Welcome to Open Source Software Mirror - hosted by University of Ruse

Welcome to mirrors.uni-ruse.bg, a free service hosted by the University of Ruse

PuTTY bug x11-proxy-crash

This is a mirror. Follow this link to find the primary PuTTY web site.

summary: Proxy + SSH + X11 forwarding fails and/or crashes
class: bug: This is clearly an actual problem we want fixed.
priority: high: This should be fixed in the next release.
present-in: 0.53 0.53b 2002-09-29 2002-03-25 2002-12-11
fixed-in: 2002-12-19 8304f4e0dcd9555eb8dceb0402f1faa2738c2777 (0.54)

Opening a forwarded X11 connection over an SSH connection that's using a proxy fails to work. (Versions of PuTTY before 2002-10-11 may also crash.)

I (JTN) can reproduce this with HTTP proxying.

Appears to be occur regardless of whether there's an X server to connect to. When I do have an X server running, it doesn't appear to see any traffic when attempting X forwarding through a proxy.

Symptom is something like the following:

X connection to chiark:27.0 broken (explicit kill or server shutdown)

PuTTY behaves as though the X connection is being opened then slammed shut:

2002-10-17 18:07:24     Received X11 connect request
2002-10-17 18:07:24     opening X11 forward connection succeeded
2002-10-17 18:07:24     Opened X11 forward channel
2002-10-17 18:07:24     Forwarded X11 connection terminated

A workaround is to add `localhost,127.0.0.1' to the proxy exclusions. This implies that our proxying code is being over-enthusiastic and needs reining in.

If you want to comment on this web site, see the Feedback page.

Audit trail for this bug.

(last revision of this bug record was at 2016-12-27 11:40:22 +0000)

Developed and supported by the Centre for Information and Computing Technologies