[X2Go-User] x2gomountdirs fails on Debian Stable (x2goclient 4.1.2.2)

Dear All,

first of all: great software, we (a small educational organisation for trade union members) have been working with it for years.

TL;DR: shared folders do not work, when I use the GUI to mount a share directory ~/media/disk/SHARE-NAME remains empty.

Our Setup:

• x2goserver on a computer behind a rounter with portforwarding and dyndns
• x2goclient on a computer behind another router
• both debian stable

The connection from x2goclient to x2goserver works (I mean: I get my remote desktop and work there), but when I want to use/mount a shared folder, nothing happens. I mean: If I want to access a folder on the x2goclient via the x2go function “shared folders” from the x2goserver, the directory ~/media/disk/SHARE-NAME remains empty.

When I trigger the release in the GUI of x2goclient, the logs say:

on x2goclient

Nov 06 00:00:02 x2go /usr/bin/x2gomountdirs[295124]: insertion of shared folder into session DB has been successful Nov 06 00:00:02 x2go /usr/bin/x2gomountdirs[295124]: SSH key file has arrived: /home/serveruser/.x2go/ssh/key.cicFLi Nov 06 00:00:02 x2go /usr/bin/x2gomountdirs[295124]: SSH host key has arrived: /home/serveruser/.x2go/ssh/key.cicFLi.ident Nov 06 00:00:02 x2go /usr/bin/x2gomountdirs[295124]: executing: timeout 30 sshfs -o modules=iconv,from_code=UTF-8,to_code=UTF-8 -o idmap=user,uid=id -u,gid=id -g,default_permissions,ServerAliveInterval=300,IdentityFile=/home/serveruser/.x2go/ssh/key.cicFLi,UserKnownHostsFile=/home/serveruser/.x2go/ssh/key.cicFLi.ident "clientuser"@127.0.0.1:"/home/clientuser/Desktop" "/tmp/.x2go-serveruser/media/disk/_home_clientuser_Desktop" -p 53200 Nov 06 00:00:03 x2go /usr/bin/x2gomountdirs[295124]: WARNING: mounting of /home/clientuser/Desktop failed

on x2goserver

Nov 06 00:00:02 kweezy sshd[244865]: error: kex_exchange_identification: Connection closed by remote host Nov 06 00:00:02 kweezy sshd[244865]: Connection closed by 127.0.0.1 port 52856 Nov 06 00:00:03 kweezy sshd[244871]: Failed password for clientuser from 127.0.0.1 port 52872 ssh2 Nov 06 00:00:03 kweezy sshd[244871]: Failed password for clientuser from 127.0.0.1 port 52872 ssh2 Nov 06 00:00:03 kweezy sshd[244871]: Connection closed by authenticating user clientuser 127.0.0.1 port 52872 [preauth]

Terminal-Output of 'x2goclient --debug --libssh-debug' on x2goclient

x2go-DEBUG-../src/sshmasterconnection.cpp:2121> EOF on channel 0x7f7ed4064930; SshProcess object: 4 x2go-DEBUG-../src/sshmasterconnection.cpp:2222> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:2224> Channel closed. x2go-DEBUG-../src/sshmasterconnection.cpp:2165> EOF on channel 0x7f7ed40586c0; SshProcess object: 17 x2go-DEBUG-../src/sshmasterconnection.cpp:2222> EOF sent. x2go-DEBUG-../src/sshmasterconnection.cpp:2224> Channel closed. x2go-DEBUG-../src/sshprocess.cpp:532> SSH finished: raw output (stdout): "X2GODATABEGIN:d396bc9c-fce4-420a-9c3a-b405fddfc022\ndirs:/home/clientuser/Desktop__REVERSESSH_PORT__53200\nssh port:53200\nHost:127.0.0.1\nUser:clientuser\ninserted, timeout 30 sshfs -o modules=iconv,from_code=UTF-8,to_code=UTF-8 -o idmap=user,uid=id -u,gid=id -g,default_permissions,ServerAliveInterval=300,IdentityFile=/home/serveruser/.x2go/ssh/key.cicFLi,UserKnownHostsFile=/home/serveruser/.x2go/ssh/key.cicFLi.ident \"clientuser\"@127.0.0.1:\"/home/clientuser/Desktop\" \"/tmp/.x2go-serveruser/media/disk/_home_clientuser_Desktop\" -p 53200\nX2GODATAEND:d396bc9c-fce4-420a-9c3a-b405fddfc022\n" x2go-DEBUG-../src/sshprocess.cpp:543> SSH finished: true - "dirs:/home/clientuser/Desktop__REVERSESSH_PORT__53200\nssh port:53200\nHost:127.0.0.1\nUser:clientuser\ninserted, timeout 30 sshfs -o modules=iconv,from_code=UTF-8,to_code=UTF-8 -o idmap=user,uid=id -u,gid=id -g,default_permissions,ServerAliveInterval=300,IdentityFile=/home/serveruser/.x2go/ssh/key.cicFLi,UserKnownHostsFile=/home/serveruser/.x2go/ssh/key.cicFLi.ident \"clientuser\"@127.0.0.1:\"/home/clientuser/Desktop\" \"/tmp/.x2go-serveruser/media/disk/_home_clientuser_Desktop\" -p 53200\n" (17). x2go-DEBUG-../src/onmainwindow.cpp:8895> Post-cleanup for startX2goMount triggered. x2go-DEBUG-../src/onmainwindow.cpp:8920> Deactivating public key from "/home/clientuser/.x2go/ssh/gen/key.cicFLi.pub" again.

I then tried to reach the client from the x2goserver via SSH through the SSH tunnel that was set up:

serveruser@x2goserver:~$ ssh clientuser@127.0.0.1 -p 53200 -i /home/serveruser/.x2go/ssh/key.cicFLi Warning: Identity file /home/serveruser/.x2go/ssh/key.WEIIYY not accessible: No such file or directory. clientuser@127.0.0.1's password:

This generates a message in the x2goclient log -- so the tunnel back to the client has been set up, but the temporary SSH key is no longer available. A login with the password of clientuser is not possible.

x2go's sshd on x2goclient is running:

clientuser@x2goclient:~$ px aux | grep sshd clientuser 237626 0.0 0.0 15680 9496 pts/6 S+ Nov05 0:00 sshd: /usr/sbin/sshd -f /home/clientuser/.x2go/etc/sshd_config -h /home/clientuser/.x2go/etc/ssh_host_rsa_key -D -p 7022 [listener] 0 of 10-100 startups

The specific sshd_config looks like this:

StrictModes no UsePrivilegeSeparation no PidFile "/home/clientuser/.x2go/var/sshd.pid" AuthorizedKeysFile "/home/clientuser/.x2go/.ssh/authorized_keys" Subsystem sftp /usr/lib/openssh/sftp-server

Any idea what I could try next?

greets michel