Hi -- I am referring to the following (simplified) setup:
[hostA /ix0 / 2001:dead::1 / 1.2.3.4] <===== IPsec tunnel =====> [hostB / ix0 / 2001:beef::10 / 10.20.30.40] | | | | [jail1 / bridge0 / fd00:a::1 / 10.1.1.1] [jail1 / bridge0 / fd00:b::2 / 10.2.2.2] All my jails are VNET jails, that use the bridge0 (epair) device. Thus, all IPv4 and IPv6 addresses of my local networks an A and B are bound to the bridge0 interface! But, the IPsec tunnel (via racoon) is anchored at public IPv4 addresses on ix0 at both hosts. Task: route all local traffic from hostA to hostB via the tunnel. Working: IPv6 traffic is running fine, meaning, that I can reach every jail from every host. That has been working for years. Issue: I recently wanted to extend my setup to local IPv4 addresses of my jails, and failed miserably. Configuration (shown for hostA, only): setkey.conf # hostA hostB hostA hostB spdadd fd00:a::/64 fd00:b::/64 any -P out ipsec esp/tunnel/1.2.3.4-10.20.30.40/require; spdadd fd00:a::/64 2001:beef::/56 any -P out ipsec esp/tunnel/1.2.3.4-10.20.30.40/require; spdadd 2001:dead::/56 fd00:b::/64 any -P out ipsec esp/tunnel/1.2.3.4-10.20.30.40/require; # hostB hostA hostB hostA spdadd fd00:b::/64 fd00:a::/64 any -P in ipsec esp/tunnel/10.20.30.40-1.2.3.4/require; spdadd fd00:b::/64 2001:dead::/56 any -P in ipsec esp/tunnel/10.20.30.40-1.2.3.4/require; spdadd 2001:beef::/56 fd00:a::/64 any -P in ipsec esp/tunnel/10.20.30.40-1.2.3.4/require; # hostA hostB hostA hostB spdadd 10.1.1.0/24 10.2.2.0/24 any -P out ipsec esp/tunnel/1.2.3.4-10.20.30.40/require; spdadd 10.1.1.0/24 10.20.30.40 any -P out ipsec esp/tunnel/1.2.3.4-10.20.30.40/require; spdadd 1.2.3.4 10.2.2.0/24 any -P out ipsec esp/tunnel/1.2.3.4-10.20.30.40/require; # hostB hostA hostB hostA spdadd 10.2.2.0/24 10.1.1.0/24 any -P in ipsec esp/tunnel/10.20.30.40-1.2.3.4/require; spdadd 10.2.2.0/24 1.2.3.4 any -P in ipsec esp/tunnel/10.20.30.40-1.2.3.4/require; spdadd 10.20.30.40 10.1.1.0/24 any -P in ipsec esp/tunnel/10.20.30.40-1.2.3.4/require; There is no specific routing regarding the tunnel defined. All should be done by this spdadd's. Achieved sofar: #) I can reach each jail at the other site from the host. #) Allowing arpproxy_all="YES" will satisfy ARP (MACs from opposite VNET jails will become assigned). I do not know if that is needed, but now ping from jails to the opposite jails will at least start to send ICMP packages. Unsolved issue: I cannot reach opposite jails from another host's jail; e.g.: ping 10.20.30.40 in jail1@hostA will not work. Observations so far: #) tcpdump shows for "ping 10.2.2.2 in jail1@hostA" ICMP traffic at the bridge0 at hostA: IP 10.1.1.1 > 10.2.2.2: ICMP echo request, id 20099, seq 0, length 64 and at bridge0 at hostB: IP 10.1.1.1 > 10.2.2.2: ICMP echo request, id 15233, seq 6, length 64 IP 10.2.2.2 > 10.1.1.1: ICMP echo reply, id 15233, seq 6, length 64 Hmm: hostA doesn't get an echo replay, although hostB did send one. #) tcpdump shows for "ping 10.2.2.2 at hostA" *no* ICMP traffic at hostA@bridge0 or hostA@ix0 but ICMP traffic at hostB@bridge0: IP 1.2.3.4 > 10.2.2.2: ICMP echo request, id 60543, seq 0, length 64 IP 10.2.2.2 > 1.2.3.4: ICMP echo reply, id 60543, seq 0, length 64 Hmm: it's working. #) It looks to me as if the tunnel does not recognise "spdadd 10.1.1.0/24 10.2.2.0/24" and vice versa settings because those IPs are bound to the bridge. #) Whenever an IP bound to ix0 is involved (host to jail) the corresponding spdadd parts are recognised. #) adding static routes like "add route 10.2.2.0/24 1.2.3.4" and alike do not solve my issue. Questions: #) Is this an issue with IPsec/racoon? #) Is this a routing issue? #) Why does IPv6 address space work (identical configuration regarding jails, firewalling, routing, et al.) #) Any other idea? Sorry for this lengthy post, and any feedback is highly welcome, Michael _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"