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New Member

Gmail and Yahoo not accessible after zbfw implementation

Hi,

I have implemented zbfw on Cisco 1800 series router. But after the implementation I could see that Gmail/Yahoo is not loading.Please could some one look into my config and advise. I can access all other websites without any issues.

class-map type inspect match-all ICMP
 match protocol icmp
class-map type inspect match-all SMTP
 match protocol smtp
class-map type inspect match-all HTTP-ACCESS
 match protocol http
class-map type inspect match-all UDP
 match protocol udp
class-map type inspect match-all HTTPs-ACCESS
 match protocol https
class-map type inspect match-all TCP
 match protocol tcp
class-map type inspect match-all DNS
 match protocol dns
class-map type inspect match-all POP3
 match protocol pop3
!
!
policy-map type inspect in-to-out-policy
 class type inspect HTTPs-ACCESS
  pass
 class type inspect HTTP-ACCESS
  inspect
 class type inspect UDP
  inspect
 class type inspect TCP
  inspect
 class type inspect DNS
  inspect
 class type inspect SMTP
  inspect
 class type inspect POP3
  inspect
 class type inspect ICMP
  inspect
 class class-default
policy-map type inspect out-to-in-policy
 class class-default
  drop
!
zone security inside
zone security outside
zone-pair security in-to-out source inside destination outside
 service-policy type inspect in-to-out-policy
zone-pair security out-to-in source outside destination inside
 service-policy type inspect out-to-in-policy

Many thanks,

Regards, Tony http://yadhutony.blogspot.com
4 REPLIES
Cisco Employee

Hi,I think the configuration

Hi,

I think the configuration looks good. Would you be able to try to enable logging for dropped packets and see if you see any packets being dropped ?

ip inspect log drop-pkt

Also , as a test , try to change class class-default in policy-map type inspect in-to-out-policy and see if this makes it work ?

Thanks and Regards,

Vibhor Amrodia

New Member

Hi Vibhor,Thanks for your

Hi Vibhor,

Thanks for your reply. I doubt whether the issue is due to the IOS version 12.3(8r)YH12 which is loaded in our router as I could see that Cisco introduced zbfw in 12.4(6)T ?

I will try ip inspect log drop-pkt and will let you know the outcome.

Many thanks,

Regards, Tony http://yadhutony.blogspot.com

HiI think the problem is

Hi

I think the problem is:

policy-map type inspect in-to-out-policy
 class type inspect HTTPs-ACCESS
  pass

The HTTPS traffic is allowed out, but the return traffic will be blocked. Gmail is HTTPS, but I would think that any HTTPS website would not work.

New Member

Hi Thanks for your reply

Hi 

Thanks for your reply.

Sorry, I have put the pass command only for testing and wrongly copied the config with that. The actual configuration contain inspect for HTTPS. It is quite strange that all other HTTPS websites are working without any issue.

We are running version 12.3(8r)YH12 . Would this be the issue?

Appreciate your help on this.

Regards,

Regards, Tony http://yadhutony.blogspot.com
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