Rstudio server port forwarding

[scottbrainard]

Like this user:

R studio server, can't forward to port 8787

Hi there, We have an instance of R studio running on port 8787. We can access it normally from work using: server_url:8787 When not at work, after connecting to work VPN, we normally set an ssh forward using: ssh -N -f -L localhost:8787:localhost:8787 username@server_url And then, access R studio through a browser using the address: localhost:8787 Recently, we have been unable to access R studio from outside work (from work, it is still fine) SSH forwards to other ports continue to work normally, but forwards to port 8787 don't seem to work anymore. Any reason what could be causing this? Any help will be highly appreciated. Thanks! Here is the output of sessionInfo() from R sessi…

I am trying to perform SSH port forwarding, but I'm trying to do it over the google cloud platform. I know I have RStudio Server working, because I can allow open port 8787 to TCP, and log-in that way. But that isn't super secure, so I'd like to do SSH port forwarding instead.

When I run:

gcloud compute ssh <vm-name> \
    --project <project-id> \
    --zone <zone> \
    -- -NL 1080:localhost:8787

I get no errors, but I don't see anything at localhost:1080. Any suggestions for how to debug would be great. Thanks!

[rstub]

In principle this does look correct. You could add debug output by adding -v, -vv or even -vvv to the SSH options after --.

[scottbrainard]

Yep, problem seems to be around here:

debug1: Remote: /home/user/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: Remote: /home/user/.ssh/authorized_keys:2: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: Connection to port 1080 forwarding to localhost port 8787 requested.
debug1: channel 2: new [direct-tcpip]
channel 2: open failed: connect failed: Connection refused
debug1: channel 2: free: direct-tcpip: listening port 1080 for localhost port 8787, connect from ::1 port 59609 to ::1 port 1080, nchannels 3
debug1: Connection to port 1080 forwarding to localhost port 8787 requested.
debug1: channel 2: new [direct-tcpip]
channel 2: open failed: connect failed: Connection refused
debug1: channel 2: free: direct-tcpip: listening port 1080 for localhost port 8787, connect from ::1 port 59612 to ::1 port 1080, nchannels 3
debug1: Connection to port 1080 forwarding to localhost port 8787 requested.
debug1: channel 2: new [direct-tcpip]
channel 2: open failed: connect failed: Connection refused
debug1: channel 2: free: direct-tcpip: listening port 1080 for localhost port 8787, connect from ::1 port 59619 to ::1 port 1080, nchannels 3
debug1: Connection to port 1080 forwarding to localhost port 8787 requested.
debug1: channel 2: new [direct-tcpip]
channel 2: open failed: connect failed: Connection refused
debug1: channel 2: free: direct-tcpip: listening port 1080 for localhost port 8787, connect from ::1 port 59624 to ::1 port 1080, nchannels 3
debug1: Connection to port 1080 forwarding to localhost port 8787 requested.