[Pauldotcom] ICMP tunneling through firewalls
Gerardo Iglesias Galvan
iglesiasg at gmail.com
Wed Dec 22 23:44:06 UTC 2010
I've successfully used ptunnel and ssh (as a SOCKS server) to tunnel
out different kind of traffic (and high loads). The client and server
were in different networks and there were no problems at all. What's
the problem you're facing?
On Wed, Dec 22, 2010 at 1:43 PM, David Porcello
<DPorcello at vermontmutual.com> wrote:
> Ptunnel & ICMPTX work fine when the client/server are within the same local subnet, but most firewalls permit only one ICMP echo reply per ICMP echo request. Not a problem for exchanging a few chars through netcat, but anything that can't fit within a single ICMP payload (such as shoveling /bin/bash or ssh tunneling) gets dropped.
> Has anyone found a workaround for this? Are there any extremely lightweight shells that may work under these conditions?
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