Site blocking in Cisco 2900 Router.

[dm-tech]

Hello, 

One https website not working through our Cisco Router 2900 Series. If I connect directly to ISP without router that website working good. I didn't changed any configuration recently, except IOS upgrade to c2900-universalk9-mz.SPA.157-3.M8.bin. Any idea about this problem.

I am not expert in cisco devices. 

Thank you

[balaji.bandi]

i would compare the config before and after the upgrade? I do not see any reason for only 1 website you mentioned ?

what is that website, from Device are you able to resolve DNS, then should work as expected. Maybe this required wireshark packet capture.

[dm-tech]

Hi Balaji,

Thank you for your reply.

This website not working for me "https://isg.edu.sa". before this was working for me. I compared before and after IOS upgrade configuration, both looks same. 

I am not expert in cisco devices. 

Thank you

[balaji.bandi]

Are you trying to access from PC :

go to the command line, ping isg.edu.sa  - is this works ? ( same you do from router)

[dm-tech]

Hi Balaji,

Yes, I am trying to access from my PC.

From router I can ping to isg.edu.sa, but I can't able to ping from PC.

Thank you

[balaji.bandi]

Post output from router ping  isg.edu.sa 

and  post from PC  go to command line :

nslookup  isg.edu.sa 

also try fromPC  https://www.isg.edu.sa/

[dm-tech]

Problem solved....  (ISP issue).

.Thank you 

[balaji.bandi]

thanks you for the feedback and we mark as solution now.