topic Hi I need a Help in Network Security

Hi I need a Help

tinmk — Mon, 11 Mar 2019 23:07:51 GMT

HI, I have a question. First off all my design is My ISP is conected to router > Cisco ASA5520 > L3 Switch and to LAN.Every configuration is done at the Cisco ASA. Now my question is i have some public IPs. I have nated some of the public IPs and it is working fine. But I cant ping the nated public IPs from outside the network or from internet. I need the public IPs to be get pinged from the Internet. Before it was working and suddenly now the IPs are not get pinged.

Please give a solution.

Hi I need a Help

varrao — Wed, 16 May 2012 14:50:08 GMT

Hi Tino,

The best I can suggest is, take captures on the ASA outside interface for the ping packets, checvk whether the packets are reaching the firewall or not. If no, contact your ISP.

Also check if you have icmp allowed on your ASA, check the ACL that you have applied on the outside interface, if its not there then you can add an icmp any any ACL on it.

Thanks,
Varun Rao
Security Team,
Cisco TAC

Hi I need a Help

tinmk — Wed, 16 May 2012 14:59:40 GMT

Hi thanks for the suggestion, I have checked the packets, they are reaching the firewall. I added a ACL ICMP any any and it is not working...

Hi I need a Help

varrao — Wed, 16 May 2012 15:24:29 GMT

Hi Tino,

Apply the same captures on the inside interface as well to check if they are getting any replies back from the client..

this will help you:

https://supportforums.cisco.com/docs/DOC-17814

Thanks,
Varun Rao
Security Team,
Cisco TAC