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information-security/Readme.md

Created November 4, 2022 08:18
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Route traffic of multiple IPs through secondary gateway (e.g. ppp connections) on Ubuntu 22
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Readme.md

Assumption

We assume that a VPN connection is already setup and a ppp0 interface is up and running.

Routing modifications

Run following commands as root user:

cd /etc/iproute2
cp rt_tables rt_tables.orig

echo "1 vpn" >> /etc/iproute2/rt_tables

ip route add default dev ppp0 table vpn

ip rule add to 44.205.64.0/24 table vpn #Docker
ip rule add to 34.205.13.0/24 table vpn # Docker
ip rule add to 3.216.34.0/24 table vpn # Docker
ip rule add to 138.197.224.240 table vpn # dist.libuv.org

Top 3 IP ranges of the above examples are for Docker to pull images through VPN connection. Docker Hub is hosted on AWS therefore these IPs might change frequently.

  • Please note that these changes are not persistent and will be lost upon system reboot.
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