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Date: Sat, 27 Jul 2002 18:25:06 +0100
From: =?iso-8859-1?Q?Colm_MacC=E1rthaigh?= <colmmacc@redbrick.dcu.ie>
To: Irish Linux Users Group <ilug@linux.ie>
Subject: Re: [ILUG] putty + proxy goodness
Message-Id: <20020727182506.A28835@prodigy.Redbrick.DCU.IE>
References: <20020727140613.GA32647@skynet.ie>
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Sat, Jul 27, 2002 at 03:06:15PM +0100
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On Sat, Jul 27, 2002 at 03:06:15PM +0100, Stephen Shirley wrote:
> Mornin' all,
> I'm running one of the development snapshots of putty, and i just
> noticed a very handy new feature: builtin proxy support. This means that
> people like me can connect to external hosts using ssh via a http proxy.
sort of. Squid, and most other good http proxies won't let you connect
to any other destination port other than 443 (by default). So the sshd
has to be listening on port 443. PuTTy's proxy support is a bit flaky
right now, the raw connects are a bit flaky aswell, I can't get them
to work with certain revisions of IOS becuase they use different prompts
and success strings, gah! I havnt played with the SOCKS proxy support
much yet, but it's there.
If you're trying to SSH through a http proxy, use netcat :)
PuTTy's proxy stuff will take another few weeks to get stable, and
currently it won't send keepalives, so if you go afk expect your
session to get killed by the proxy. Netcat send keepalives
which prevent this :)
#
# call as http_proxy_tunnel host port
#
function http_proxy_tunnel()
{
mkfifo in.fifo
( echo CONNECT $1:$2 HTTP/1.1
echo HOST: $1:$2
echo HTTP/1.1
echo
cat in.fifo ) | nc myproxy 3128 | (read ; read ; nc -lp <localport> > in.fifo )
}
course that assumes you have bash, I use cygwin, but the above should be
doable natively, then again if you have cygwin, use OpenSSH and it's
excellently configurable proxycmd :)
--
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