Pfsense as router
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 Hi! Please, excuse me my bad english and also, if the topic was covered here. I have a fibre connection that is the GW, with and IP 213.1.2.145 (all IP's aren't reals). Then a machine with 3 eth: 
 1-MACHINE:
 xl0 - LAN 192.168.1.1 (admin only).
 xl1 - WAN 212.1.2.41 gw fixed with 213.1.2.146
 xl2 - OPT1 213.1.2.146 gw fixed with 213.1.2.145Also the firewall rules are deactivated, because I only want a router only machine (no NAT). In another machine I have this: 
 2-MACHINE
 xl0 - LAN 192.168.1.2 (real LAN).
 xl1 - WAN 212.1.2.42 gw fixec with 212.1.2.41Between xl1 from first machine and xl1 from second machine, there is a (I don't know how to say this in english)… crossed utp cable, directly between interfaces. 
 If I try to ping 212.1.2.42 to 212.1.2.41, doesn't work. If I put a ethernet cable to a switch either work... If I ping in the first router machine to 213.1.2.146, also doesn't work...Well, I'm not a guru (is evident), but I think that something is escaping to me. If you could help me with any comment, url to documentation, I will be been thankful. Thank you very much. Have a nice day ;-) 
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 try to put a rule in firewall rules under each NIC, a rule that permit ICMP from xl1 to xl1 and viceversa. 
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 xl1 - WAN 212.1.2.41 gw fixed with 213.1.2.146 
 xl2 - OPT1 213.1.2.146 gw fixed with 213.1.2.145you have a loop between xl1 and xl2 
 the gateway for xl1 is wrong
 you enter a ip of xl2 but the xl2 ip is not on the xl1 site