After upgrade ssh server to OpenSSH_6.4p1-hpn14v2, OpenSSL 1.0.0j 10 May 2012 I can't connect to this server when using ssh decryption on Palo Alto.
Before ssh server upgrade, decryption was working correctly and I could connect and decrypt ssh traffic.
When I'm trying to connect from client PC I get response:'Server unexpectly closed network connection'.
I check that Palo Alto is sending this message to the client PC (as an SSH proxy) not the destination SSH server.
I also try to connect from the same client PC with SSH decryption turned off, and I could connect.
I'm using PA-3020 with 5.0.9 PAN-OS.
Do you have a decyption profile attached to the ssl decypt policy ? What have you configured for unsupported mode checks and failure checks.
Set up a filter and run ssl counters to get more info.
show counter global filter category ssl
Keep an eye out for PAN OS 5.0.10. A fix for an issue with some SSH proxy sessions not working to OpenSSH servers versions > 6.2 is being published through fix # 57612
This fix, when available, may help you.
Look in Rn for version 5.0.10, there is:
57612—SSH sessions to servers running OpenSSH version 6.2 or newer through SSH
Decryption were failing in some instances when the computed Diffie-Hellman key is
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