SSH debug packet types

user_11766796 0
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Does anyone know where I can find the descriptions of the SSH packet types received?

I am having trouble connecting via ssh to a router of mine and in the ssh debug I am receiving a packet type 1 from the router before disconnecting. Can't seem to find out what this mean.

Router IP address have been changed

debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 1
Received disconnect from 192.168.1.1 port 22:11:
ssh unix
1 Answers

This document describes the following excerp of initially used packet types from the numbering scheme in detail.

     Message ID                            Value    Reference
     -----------                           -----    ---------
     SSH_MSG_DISCONNECT                       1     [SSH-TRANS]
     SSH_MSG_IGNORE                           2     [SSH-TRANS]
     SSH_MSG_UNIMPLEMENTED                    3     [SSH-TRANS]
     SSH_MSG_DEBUG                            4     [SSH-TRANS]
     SSH_MSG_SERVICE_REQUEST                  5     [SSH-TRANS]
     SSH_MSG_SERVICE_ACCEPT                   6     [SSH-TRANS]
     SSH_MSG_KEXINIT                         20     [SSH-TRANS]
     SSH_MSG_NEWKEYS                         21     [SSH-TRANS]
     SSH_MSG_USERAUTH_REQUEST                50     [SSH-USERAUTH]
     SSH_MSG_USERAUTH_FAILURE                51     [SSH-USERAUTH]
     SSH_MSG_USERAUTH_SUCCESS                52     [SSH-USERAUTH]
     SSH_MSG_USERAUTH_BANNER                 53     [SSH-USERAUTH]
     SSH_MSG_GLOBAL_REQUEST                  80     [SSH-CONNECT]
     SSH_MSG_REQUEST_SUCCESS                 81     [SSH-CONNECT]
     SSH_MSG_REQUEST_FAILURE                 82     [SSH-CONNECT]
     SSH_MSG_CHANNEL_OPEN                    90     [SSH-CONNECT]
     SSH_MSG_CHANNEL_OPEN_CONFIRMATION       91     [SSH-CONNECT]
     SSH_MSG_CHANNEL_OPEN_FAILURE            92     [SSH-CONNECT]
     SSH_MSG_CHANNEL_WINDOW_ADJUST           93     [SSH-CONNECT]
     SSH_MSG_CHANNEL_DATA                    94     [SSH-CONNECT]
     SSH_MSG_CHANNEL_EXTENDED_DATA           95     [SSH-CONNECT]
     SSH_MSG_CHANNEL_EOF                     96     [SSH-CONNECT]
     SSH_MSG_CHANNEL_CLOSE                   97     [SSH-CONNECT]
     SSH_MSG_CHANNEL_REQUEST                 98     [SSH-CONNECT]
     SSH_MSG_CHANNEL_SUCCESS                 99     [SSH-CONNECT]
     SSH_MSG_CHANNEL_FAILURE                100     [SSH-CONNECT]

In your case you (your ssh client) sent the packet type 50 which is SSH_MSG_USERAUTH_REQUEST as described in plain text by the debug line starting with debug2. Afterwards you receive a packet type 1 from the ssh server telling your client to disconnect without a specific reason (User auth failure would have been packet type 51).

So in order to tell you what your issue is exactly with this little information is not possible, but I hope the link to the documentation helps.

user_62079830
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