#922 - Avoiding X2GO Servers all using the same SSH_PORT - what conflicts when try to connect to different servers from one windows terminal (multiple sessions of x2go client)

X2Go Bug report logs - #922
Avoiding X2GO Servers all using the same SSH_PORT - what conflicts when try to connect to different servers from one windows terminal (multiple sessions of x2go client)

Reported by: Robert Nowotny <rnowotny@rotek.at>

Date: Mon, 17 Aug 2015 14:05:02 UTC

Severity: normal

Tags: pending

Found in version 4.0.1.19

Fixed in version 4.0.1.20

Done: X2Go Release Manager <git-admin@x2go.org>

Bug is archived. No further changes may be made.

X-Loop: owner@bugs.x2go.org
Subject: Bug#922: Fwd: [X2Go-Dev] X2Go Server contains some IPv4/non-IPv6 logic for creating ports.
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Forwarding this to the bugtracker so it doesn't get lost ... -------- Weitergeleitete Nachricht -------- Betreff: [X2Go-Dev] X2Go Server contains some IPv4/non-IPv6 logic for creating ports. Datum: Wed, 30 Dec 2015 09:21:20 +0000 Von: Mike Gabriel <mike.gabriel@das-netzwerkteam.de> Organisation: DAS-NETZWERKTEAM An: x2go-dev@lists.x2go.org Hi guys, On So 23 Aug 2015 23:10:59 CEST, git-admin wrote: > This is an automated email from the git hooks/post-receive script. > > x2go pushed a commit to branch master > in repository x2goserver. > > commit bfe3ba761c1d3e9143285ca17edc87ac763ce35d > Author: Mihai Moldovan <ionic@ionic.de> > Date: Sun Aug 23 23:08:45 2015 +0200 > > x2goserver/bin/x2gostartagent: changes to Robert Nowotny's > SSH_PORT patch. Fixes: #922. > > Use default outgoing interface to determine IP address. > > Use the whole range of ${RANDOM}'s pool. > > Seed it for good measure. > > Change the default method to randomization instead of IP-based > initialization. > > If IP-based initialization was requested but the default outgoing IP > address unavailable, fall back to randomization. > Haven't looked at X2Go Server code for a while... Today I found the below... > +# Get server IP address. > +get_server_ip_address() { > + # The provided IP address should be outside of any local network. > + # We are only interested in how the kernel would try to reach the > + # non-local IP address specified here. It is not actually contacted > + # in any way. > + typeset ip_output="$(ip route get 8.8.8.8)" > + > + # Remove newlines. > + ip_output="${ip_output//$'\n'}" > + > + # Fetch source address. > + typeset src_address="$(grep -oe > 'src[[:space:]]\{1,\}$\([[:digit:]]\{1,3\}\.$\{3\}[[:digit:]]\{1,3\}\)' > <<< "${ip_output}" | sed -e 's/src[[:space:]]\{1,\}//')" > + > + if [ -n "${src_address}" ]; then > + printf "${src_address}" > + return "0" > + fi > + > + return "1" > +} Has anyone of you ever heard of IPv6? And has anyone ever seen setups where the IPv6 traffic is routed via a different interface compared to IPv4 traffic? Furthermore, within the last years, I never had any problems with server-side ports being the same on different servers. I mostly connect through PyHoca. So if there is a problem in X2Go Client regarding server-side SSH tunnel ports, why--the hack--do you fix that in X2Go Server? If the port allocation is a problem at all, it certainly is a problem that requires fixing in X2Go Client, not X2Go Server. Please consider reverting this flawed patch!!! Scratching my head and wondering... Mike -- DAS-NETZWERKTEAM mike gabriel, herweg 7, 24357 fleckeby fon: +49 (1520) 1976 148 GnuPG Key ID 0x25771B31 mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de freeBusy: https://mail.das-netzwerkteam.de/mailxchange/kronolith/fb.php?u=m.gabriel%40das-netzwerkteam.de

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X2Go Bug report logs - #922 Avoiding X2GO Servers all using the same SSH_PORT - what conflicts when try to connect to different servers from one windows terminal (multiple sessions of x2go client)

X2Go Bug report logs - #922
Avoiding X2GO Servers all using the same SSH_PORT - what conflicts when try to connect to different servers from one windows terminal (multiple sessions of x2go client)