Puzzled by entry in routing table



  • I recently switched my LTE modem (failover WAN) from routing to bridging mode. When it was in routing (default) mode, I had was accessing it via a 192.168.5.x scheme. Post switch to bridge mode, the IP of the modem is 10.42.x.x

    Everything is working fine but I am a bit baffled by this entry in the pfsense routing table:
    192.168.5.1 10.42.234.1 UGHS 0 1500 em2

    I should not have anything using/pointing to/referencing 192.168.5.x anymore. I've checked all rules, servers (openvpn, etc.) but can't locate anything. This is not causing any issues and everything is working as expected but I am still puzzled by the presence of this entry.

    Moreover, when I ping 192.168.5.1, I get a response but there's no host with that IP anywhere!

    PING 192.168.5.1 (192.168.5.1): 56 data bytes
    64 bytes from 192.168.5.1: icmp_seq=0 ttl=64 time=1.088 ms
    64 bytes from 192.168.5.1: icmp_seq=1 ttl=64 time=0.977 ms
    64 bytes from 192.168.5.1: icmp_seq=2 ttl=64 time=0.607 ms
    

    traceroute shows 1 hop:

    traceroute to 192.168.5.1 (192.168.5.1), 64 hops max, 40 byte packets
     1  192.168.5.1 (192.168.5.1)  1.141 ms  1.064 ms  0.498 ms
    

    UGHS suggests manually added entry, but from where?



  • Hello!

    My netgear lb1120 pushes that route to pfsense through dhcp when you put it in bridge mode. I think it is just a courtesy route to help get to the admin interface.

    Shell Output - clog /var/log/dhcpd.log | grep "192.168.5.1"

    Jun 12 23:13:43 pfSense dhclient: New Static Routes (mvneta0.4092): 192.168.5.1 100.101.128.1

    John



  • @serbus said in Puzzled by entry in routing table:

    Hello!

    My netgear lb1120 pushes that route to pfsense through dhcp when you put it in bridge mode. I think it is just a courtesy route to help get to the admin interface.

    Shell Output - clog /var/log/dhcpd.log | grep "192.168.5.1"

    Jun 12 23:13:43 pfSense dhclient: New Static Routes (mvneta0.4092): 192.168.5.1 100.101.128.1

    John

    Thanks! Yeah, I arrived at the same conclusion after I did more research.


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