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SSH to Extreme Switch fails, "Server signature does not match"

dwar over 12 years ago

Hi all,

I'm trying to configure our SolarWinds CatTools 3.6 (Enterprise) to backup the configuration of our Extreme Switches (Summit X350).

Unfortunately I get an error when trying to connect to the switch, the following is from the Info Log:

"Failed to connect to <ip address>. Reason: (30015) Server signature does not match.. Giving up after 3 connection attempts."

These are new switches so there shouldn't be any old signatures, and that shouldn't be the problem anyway, right?

I can connect to the switch with putty.

I have three different ssh connection methods to choose from in the device configuration; SSH2, Extreme SSH2 and SSH2-nopty. I am a bit unsure about the difference between them but I have tried them all without succeeding.

Telnet works (if I allow it), but we need to use SSH.

Does anyone recognise this problem?

Please let me know if you need any more information from me.

Best regards,

Daniel

0 Spartacus over 12 years ago

Hi Daniel,
I've seen this come up just once before (internal REF: FB63912 / NS 244050) but while I was going back and forth troubleshooting with the customer, the issue suddenly went away and neither I nor the customer were able to determine the cause or what changed to make it go away.
I have a connection tester tool which I'll send you offline so we can perform some troubleshooting and hopefully determine what the issue may be.
Regards,
Steve
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0 dwar over 12 years ago in reply to Spartacus

Hi Steve,

Thanks, although I should have mentioned here that I went ahead and started a support ticket regarding this.
I have recieved that connection tester from the support technician and will try it as soon as possible, hopefully today.
I will update this thread if we find any solution.

Regards,
Daniel
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0 Spartacus over 12 years ago in reply to dwar

OK no worries Daniel. I'll leave you in the capable hands of support for now.
Can you provide the support ticket reference #, so I can liaise with the support rep?
Thanks,
Steve
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0 dwar over 12 years ago in reply to Spartacus

Ok.. Suddenly it works for me as well. Strange.
I will send you the ticket number.

Regards,
Daniel
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