OPNsense Forum

Archive => 22.7 Legacy Series => Topic started by: peterwkc on September 01, 2022, 10:25:21 am

Title: Firewall Block Log
Post by: peterwkc on September 01, 2022, 10:25:21 am

Dear all, I have block log like something below

rule 0.0.0.0:68   255.255.255.255:67   udp   Block bogon IPv4 networks from Intel_Igb1_LAN


Should i need to worry? What does this rule doing?

Title: Re: Firewall Block Log
Post by: peterwkc on September 14, 2022, 04:56:10 am

Anyone here willing to help?

Title: Re: Firewall Block Log
Post by: Fright on September 14, 2022, 12:48:59 pm

its DHCP client DHCPDISCOVER request

Quote

What does this rule doing?

as a " Block bogon networks" option help message says
When set, this option blocks traffic from IP addresses that are reserved (but not RFC 1918) or not yet assigned by IANA. Bogons are prefixes that should never appear in the Internet routing table, and obviously should not appear as the source address in any packets you receive.

Title: Re: Firewall Block Log
Post by: peterwkc on March 11, 2023, 02:57:03 am

Why it will trigger this kind of packet into my firewall? What circumstances trigger it?