topic Re: DHCP Server is not working - Standalone device without relay in Firewall and Security Management

DHCP Server is not working - Standalone device without relay

LM-Rafael — Sun, 05 May 2024 20:39:07 GMT

Hi everyone,

i have a issue with the dhcp service on Check Point 3600 with Gaia 81,20 JT53.

DHCP Service is configured and enabled and for 2 or 4 hours has it worked but now the clients get no address anymore.

I have already completely reset the DHCP. Without success. Another new network on a different interface does not work either.

What can I do to eliminate this error?

Thanks and BR

Rafael

Re: DHCP Server is not working - Standalone device without relay

the_rock — Sun, 05 May 2024 20:47:01 GMT

Can you see if there are any drops on port 67 or 68?

Andy

Re: DHCP Server is not working - Standalone device without relay

LM-Rafael — Sun, 05 May 2024 20:58:19 GMT

Yes, that's exactly what it was. Thank you. Everything checked except the service.

Re: DHCP Server is not working - Standalone device without relay

the_rock — Sun, 05 May 2024 20:58:37 GMT

As soon as I saw your post, I remembered we had client had this same issue recently and we realized right away there was rule missing in the inline layer for dhcp.

Best,

Andy

Re: DHCP Server is not working - Standalone device without relay

the_rock — Sun, 05 May 2024 20:59:20 GMT

Awesome job mate, glad it was an easy solution.

Excellent work!

Andy

Re: DHCP Server is not working - Standalone device without relay

the_rock — Sun, 05 May 2024 21:16:15 GMT

Just for the reference, one thing I always do is this in the log filter when any DHCP issues -> dst:255.255.255.255 AND port:67

That will show you the issue 100%

Cheers,

Andy