Router is Missing from traceroute Output

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When traceroute is run from LAN to a destination on the Internet, the router itself may be missing from the traceroute output depending on the firewall configuration.

This happens on Multi-WAN due to the way that route-to and reply-to work. pf(4) policy routing(route-to/reply-to) does not decrease the IP TTL when forwarding packets, so the router does not appear as a hop.

This may also happen with IPsec due to the way IPsec traffic is handled in the kernel. The traffic is not "routed" in a traditional sense.

This behavior may change in future versions of pfSense, see here: http://redmine.pfsense.org/issues/932