Re: svn://svn.zope.org is unreachable

On Fri, Jun 20, 2014 at 08:06:45AM -0400, Jim Fulton wrote:
> On Fri, Jun 20, 2014 at 8:03 AM, Marius Gedminas <[email protected]> wrote:
> > For the last several days my svnsync hasn't been able to talk to
> > svn.zope.org using the anonymous svn protocol.  I can reproduce this
> > locally:
> >
> >   $ svn ls svn://svn.zope.org/repos/main/zopetoolkit/trunk
> >   svn: E210002: Unable to connect to a repository at URL 'svn://svn.zope.org/repos/main/zopetoolkit/trunk'
> >   svn: E210002: Network connection closed unexpectedly
> >
> > SSH access works fine, and so does ViewVC.
> 
> That's wierd.  I just tried it and it worked fine for me.

Oh, that's curious!  It works for me if I ssh into my home server, but
fails if I try this in my office network.

Here's tcpdump on the external office router interface while I was
attempting the svn ls:

  # tcpdump -i eth0.2 -n tcp and host 23.22.8.13
  tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
  listening on eth0.2, link-type EN10MB (Ethernet), capture size 65535 bytes
  13:09:22.904762 IP 88.119.11.77.60077 > 23.22.8.13.3690: Flags [S], seq 1125812149, win 29200, options [mss 1460,sackOK,TS val 9238029 ecr 0,nop,wscale 7], length 0
  13:09:23.022896 IP 23.22.8.13.3690 > 88.119.11.77.60077: Flags [S.], seq 2779972273, ack 1125812150, win 14480, options [mss 1460,sackOK,TS val 4279898211 ecr 9238029,nop,wscale 7], length 0
  13:09:23.024041 IP 88.119.11.77.60077 > 23.22.8.13.3690: Flags [.], ack 1, win 229, options [nop,nop,TS val 9238059 ecr 4279898211], length 0
  13:09:23.142519 IP 23.22.8.13.3690 > 88.119.11.77.60077: Flags [F.], seq 1, ack 1, win 114, options [nop,nop,TS val 4279898331 ecr 9238059], length 0
  13:09:23.144309 IP 88.119.11.77.60077 > 23.22.8.13.3690: Flags [F.], seq 1, ack 2, win 229, options [nop,nop,TS val 9238089 ecr 4279898331], length 0
  13:09:23.262674 IP 23.22.8.13.3690 > 88.119.11.77.60077: Flags [.], ack 2, win 114, options [nop,nop,TS val 4279898451 ecr 9238089], length 0

All 0-length packets.  svn.zope.org is initiating the FIN dance right
after my three-way handshake is complete.  I've no idea why...

Marius Gedminas
-- 
http://pov.lt/ -- Zope 3/BlueBream consulting and development

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