topic Re: How can I run a curl from PAN OS? in Next-Generation Firewall Discussions

How can I run a curl from PAN OS?

WasfiBounni — Fri, 15 Sep 2023 01:09:40 GMT

Hi;

How can I run a curl command from PAN OS NGFW? say to some web-site. I have tried but it seems like curl is not supported.

Also, it would be great to see if the curl request can be initiated from a specific IP Address on the PAN OS NGFW?

The PAN OS version is 10.1

Kindly

Wasfi

Re: How can I run a curl from PAN OS?

akuzhuppilly — Fri, 15 Sep 2023 02:22:09 GMT

Hello @WasfiBounni

This can be done from the root, which only TAC has access to.

What is your exact requirement?

Re: How can I run a curl from PAN OS?

WasfiBounni — Fri, 15 Sep 2023 02:34:12 GMT

I have a suspicion that the web-server is black-listing the public IP address of the PAN OS. When took a packet-capture, I could see the TCP 3 way hand-shake and the TLS session setup then the client sends its first encrypted data and the server comes back with a Reset.

So, this is not your normal behaviour as the TCP session setup is completing fine. However, I suspect some sort of a WAF at the server end, thus the need to curl.

Kindly

Wasfi

Re: How can I run a curl from PAN OS?

akuzhuppilly — Fri, 15 Sep 2023 03:00:20 GMT

Unfortunately, you cannot perform a curl command from the Palo Alto Firewall. Here are a few other things you may want to consider:

Investigate further from the server side. It's better to take a packet capture from the server side for improved visibility.
Use a different IP (if available) to NAT the traffic to the specific server. This step will help determine if the issue is specific to a particular public IP.
Are you performing SSL decryption in the firewall? If so, try bypassing decryption for the specific server to check if that is the cause.
If you need the CURL output, it's best to do it from the affected client machine. If the firewall is only handling NAT, the output of CURL will likely be the same whether you do it from the firewall or the client machine.

Re: How can I run a curl from PAN OS?

WasfiBounni — Fri, 15 Sep 2023 03:38:22 GMT

Thank you Akuzhuppilly