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Forum LockedConnection to Cisco ASA1510

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timinator View Drop Down
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    Posted: August 23 2010 at 2:11am
Hi I'm trying to connect to a Cisco ASA1510 using Accuterm 2K2 ssh port 22. I'm getting the error:
 
"No supported signature scheme exists (SSH)"
 
I am able to connect using Putty. Is there a setting in Accuterm that will allow this connection?
 
Thanks
Tim
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PSchellenbach View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PSchellenbach Quote  Post ReplyReply Direct Link To This Post Posted: August 23 2010 at 4:22am
Hi Tim -

According to a Cisco FAQ:
     
    Q. Does Cisco IOSŪ SSH version 2 support Digital Signature Standard (DSS)?

    A. Cisco IOS SSH version 2 (derived from OpenSSH code) does not support DSS.

However, according to the SSH specification in RFC 4253, DSS signature is required to be supported:

   The following public key and/or certificate formats are currently defined:

   ssh-dss           REQUIRED     sign   Raw DSS Key

AccuTerm only supports the DSS signature scheme for DSS keys, which works with most SSH servers since this is a required scheme.

If your device supports RSA keys, maybe you can use them instead of DSS keys, as the RSA key signature uses SHA-1 hash.

Thanks,

Pete
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