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Dns2tcp

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Dns2tcp is a tool for relaying TCP connections over DNS. There is only a simple identification mecanism but no encryption : DNS encapsulation must be considered as an unsecure and anonymous transport layer. Resources should be public external services like ssh, ssltunnel ...

Examples

Client:

View list of available connection.
 $ dns2tcpc -z dns2tcp.hsc.fr -k <my-key><dns_server>
Available connection(s) :
ssh-gw
ssh6-home
ssl-tunnel
$
Line based connection to a remote ssl-tunnel host :
 $ dns2tcpc -r ssl-tunnel -l 4430 -k <my-key> -z dns2tcp._hsc.fr <dns_server>
listening on port 4430
...
File configuration :
 $ cat >~/.dns2tcprc <<EOF

domain = dns2tcp.hsc.fr
resource = ssl-tunnel
local_port = 4430
debug_level = 1
key = whateveryouwant
server = the_dns_server # or scan /etc/resolv.conf
EOF
$ dns2tcpc

Server :

File configuration :
 $ cat >~/.dns2tcpdrc <<EOF

listen = x.x.x.x
port = 53
user = nobody
key = whateveryouwant
chroot = /var/empty/dns2tcp/
domain = dns2tcp.hsc.fr
resources = ssh:127.0.0.1:22 , smtp:127.0.0.1:25,
pop3:10.0.0.1:110, ssh2:[fe80::1664]:22

EOF
$ ./dns2tcpd -F -d 1
from https://github.com/alex-sector/dns2tcp

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