A common way to establish an IPsec tunnel on Linux is to use an IKE daemon, like the one from the strongSwan project, with a minimal configuration:1 conn V2-1 left = 2001:db8:1::1 leftsubnet = 2001:db8:a1::/64 right = 2001:db8:2::1 rightsubnet = 2001:db8:a2::/64 authby = psk auto = route The same configuration can be used on both sides. Each side will figure out if it is âleftâ or âright.â The IPs
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