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sw:ssh:issues [2023/07/14 15:22] – niziaksw:ssh:issues [2023/07/14 15:29] (current) – niziak
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 ===== debug1: expecting SSH2_MSG_KEX_ECDH_REPLY ===== ===== debug1: expecting SSH2_MSG_KEX_ECDH_REPLY =====
  
-SSH hangs on ''debug1: expecting SSH2_MSG_KEX_ECDH_REPLY''+SSH hangs on ''debug1: expecting SSH2_MSG_KEX_ECDH_REPLY'' when using VPN (OpenVPN, MT Ipsec, ... doesn't matter).
  
 Not catched root issue yet. Internet says it is related to packet size. So some workaround sometimes works: Not catched root issue yet. Internet says it is related to packet size. So some workaround sometimes works:
   - reducing MTU in interface   - reducing MTU in interface
   - limiting Kex list (reduce packet size during exchange)   - limiting Kex list (reduce packet size during exchange)
 +  - specifing cipher for connection
  
-<code bash+ 
 +<code bash>ip li set mtu 1400 dev wlan0</code> 
 + 
 +<code bash>ssh -c aes256-gcm@openssh.com host</code> 
 + 
 +<code bash>
 ssh -o KexAlgorithms=ecdh-sha2-nistp521 username@systemname ssh -o KexAlgorithms=ecdh-sha2-nistp521 username@systemname
 </code> </code>
Line 16: Line 22:
 KexAlgorithms ecdh-sha2-nistp521 KexAlgorithms ecdh-sha2-nistp521
 </file> </file>
 +
 +Source:
 +  * [[https://serverfault.com/questions/210408/cannot-ssh-debug1-expecting-ssh2-msg-kex-dh-gex-reply|Cannot SSH: debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY [closed]
 +]]
 +  * [[https://askubuntu.com/questions/1229456/ssh-fails-with-connection-timed-out-in-vpn-and-hangs-here-expecting-ssh2-msg|SSH fails with connection timed out - in VPN and hangs here "expecting SSH2_MSG_KEX_ECDH_REPLY" + Ubuntu 16.04.6 LTS]]
  
 ===== X11 forwarding request failed on channel 0 ===== ===== X11 forwarding request failed on channel 0 =====