recently I have upgraded Cisco 871 router with IOS version 12.4(20). From upgrade on DHCP server on router is not working if Zone Based Firewall is enabled. Does any body knows what rule I have to insert into firewall to allow DHCP traffic?
Thank you and kind regards,M
I have the same problem. It's very frustrating to say the least. Here is what I have to do to fix it...
Once you have the firewall created go to advanced. If you created it using the SDM wizard then there should be the top zone policy - sdm-permit-icmpreply (self to out-zone). Insert a rule. The rule should be
service name - I named it "dhcp-self-to-out"
services to add - bootps
action - Permit ACL
That should fix it.
Now to try and get PPTP to work. Having issues with GRE being allowed through.
I'm not at all impressed with the new zone based firewall to say the least.
I upgraded the image on my 871 from 12.4.15 to 12.4.20 and my router completely stopped working...seems to happen everytime I upgrade my IOS.
Anyone know how to go back to the ACL based IOS firewall in the higher 12.4 releases? I really have not experienced the "simplicity" of the zone based firewall, and I am not a novice.
Rate this Post if it does also fix your problem. It will help others with the same problem find quickly resolve their same issue as well.
Thanks and good luck.