dnstunnel
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splitbrain
A Perl script to run a DNS tunneling server
====== Installation ======
These scripts provide a way to setup a DNS Tunnel. They are based on Dan Kaminski's OzymanDNS scripts.
Read more at http://www.splitbrain.org/blog/2008-11/02-dns_tunneling_made_simple
===== DNS Side =====
Delegate a subdomain nameserver to the server that will run dnstunneld like this:
server.example.com. IN NS ns.example.com. ns.example.com. IN A 123.123.123.123
Note: You can not use a server that has already running a nameserver on the external interface, because we need to use port 53.
===== Server Side =====
- put the dnstunneld* scripts to /opt/dnstunnel
- edit the variables in /opt/dnstunnel/dnstunneld.wrapper
- link /opt/dnstunnel/dnstunneld.init to /etc/init.d/dnstunneld
- enable the init script in the apropriate runlevels
- run /etc/init.d/dnstunneld start
===== Client Side =====
- copy the dnstunnelc script somewhere in your PATH (eg. /usr/local/bin)
- Setup an SSH tunnel using the script as Proxy:
ssh -C -o ProxyCommand="dnstunnel sshdns.server.example.com" user@localhost
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