<int> Detector::getADCConfiguration(const int chipIndex,
                                           const int adcIndex,
diff --git a/slsDetectorSoftware/src/Module.cpp b/slsDetectorSoftware/src/Module.cpp
index c93fca57b..2221092c3 100644
--- a/slsDetectorSoftware/src/Module.cpp
+++ b/slsDetectorSoftware/src/Module.cpp
@@ -1878,6 +1878,19 @@ void Module::setVetoStream(const bool value) {
     sendToDetector(F_SET_VETO_STREAM, static_cast<int>(value), nullptr);
 }
 
+slsDetectorDefs::vetoAlgorithm Module::getVetoAlgorithm(
+    const slsDetectorDefs::ethernetInterface interface) const {
+    return sendToDetector<vetoAlgorithm>(F_GET_VETO_ALGORITHM,
+                                         static_cast<int>(interface));
+}
+
+void Module::setVetoAlgorithm(
+    const slsDetectorDefs::vetoAlgorithm alg,
+    const slsDetectorDefs::ethernetInterface interface) {
+    int args[]{static_cast<int>(alg), static_cast<int>(interface)};
+    sendToDetector(F_SET_VETO_ALGORITHM, args, nullptr);
+}
+
 int Module::getADCConfiguration(const int chipIndex, const int adcIndex) const {
     int args[]{chipIndex, adcIndex};
     return sendToDetector<int>(F_GET_ADC_CONFIGURATION, args);
diff --git a/slsDetectorSoftware/src/Module.h b/slsDetectorSoftware/src/Module.h
index 81f6bfee1..a05e49012 100644
--- a/slsDetectorSoftware/src/Module.h
+++ b/slsDetectorSoftware/src/Module.h
@@ -408,6 +408,10 @@ class Module : public virtual slsDetectorDefs {
     void setVeto(bool enable);
     bool getVetoStream() const;
     void setVetoStream(const bool value);
+    slsDetectorDefs::vetoAlgorithm
+    getVetoAlgorithm(const slsDetectorDefs::ethernetInterface interface) const;
+    void setVetoAlgorithm(const slsDetectorDefs::vetoAlgorithm alg,
+                          const slsDetectorDefs::ethernetInterface interface);
     int getADCConfiguration(const int chipIndex, const int adcIndex) const;
     void setADCConfiguration(const int chipIndex, const int adcIndex,
                              int value);
diff --git a/slsDetectorSoftware/tests/test-CmdProxy-gotthard2.cpp b/slsDetectorSoftware/tests/test-CmdProxy-gotthard2.cpp
index a42de01a8..089d8b68b 100644
--- a/slsDetectorSoftware/tests/test-CmdProxy-gotthard2.cpp
+++ b/slsDetectorSoftware/tests/test-CmdProxy-gotthard2.cpp
@@ -686,6 +686,50 @@ TEST_CASE("vetostream", "[.cmd]") {
     REQUIRE_THROWS(proxy.Call("vetostream", {"dfgd"}, -1, GET));
 }
 
+TEST_CASE("vetoalg", "[.cmd]") {
+    Detector det;
+    CmdProxy proxy(&det);
+    auto det_type = det.getDetectorType().squash();
+    if (det_type == defs::GOTTHARD2) {
+        auto prev_val_3g = det.getVetoAlgorithm(defs::ethernetInterface::I3GBE);
+        auto prev_val_10g =
+            det.getVetoAlgorithm(defs::ethernetInterface::I10GBE);
+        {
+            std::ostringstream oss;
+            proxy.Call("vetoalg", {"default", "3gbe"}, -1, PUT, oss);
+            REQUIRE(oss.str() == "vetoalg default 3gbe\n");
+        }
+        {
+            std::ostringstream oss;
+            proxy.Call("vetoalg", {"3gbe"}, -1, GET, oss);
+            REQUIRE(oss.str() == "vetoalg default 3gbe\n");
+        }
+        {
+            std::ostringstream oss;
+            proxy.Call("vetoalg", {"default", "10gbe"}, -1, PUT, oss);
+            REQUIRE(oss.str() == "vetoalg default 10gbe\n");
+        }
+        {
+            std::ostringstream oss;
+            proxy.Call("vetoalg", {"10gbe"}, -1, GET, oss);
+            REQUIRE(oss.str() == "vetoalg default 10gbe\n");
+        }
+        REQUIRE_THROWS(
+            proxy.Call("vetoalg", {"default", "3gbe", "10gbe"}, -1, PUT));
+        REQUIRE_THROWS(proxy.Call("vetoalg", {"default", "none"}, -1, PUT));
+        for (int i = 0; i != det.size(); ++i) {
+            det.setVetoAlgorithm(prev_val_3g[i], defs::ethernetInterface::I3GBE,
+                                 {i});
+            det.setVetoAlgorithm(prev_val_10g[i],
+                                 defs::ethernetInterface::I10GBE, {i});
+        }
+    } else {
+        REQUIRE_THROWS(proxy.Call("vetoalg", {"3gbe"}, -1, GET));
+        REQUIRE_THROWS(proxy.Call("vetoalg", {"none"}, -1, PUT));
+    }
+    REQUIRE_THROWS(proxy.Call("vetoalg", {"dfgd"}, -1, GET));
+}
+
 TEST_CASE("confadc", "[.cmd]") {
     Detector det;
     CmdProxy proxy(&det);
diff --git a/slsSupportLib/include/sls/ToString.h b/slsSupportLib/include/sls/ToString.h
index 65ace1e8c..868ac94ec 100644
--- a/slsSupportLib/include/sls/ToString.h
+++ b/slsSupportLib/include/sls/ToString.h
@@ -36,7 +36,8 @@ std::string ToString(const defs::dacIndex s);
 std::string ToString(const std::vector<defs::dacIndex> &vec);
 std::string ToString(const defs::burstMode s);
 std::string ToString(const defs::timingSourceType s);
-std::string ToString(const defs::EthernetInterface s);
+std::string ToString(const defs::ethernetInterface s);
+std::string ToString(const defs::vetoAlgorithm s);
 
 std::string ToString(const slsDetectorDefs::xy &coord);
 std::ostream &operator<<(std::ostream &os, const slsDetectorDefs::xy &coord);
@@ -298,7 +299,8 @@ template <> defs::readoutMode StringTo(const std::string &s);
 template <> defs::dacIndex StringTo(const std::string &s);
 template <> defs::burstMode StringTo(const std::string &s);
 template <> defs::timingSourceType StringTo(const std::string &s);
-template <> defs::EthernetInterface StringTo(const std::string &s);
+template <> defs::ethernetInterface StringTo(const std::string &s);
+template <> defs::vetoAlgorithm StringTo(const std::string &s);
 
 template <> uint32_t StringTo(const std::string &s);
 template <> uint64_t StringTo(const std::string &s);
diff --git a/slsSupportLib/include/sls/sls_detector_defs.h b/slsSupportLib/include/sls/sls_detector_defs.h
index 13d7f89e2..8cbaf372c 100644
--- a/slsSupportLib/include/sls/sls_detector_defs.h
+++ b/slsSupportLib/include/sls/sls_detector_defs.h
@@ -395,16 +395,18 @@ typedef struct {
     enum timingSourceType { TIMING_INTERNAL, TIMING_EXTERNAL };
 
 #ifdef __cplusplus
-    enum class EthernetInterface {
+    enum class ethernetInterface {
 #else
-    enum EthernetInterface {
+    enum ethernetInterface {
 #endif
         NONE = 0,
-        I3GBE = 1 << 1,
-        I10GBE = 1 << 2,
+        I3GBE = 1 << 0,
+        I10GBE = 1 << 1,
         ALL = I3GBE | I10GBE
     };
 
+    enum vetoAlgorithm { DEFAULT_ALGORITHM };
+
 #ifdef __cplusplus
 
     /** scan structure */
@@ -496,16 +498,18 @@ typedef struct {
 
 #ifdef __cplusplus
 };
-inline slsDetectorDefs::EthernetInterface
-operator|( const slsDetectorDefs::EthernetInterface &a,
-           const slsDetectorDefs::EthernetInterface &b) {
-    return slsDetectorDefs::EthernetInterface(static_cast<int32_t>(a) |
+inline slsDetectorDefs::ethernetInterface
+operator|(const slsDetectorDefs::ethernetInterface &a,
+          const slsDetectorDefs::ethernetInterface &b) {
+    return slsDetectorDefs::ethernetInterface(static_cast<int32_t>(a) |
                                               static_cast<int32_t>(b));
 };
 
-inline slsDetectorDefs::EthernetInterface operator&( const slsDetectorDefs::EthernetInterface &a,
-                       const slsDetectorDefs::EthernetInterface &b) {
-    return slsDetectorDefs::EthernetInterface(static_cast<int32_t>(a) & static_cast<int32_t>(b));
+inline slsDetectorDefs::ethernetInterface
+operator&(const slsDetectorDefs::ethernetInterface &a,
+          const slsDetectorDefs::ethernetInterface &b) {
+    return slsDetectorDefs::ethernetInterface(static_cast<int32_t>(a) &
+                                              static_cast<int32_t>(b));
 };
 #endif
 
@@ -583,7 +587,7 @@ struct detParameters {
 #ifdef __cplusplus
 struct sls_detector_module {
 #else
-typedef struct {
+    typedef struct {
 #endif
     int serialnumber; /**< is the module serial number */
     int nchan;        /**< is the number of channels on the module*/
diff --git a/slsSupportLib/include/sls/sls_detector_funcs.h b/slsSupportLib/include/sls/sls_detector_funcs.h
index 34a772671..93fc842b5 100755
--- a/slsSupportLib/include/sls/sls_detector_funcs.h
+++ b/slsSupportLib/include/sls/sls_detector_funcs.h
@@ -223,6 +223,8 @@ enum detFuncs {
     F_GET_MASTER,
     F_GET_VETO_STREAM,
     F_SET_VETO_STREAM,
+    F_GET_VETO_ALGORITHM,
+    F_SET_VETO_ALGORITHM,
 
     NUM_DET_FUNCTIONS,
     RECEIVER_ENUM_START = 256, /**< detector function should not exceed this
@@ -552,7 +554,8 @@ const char* getFunctionNameFromEnum(enum detFuncs func) {
     case F_GET_MASTER:                      return "F_GET_MASTER";
     case F_GET_VETO_STREAM:                 return "F_GET_VETO_STREAM";
     case F_SET_VETO_STREAM:                 return "F_SET_VETO_STREAM";
-
+    case F_GET_VETO_ALGORITHM:              return "F_GET_VETO_ALGORITHM";    
+    case F_SET_VETO_ALGORITHM:              return "F_SET_VETO_ALGORITHM";
 
     case NUM_DET_FUNCTIONS:              	return "NUM_DET_FUNCTIONS";
     case RECEIVER_ENUM_START:				return "RECEIVER_ENUM_START";
diff --git a/slsSupportLib/include/sls/versionAPI.h b/slsSupportLib/include/sls/versionAPI.h
index c3c69e557..ff5a1fe4d 100644
--- a/slsSupportLib/include/sls/versionAPI.h
+++ b/slsSupportLib/include/sls/versionAPI.h
@@ -9,4 +9,4 @@
 #define APILIB       0x210225
 #define APIRECEIVER  0x210225
 #define APIGUI       0x210225
-#define APIGOTTHARD2 0x210715
+#define APIGOTTHARD2 0x210721
diff --git a/slsSupportLib/src/ToString.cpp b/slsSupportLib/src/ToString.cpp
index 4db40a60b..4c038541a 100644
--- a/slsSupportLib/src/ToString.cpp
+++ b/slsSupportLib/src/ToString.cpp
@@ -519,16 +519,18 @@ std::string ToString(const defs::timingSourceType s) {
     }
 }
 
-std::string ToString(const defs::EthernetInterface s) {
+std::string ToString(const defs::ethernetInterface s) {
     std::ostringstream os;
     std::string rs;
     switch (s) {
-    case defs::EthernetInterface::NONE:
+    case defs::ethernetInterface::NONE:
         return std::string("none");
     default:
-        if ((s & defs::EthernetInterface::I3GBE)!=defs::EthernetInterface::NONE)
+        if ((s & defs::ethernetInterface::I3GBE) !=
+            defs::ethernetInterface::NONE)
             os << "3gbe, ";
-        if ((s & defs::EthernetInterface::I10GBE)!=defs::EthernetInterface::NONE)
+        if ((s & defs::ethernetInterface::I10GBE) !=
+            defs::ethernetInterface::NONE)
             os << "10gbe, ";
         auto rs = os.str();
         rs.erase(rs.end() - 2, rs.end());
@@ -536,6 +538,15 @@ std::string ToString(const defs::EthernetInterface s) {
     }
 }
 
+std::string ToString(const defs::vetoAlgorithm s) {
+    switch (s) {
+    case defs::DEFAULT_ALGORITHM:
+        return std::string("default");
+    default:
+        return std::string("Unknown");
+    }
+}
+
 const std::string &ToString(const std::string &s) { return s; }
 
 template <> defs::detectorType StringTo(const std::string &s) {
@@ -876,17 +887,23 @@ template <> defs::timingSourceType StringTo(const std::string &s) {
     throw sls::RuntimeError("Unknown timing source type " + s);
 }
 
-template <> defs::EthernetInterface StringTo(const std::string &s) {
+template <> defs::ethernetInterface StringTo(const std::string &s) {
     std::string rs = s;
     if (s.find(',') != std::string::npos)
         rs.erase(rs.find(','));
     if (rs == "none")
-        return defs::EthernetInterface::NONE;
+        return defs::ethernetInterface::NONE;
     if (rs == "3gbe")
-        return defs::EthernetInterface::I3GBE;
+        return defs::ethernetInterface::I3GBE;
     if (rs == "10gbe")
-        return defs::EthernetInterface::I10GBE;
-    throw sls::RuntimeError("Unknown EthernetInterface type " + s);
+        return defs::ethernetInterface::I10GBE;
+    throw sls::RuntimeError("Unknown ethernetInterface type " + s);
+}
+
+template <> defs::vetoAlgorithm StringTo(const std::string &s) {
+    if (s == "default")
+        return defs::DEFAULT_ALGORITHM;
+    throw sls::RuntimeError("Unknown veto algorithm " + s);
 }
 
 template <> uint32_t StringTo(const std::string &s) {
diff --git a/slsSupportLib/tests/test-ToString.cpp b/slsSupportLib/tests/test-ToString.cpp
index e372f9336..c8e720734 100644
--- a/slsSupportLib/tests/test-ToString.cpp
+++ b/slsSupportLib/tests/test-ToString.cpp
@@ -324,10 +324,10 @@ TEST_CASE("Print a member of patternParameters") {
     REQUIRE(ToString(pat->limits) == "[4, 100]");
 }
 
-TEST_CASE("EthernetInterface") {
-    REQUIRE(ToString(sls::defs::EthernetInterface::NONE) == "none");
-    REQUIRE(ToString(sls::defs::EthernetInterface::I10GBE) == "10gbe");
-    REQUIRE(ToString(sls::defs::EthernetInterface::I3GBE) == "3gbe");
-    REQUIRE(ToString(sls::defs::EthernetInterface::I3GBE |
-                     sls::defs::EthernetInterface::I10GBE) == "3gbe, 10gbe");
+TEST_CASE("ethernetInterface") {
+    REQUIRE(ToString(sls::defs::ethernetInterface::NONE) == "none");
+    REQUIRE(ToString(sls::defs::ethernetInterface::I10GBE) == "10gbe");
+    REQUIRE(ToString(sls::defs::ethernetInterface::I3GBE) == "3gbe");
+    REQUIRE(ToString(sls::defs::ethernetInterface::I3GBE |
+                     sls::defs::ethernetInterface::I10GBE) == "3gbe, 10gbe");
 }
\ No newline at end of file