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тАО04-07-2008 04:56 PM
тАО04-07-2008 04:56 PM
SSH Users Dropped
I have an Alpha Server DS10 running OVMS 8.3 with TCPIP Services 5.6-ECO2.
We use SSH to allow PC terminal connections to the server in a secure LAN.
On a regular day I'll have 3 to 8 users, different one's on different days, tell me that they were dropped in the middle of data entry. They can log back in right away.
I've verified that its during data entry and not idle timeouts.
I've tried several different emulator programs and the results are the same. The network is not anywhere close to capacity, all PC are new(ish). There are maybe 35 users logged in at anyone time.
The SSH documentation really offers nothing and what log files there are don't show anything.
Any ideas, all are welcome.
Thanks.
Steve.
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тАО04-07-2008 07:51 PM
тАО04-07-2008 07:51 PM
Re: SSH Users Dropped
similarly affected? Any reason not to
suspect some generic network (hardware,
firewall, ...) problem?
Run a continuous "ping" to a problem client
system, and record the results to compare
with failure complaints?
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тАО04-07-2008 08:08 PM
тАО04-07-2008 08:08 PM
Re: SSH Users Dropped
There are no telnet sessions on this LAN but prior to upgrading to 8.3 of OVMS we used and open source port of an SSH1 server that I think was done by David Jones. We never had any problems with these random drops. This is new since we upgraded a month ago.
There are a lot of other network services that would be effected if it was server hardware and I've not seen anything in there logs to indicate a problem.
I will try the continuous ping. Thanks for the idea.
Steve/
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тАО04-07-2008 09:41 PM
тАО04-07-2008 09:41 PM
Re: SSH Users Dropped
does the OpenVMS accounting file (process or image accounting records) show any specific error status if the user is dropped ? If so, you could obtain exact date and time data about the dropped connections.
Volker.
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тАО04-07-2008 11:49 PM
тАО04-07-2008 11:49 PM
Re: SSH Users Dropped
Wim
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тАО04-08-2008 01:39 AM
тАО04-08-2008 01:39 AM
Re: SSH Users Dropped
after logging into our Alpha via TELNET, then using SSH to login to our rx2600 and then killing the TELNET-connection, the interactive process on the rx2600 is (according to accounting) terminated with:
Final status code: 0001C0F4
Final status text: %RMS-F-RER, file read error
If I log out normally on the rx2600 and thus normally terminate the SSH connection, the final status code is 10000001 %SYSTEM-S-NORMAL, normal successful completion
So you may indeed try to check your accounting file with:
$ ACC/SINCE=
to see if this shows any pattern or shows more SSH users getting dropped without complaining.
Volker.
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тАО04-08-2008 06:49 AM
тАО04-08-2008 06:49 AM
Re: SSH Users Dropped
Thanks for the great suggestion's. I'll look into this today and report back shortly.
Steve/
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тАО04-08-2008 09:56 PM
тАО04-08-2008 09:56 PM
Re: SSH Users Dropped
In our system in SYS$SYSDEVICE:[TCPIP$SSH.SSH2]SSHD2_CONFIG.; we have the entry IdleTimeOut 8h.
Should only logout after idle time, but I have had times where I was logged off after having been typing in the windows minutes earlier. So I fear IdleTimeOut doesn't in all cases only work after being idle. Try change the value to see if it makes any difference.
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тАО04-11-2008 10:42 AM
тАО04-11-2008 10:42 AM
Re: SSH Users Dropped
NorthVancouver >acc/since=today/type=process/process=interactive/user=dsutherland/full
INTERACTIVE Process Termination
-------------------------------
Username: DSUTHERLAND UIC: [GRUSSELL]
Account: Finish time: 11-APR-2008 10:04:28.28
Process ID: 0000145C Start time: 11-APR-2008 09:04:27.25
Owner ID: Elapsed time: 0 01:00:01.03
Terminal name: FTA26: Processor time: 0 00:00:00.36
Remote node addr: Priority: 4
Remote node name: Privilege <31-00>: 00108000
Remote ID: DSUTHERLAND(LOC Privilege <63-32>: 00000000
Remote full name: 192.168.0.63
Posix UID: -2 Posix GID: -2 (%XFFFFFFFE)
Queue entry: Final status code: 00002BD4
Queue name:
Job name:
Final status text: %SYSTEM-F-EXITFORCED, forced exit of image or process by SYS$DELPRC
Page faults: 1053 Direct IO: 249
Page fault reads: 106 Buffered IO: 1027
Peak working set: 7504 Volumes mounted: 0
Peak page file: 176064 Images executed: 7
NorthVancouver >help/message "%SYSTEM-F-EXITFORCED"
EXITFORCED, forced exit of image or process by SYS$DELPRC
Facility: SYSTEM, System Services
Explanation: Another process caused the image to exit using the SYS$DELPRC
system service. In this use of SYS$DELPRC, an image exit
occurs (rather than a process deletion).
User Action: None. This is a fatal error message.
Any suggestions as to what could cause this?
Thanks
Steve/
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тАО04-11-2008 11:37 AM
тАО04-11-2008 11:37 AM