I'm trying to connect my computer LocalClient to RemoteHost via a JumpHost that I have no control over. I have complete control of the client and RemoteHost (admin privileges)
I can connect to the RemoteHost from LocalClient perfectly via ssh as:
ssh -tX relayUserName@JumpHost remoteUser@RemoteHostIP
My ~/.ssh/config file has the config as:
Host RemoteHost
ProxyCommand ssh -W %h:%p JumpHost
Now, if I try to tunnel through the RemoteHost, I get an error as:
channel 0: open failed: administratively prohibited: open failed
stdio forwarding failed
Using ssh -v, I get a little more information
Authenticated to <JumpHost> ([JumpHostIP]:22).
debug1: channel_connect_stdio_fwd RemoteHostIP:22
debug1: channel 0: new [stdio-forward]
debug1: getpeername failed: Bad file descriptor
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: pledge: network
channel 0: open failed: administratively prohibited: open failed
stdio forwarding failed
ssh_exchange_identification: Connection closed by remote host
Based on this answer, I've checked the values of sshd_config in /etc/ssh/ on RemoteHost and (manually) set
AllowTcpForwarding yes
The problem still persists and I don't know what else to try.
Details:
- OS:
RemoteHostandLocalClient: Kubuntu 18.04 LTS - ssh versions (arrived via ssh -v ) :
RemoteHostandLocalClient:OpenSSH_7.6p1 Ubuntu-4ubuntu0.3, OpenSSL 1.0.2n 7 Dec 2017 - ssh version:
JumpHost(arrived via ssh -v debug1):
debug1: Local version string SSH-2.0-OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH_5* compat 0x0c000000
As a side note, I need to tunnel to the RemoteHost to access a Jupyter Lab instance running with --no-browser --port=8889 and forward it to my LocalClient's port 8888 for accessing my experiments remotely via a browser on localhost:8888