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There's another post on this forum detailing the same issue. It appears the firewall rules are not being created automatically, even after a reboot or reload of the firewall rules.
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25.1, 25.4 Production Series / Re: dnsmasq DHCP on 25.1.7: IPv6 works, but no IPv4 addresses
May 20, 2025, 04:09:18 AM #2
25.1, 25.4 Production Series / Re: dnsmasq DHCP on 25.1.7: IPv6 works, but no IPv4 addresses
May 19, 2025, 11:17:18 PM
I am having a similar problem on my OPNsense setup when attempting to switch to dnsmasq DHCP. I have followed the steps in the documentation, complete with integration into Unbound, however, I am unable to get an IPv4 address. I am seeing "Default Deny/State Violation Rule" blocks in live firewall logs for DHCP traffic. If I disable dnsmasq and switch back to ISC, it works immediately.
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