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sunknudsen
Asked: 2020-10-31 04:54:50 +0800 CST

How to bind strongSwan to specific IP on VPS with multiple IPs?

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I would like client traffic to show publicly as originating from that specific IP (which could be a secondary IP assigned to the same network interface as primary).

iface eth0 inet static
    address 167.99.179.140/24
    gateway 167.99.179.1
iface eth0 inet static
    address 167.99.179.141/24
ip strongswan

1 Answers

  1. Figured it out!

    I had to replace -A POSTROUTING -s 10.0.2.0/24 -o eth0 -j MASQUERADE by -A POSTROUTING -s 10.0.2.0/24 -o eth0 -j SNAT --to-source 167.99.179.141 in /etc/iptables/rules.v4.

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