>>> On 10/11/2014 at 10:09 AM, Dennis Foreman <[email protected]> wrote: > Greetings, > I am hoping someone out there has seen the problem below and has a solution. > (PS. I am NOT the system administrator, just a user.) > We are running RHEL 2.6.18-92.e15 Server 5.2 on zVM 6.3.0 service lvl 1302. > > My students and I are all experiencing this problem: > 1. Set up a VPN tunnel to our VM site (if we are off-campus) > 2. Connect via MTN3270 from Windows 7 > 3. Boot Linux (no mods) > 4. #cp disc (with SET RUN ON) > 5. Cannot connect to Linux via SSH, Putty, VNC-clients (the VPN tunnel > is still open) > BUT, if we leave the 3270 session open (not logged in to Linux), we can > connect and all is OK. Also, if we re-open the 3270 window after we > disconnect and leave it open, we can then connect. > > We have been using Linux on zVM for several years w/o this problem. Does > anyone have any tips on what to look for?
I would start with basic network connectivity troubleshooting. When there is not a 3270 session active: 1. See what "route print" shows on the Windows system. 2. Try to ping the server. 3. Use tracert from Windows to the server to see how far things are getting. 4. Can other guests on the same subnet access the server? (This means getting two people to work together of course.) 5. Does the Linux system see any incoming packets? You'll probably have to run tcpdump in the background before stopping the 3270 session. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
