I'll compare the result from an ifconfig -a next time I have this problem like Duc suggests and try stopping and starting the interface. Strange thing is it happens to all of the unix stations, not just one of them. The local VT100 works fine, also the stations continue to work fine, no blue fields. I'm investigating another possible cause for the moment, Global IT has an EPO server scanning all connections to the LAN, and since our unix stations are also connected to the business lan, the ports may get blocked by the scanning or after the scanning took place for some reason. We took out the unix stations' IP adresses in the EPO servers scanlist so they won't get scanned anymore, see what happens.... Thanks for the help guys, Dirk Pauwels - DCS/MOC coordinator Engineering dept. Hexion Specialty Chemicals E mail: dirk.pauwels@xxxxxxxxxx T. +32.(0)3.570.95.97 F. +32.(0)3.570.16.09 Mob. +32.(0)497.428.300 Maks Wilde <mwilde@xxxxxxxx> Sent by: foxboro-bounce@xxxxxxxxxxxxx 04/05/2009 20:00 Please respond to foxboro@xxxxxxxxxxxxx To foxboro@xxxxxxxxxxxxx cc Subject Re: [foxboro] network locked Dirk, Did you have local access to the stations? I have experienced the same problems on a 6.3 system where the station ran out of processes (eg: cannot open a new VT100). The station would appear to run fine, except no new process or connection could be started. You can run "sar -v 1 2" to see the number of processes and "ps" (with options) to investigate. If it's only a connection problem, you should try stopping and starting the secondary ethernet interface locally and see if it that resolves the problem. Hope this helps, Maks Wilde > > _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave