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Install DNS2TCP on iOS

28 April 2014 by CHP

High Level Tutorial to install dns2tcp and use it on your iOS device.

Prerequisites:

Ubuntu/debian server
domain name
jailbroken iOS device

Configure your domain and create a subdomain:

Create an A record and NS record (check with your domain registrar)

example:
tunnel IN A 101.102.103.104
d2t IN NS tunnel.yourdomain.com

replace 101.102.103.104 with the ip address of your Ubuntu/debian server
replace yourdomain.com with a domain name in your control

Server configuration

Install dns2tcp:

sudo apt-get install dns2tcp

cat > /etc/dns2tcpd.conf <<EOF
listen = 101.102.103.104
port = 53
user = nobody
key = password
chroot = /tmp/dns2tcp/
domain = d2t.yourdomain.com
ressources = ssh:127.0.0.1:22
EOF

Run dns2tcp:

dns2tcpd -d 1 -f /etc/dns2tcpd.conf

Client Configuration

Install MobileTerminal, OpenSSH, and dns2tcp on your jailbroken device.

Run in MobileTerminal:

dns2tcpc -z d2t.yourdomain.com -k password -d 1 -l 2222 -r ssh 101.102.103.104
starts the dns2tcp tunnel ready to accept ssh connections on port 2222

ssh -D 1080 -p 2222 root@127.0.0.1
starts a ssh tunnel for SOCKS proxy

Configure iOS to use SOCKS proxy:

Download iOS pac file
Save it to /private/var/root/proxy.pac

Navigate to Settings > Wi-Fi > <your network> > HTTP Proxy > Auto
Enter file:///private/var/root/proxy.pac in the URL

All data on your iOS device should now be tunneling through your SOCKS proxy over DNS!

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Install DNS2TCP on iOS