openssh unix dev - Sep 2001 - Protocol 2 remote port forwarding

Hi all,

I'm using openssh-2.9p2 on Solaris 2.8.  I can get remote port forwarding to
work using the -R flag, but only with ssh protocol 1 not ssh protocol 2.

I've read that remote forwarding protocol 2 was not supported in earlier
versions of openssh, but I'm wondering if this is still the case.  Jarno
Huuskonen [Jarno.Huuskonen at uku.fi], posted a patch in 2000 to add support
for -R in protocol 2.

Is -R supported in portocol 2 in openssh?

If so, is any special configuation needed?

Thanks!

--PK

The -R is broken in 2.9p2, fixed in the current CVS tree.  -L works
properly.  Here is the patch against 2.9p2 (posted to the list some time
back).

diff -u channels.c.orig channels.c
--- channels.c.orig	Wed Jun 13 14:18:05 2001
+++ channels.c	Thu Aug  2 20:26:25 2001
@@ -773,8 +773,9 @@
 
 		rtype = (c->type == SSH_CHANNEL_RPORT_LISTENER) ?
 		    "forwarded-tcpip" : "direct-tcpip";
-		nextstate = (c->host_port == 0) ? SSH_CHANNEL_DYNAMIC :
-		    SSH_CHANNEL_OPENING;
+		nextstate = (c->host_port == 0 &&
+		    c->type != SSH_CHANNEL_RPORT_LISTENER) ?
+		    SSH_CHANNEL_DYNAMIC : SSH_CHANNEL_OPENING;
 
 		addrlen = sizeof(addr);
 		newsock = accept(c->sock, &addr, &addrlen);

---begin quoted text---
> Delivered-To: openssh-unix-dev-list-93873 at shitei.mindrot.org
> From: Peter Kocks <pkocks at portal.com>
> To: "'openssh-unix-dev at mindrot.org'"
<openssh-unix-dev at mindrot.org>
> Subject: Protocol 2 remote port forwarding
> Date: Tue, 25 Sep 2001 17:58:48 -0700
> X-Mailer: Internet Mail Service (5.5.2650.21)
> 
> Hi all,
> 
> I'm using openssh-2.9p2 on Solaris 2.8.  I can get remote port
forwarding to
> work using the -R flag, but only with ssh protocol 1 not ssh protocol 2.
> 
> I've read that remote forwarding protocol 2 was not supported in
earlier
> versions of openssh, but I'm wondering if this is still the case. 
Jarno
> Huuskonen [Jarno.Huuskonen at uku.fi], posted a patch in 2000 to add
support
> for -R in protocol 2.
> 
> Is -R supported in portocol 2 in openssh?
> 
> If so, is any special configuation needed?
> 
> Thanks!
> 
> --PK
---end quoted text---

-- 
    Lee Eakin - leakin at dfw.nostrum.com
 
Wyszkowski's Second Law:
  Anything can be made to work if you fiddle with it long enough.