ATT Modem DHCP and Management

Hello. I have an ATT modem where the DHCP server cannot be turned off. Somehow DHCP was answering requests and causing issues the last few weeks even though I've had this thing for years. I did find one of the wifi antennas was still enabled. Those are all disabled so maybe my DHCP issue is resolved. I've also tried adding a rule to untangle to block ports 67 and 68. Not sure it's really working because I never see anything in the firewall block report for those ports.

My modem has the standard IP address of 192.168.1.254. That is a different network than my internal network, but I can still connect to it from my internal network through untangle. I'm really not sure how that works.

My setup is pretty standard:

Internet <==> Modem (192.168.1.254) <==> Untangle <==> Internal network (192.168.xyz.0)

How am I able to get to my modem's management address at 192.168.1.254 through the untangle?

Any ideas?

Thanks
James

Is it in bridge or router mode?

Router mode. Configs on the network cards are "Addressed".

Thanks

DHCP will not pass through NAT (router). Yes, if the PCs are bypassing the Untangle via WiFi to the ATT router, it will get DHCP from ATT.

How does the management address pass through untangle?

Thanks
James

Is your internal netmask /24 - 255.255.255.0?

It is. So that's covering the third octet then. Even so, I put a rule in to drop all traffic for 192.168.1.0, yet I can still connect.

Quote:

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Originally Posted by jpifer

How does the management address pass through untangle?

Thanks
James

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It doesn't. Untangle will never see the traffic if you are using the WiFi on the ATT Router.

Quote:

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Originally Posted by jpifer

It is. So that's covering the third octet then. Even so, I put a rule in to drop all traffic for 192.168.1.0, yet I can still connect.

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Again if the WiFi of ATT is used, your traffic is not going through Untangle.

Not using the ATT WiFi. It is disabled.