RDM SSH Connection to icx switch keeps disconnecting.
Hi,
I'm experiencing problems with RDM ssh connections to my icx switch.
Connections keeps disconnecting few seconds after login.
I'm getting the error FAIL_PROTOCOL_ERROR.
In log file the error is Received disconnection message, code: 2 Reason: Bad packet content
When connecting to switch with putty I do not have that problems.
TY.
LOG:
[22.11.2022. 14:38:45] Devolutions Protocols version: 2022.11.8.1 Windows
[22.11.2022. 14:38:45] Starting SSH, verbose level: 2
[22.11.2022. 14:38:45] Setting up connection
[22.11.2022. 14:38:45] Connecting to port: 22 (IP any)
[22.11.2022. 14:38:45] Empty pre-connection PDU, ingnored
[22.11.2022. 14:38:45] SSH banner: SSH-2.0-RomSShell_5.40
[22.11.2022. 14:38:45] Sending kex init
[22.11.2022. 14:38:45] Received kex init
[22.11.2022. 14:38:45] Selected algorithms: diffie-hellman-group14-sha1, ssh-rsa, aes256-ctr, aes256-ctr, hmac-sha1, hmac-sha1, none, none
[22.11.2022. 14:38:45] Sending diffie-hellman kex init
[22.11.2022. 14:38:47] Received diffie-hellman kex reply
[22.11.2022. 14:38:47] Successfully authentified server
[22.11.2022. 14:38:47] Sending new keys message
[22.11.2022. 14:38:47] Sending userauth service request
[22.11.2022. 14:38:47] Received new keys message
[22.11.2022. 14:38:47] Received service accepted message
[22.11.2022. 14:38:47] Agent has no keys
[22.11.2022. 14:38:47] No suitable key found for authentication
[22.11.2022. 14:38:47] Sending userauth init request
[22.11.2022. 14:38:47] Received userauth failure: publickey,password,keyboard-interactive
[22.11.2022. 14:38:47] Starting interactive authentication
[22.11.2022. 14:38:47] Sending userauth interactive request
[22.11.2022. 14:38:47] Received userauth info request:
[Prompt->Password:]
[22.11.2022. 14:38:47] Sending userauth interactive response
[22.11.2022. 14:38:47] Received userauth success
[22.11.2022. 14:38:47] User authenticated successfuly by password interactive
[22.11.2022. 14:38:47] Sending session channel open request: 0/-
[22.11.2022. 14:38:47] Received channel open confirmation: 0/0 WS 200000/8192 MPS 32000/8192
[22.11.2022. 14:38:47] Sending pty request: 0/0 xterm-256color width = 228 height = 59
[22.11.2022. 14:38:47] Received channel success: 0/0
[22.11.2022. 14:38:47] Sending shell request: 0/0
[22.11.2022. 14:38:47] Received channel success: 0/0
[22.11.2022. 14:38:52] Received disconnection message, code: 2
[22.11.2022. 14:38:52] Reason: Bad packet content
[22.11.2022. 14:38:52] Disconnection in progress
[22.11.2022. 14:38:52] Sending channel close request: 0/0
[22.11.2022. 14:38:52] Bytes sent: 1340, Bytes received: 1684
[22.11.2022. 14:38:52] Packets sent: 13, Packets received: 12
[22.11.2022. 14:38:52] Kex completed: 1
[22.11.2022. 14:38:52] Disconnecting
All Comments (5)
Hello,
May I ask you if you've tried configuring the Algorithm Support option within your SSH session entry ?
If so, what have you done so far ?
Best Regards,
Hi,
I tried to change Algorithm support, different combinations, Skip enviroment variable setup, Disable Nagle's algorithm. No luck. Always got disconnected on some switches sooner on some later (5-30 seconds). If I'm fast I'm able to write in terminal until the session closes.
This is output from icx ssh configuration:
>sh ip ssh config
SSH server : Enabled
SSH port : tcp\22
Host Key : RSA 2048
Encryption : aes256-cbc, aes192-cbc, aes128-cbc, aes256-ctr, aes192-ctr, aes128-ctr, 3des-cbc
Permit empty password : No
Authentication methods : Password, Public-key, Interactive
Authentication retries : 3
Login timeout (seconds) : 120
Idle timeout (minutes) : 5
SCP : Enabled
SSH IPv4 clients : All
SSH IPv6 clients : All
SSH IPv4 access-group :
SSH IPv6 access-group :
SSH Client Keys :
Client Rekey : 0 Minute, 0 KB
Server Rekey : 0 Minute, 0 KB
Hello,
Thank you for your swift reply!
Would it be possible for you to create a portable installation of the latest version of RDM and see if this issue still occurs? To do so, you will need to do the following:
1- Download the .zip file below:
https://remotedesktopmanager.com/home/thankyou/rdmbin
2- Create a new folder on your Desktop
3- Extract the content of the .zip file into the folder created at #2
4- Go to this folder once the .zip file has been extracted and run remotedesktopmanager.exe
5- Create an SSH Entry in the local data source created by default
6- Try to reproduce this issue
Best regards,
James Lafleur
Hi,
I've done everything you wrote. I needed to configure Algorithm support to diffie-hellman-group14-sha1, ssh-rsa, aes256-ctr, aes256-ctr, hmac-sha1, hmac-sha1, and it worked.
The problem was in Advanced/ping interval... It was configured to 5 sec. I set it on default value 0 and now it works.
Thank you.
Hello,
I am glad to see that you have found a fix for this issue. Thank you for sharing it with us.
Do not hesitate to contact us again if you require further assistance.
Best regards,
James Lafleur