SSH stops working

Hi DT,

You may wish to investigate the Cisco Feature Navigator:

Brad Reese BradReese.Com Cisco Repair Service Experts

Hi Brad, thanks for your reply. Yes I did use those URL when I set up SSH on my router. I may have to read it again.

What I do not understand is after I restart the router, it works fine again.

DT

client exits without any error messages)

accept new connections.

Hi Alex, thanks for your reply. I get the error "Connection refused.". No I do not change the key. Currently my temporary fix is to restart the router ( if it happens during the weekend ) or to use my Linux box with the serial cable to the console.

DT

Which kind of problem (connection timeout, connection refused or simply the client exits without any error messages) Have you perhaps changed RSA keys? After having changed them it will never accept new connections. It happened to me with 12.4.1

HTH Alex.

client exits without any error messages)

accept new connections.

Hi Polio, thanks for your reply.

Yes, that's what I am waiting for at this time :) because it only happens sometimes, and while waiting for it to happen again, I would like to know if anybody experiences it. :)

DT

client exits without any error messages)

accept new connections.

Since you're on the console you could do some debug to find out what's going on.

I used to see this happen when the router runs out of memory.

it seems to be a ARP issue. if it occurs again just clear the ARP on your oruter and your ISP router. See if it works. After that. Rebooting the router clears all the tables that is the only diference. so may be you could clear the nat table as well.

While it happens please have a look to the number of connections opened by the router for NAT ("sh ip nat tra") in case use

ip nat translation max-entries

Alex.

Barry, Alex, Rave,

Thanks for your reply. It makes sense to check what you suggested ( more memory, NAT table is full, or ARP table is corrupted ).

This problem does not always happen . To be safe than sorry, I just ordered a 512Mb to put in the router which is in production right now.

I have another same router in development. I am going to use some Linux boxes, each for simulating one internal network, they will run the script to change their ip, mac address, to issue some ftp/web access. I hope this will help finding out the culprit.

Thanks again,

DT

schrieb im Newsbeitrag news: snipped-for-privacy@o13g2000cwo.googlegroups.com...

Have you thought about this to be some kind of software bug? I mean, it looks like random unsolicited behaviour whenever it happens. May be its a bug. I think, may be you should try another release (e.g. 12.4.2T).

Extra information:

"Early Deployment (ED) --- Software releases that provide new features and new platform support

"Limited Deployment (LD) --- A Major Release of Cisco IOS software is said to be in the "Limited Deployment" phase of its lifecycle during the period between initial FCS and the General Deployment (GD) milestones."

This problem just happened again. And I just found out that I set the vtys only from 0 to 4, and I used all of them.

After extending this number, I am able to ssh to the router again. :-)

DT