diff --git a/webserver.py b/webserver.py
index ac0a998..9ba3e00 100755
--- a/webserver.py
+++ b/webserver.py
@@ -14,7 +14,9 @@ import flask
 import circularlog
 
 
-instlist = ['AMOR', 'BOA', 'CAMEA', 'DMC', 'EIGER', 'FOCUS', 'HRPT', 'SANS', 'TASP', 'ZEBRA']
+instruments = {ins: 8642 for ins in 
+    ['amor', 'boa', 'camea', 'dmc', 'eiger', 'focus', 'hrpt', 'sans', 'tasp', 'zebra']
+}
 
 
 def guess_mimetype(filename):
@@ -376,7 +378,15 @@ a {
         chunk_list.sort(reverse=True)
         for end, beg, key, devices in chunk_list:
             today, begdate, enddate = (time.strftime("%Y-%m-%d", time.localtime(t)) for t in (now, beg, end))
-            args = ['='.join(key)]
+            port = None
+            if key[0] == 'instrument': 
+                ins = key[1]
+                port = instruments.get(ins)
+            if port is None:
+                args = ['='.join(key)]
+            else:
+                host = f'http://{ins}.psi.ch:{port}'
+                args = []
             if end > now:
                 if begdate == today:
                     daterange = f'since {time.strftime("%H:%M", time.localtime(beg))}'
@@ -392,13 +402,15 @@ a {
                         title('older than 30 days')
                         showtitle = 2
 
-            out.append(f'<tr><th><a href="/?{"&".join(args)}">{key[1]} / {" ".join(devices)}</a></th>')
+            out.append(f'<tr><th><a href="{host}/?{"&".join(args)}">{key[1]} / {" ".join(devices)}</a></th>')
             out.append(f'<td>{daterange}</td></tr>')
         if timerange:
             out.append(f'<h3><a href="/select_experiment?time=all">earlier dates</a></h3><br>')
         out.append('</table>')
-        out.append('<h3>servers on the instruments:</h3>')
-        out.extend([f"<a href='http://{i.lower()}.psi.ch:8642/'>{i}</a>&nbsp;\n" for i in instlist])
+        out.append('<h3><a href="http://linse-c.psi.ch:8888/">central server</a></h3>')
+        out.append('<h3>direct link to instruments:</h3>')
+        out.extend([f'<a href="http://{ins}.psi.ch:{port}/">{ins}</a>&nbsp;\n'
+                    for ins, port in instruments.items()])
         out.extend(['</body></html>', ''])
     except Exception as e:
         logging.error('%s', traceback.format_exc())