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Forwarder

Lightweight UDP forwarder and UDP over ICMP software
Mostly used it to combat DPI when using popular VPN protocols such as Wireguard and OpenVPN

Usage

Simply forwarding single local port to another:

forwarder -l 0.0.0.0:1001 -r 127.0.0.1:1002

Forwarding UDP and encrypting packets via XOR encryption
(i'm using forwarder on top of other protocols such as Wireguard that already has strong encryption so the xor is only for confusing DPI):

forwarder -l 0.0.0.0:1001 -r 127.0.0.1:1050 -p some_secret

now, packets delivered to port 1050 are also encrypted via a secret so you need also another forwarder to decrypt packets and forward it to the actual port (1002):

forwarder -l 127.0.0.1:1050 -r 127.0.0.1:1002 -p some_secret

Screenshot_2024-01-19_1705682795

Forwarding UDP packets over ICMP:

forwarder -l 0.0.0.0:1001/udp -r 127.0.0.1:1050/icmp
forwarder -l 127.0.0.1:1050/icmp -r 127.0.0.1:1002/udp

Screenshot_2024-01-19_1705683004

Warning

UDP over ICMP currently may not work behind NAT or NAPT, because forwarder doesn't try to simulate real icmp handshake (request, reply) and only sends echo request and also the sequence and id of icmp packet is used as source and destination port to avoid further MTU issues, also i'm using forwarder only on servers so the main reason for this behavior is that.