Cisco WSA: Is it possible to use the web proxy in transparent mode without WCCP router?

Hello!

I would like to use Cisco WSA as a web proxy in a transparent manner (without any configuration of client web browsers), but I do not have a WCCP router. So, is it possible?

If so, how?

Thank you

Stephane Walker

Hi, Stéphane

The only alternative to WCCP is ACB (the policy-based routing). With a simple configuration on the router, you can redirect traffic defined also interesting by the WSA access list. On the ASO you must configure transparent mode (security-> Web Proxy Services-> the settings of-> Mode Proxy: Transparent). You should also make sure proxy listens on port 80 and HTTPS proxy is enabled (on port 443) If you want to redirect HTTPS traffic as well.

Cisco router configuration example

!
access-list 110 permit tcp any any eq www
!
proxy-redirect allowed route map 10
corresponds to the IP 110
set ip next-hop xxx.xxx.xxx.xxx
!
interface ethernet0/1
proxy-redirect IP policy route map
!

xxx.xxx.xxx.xxx is the IP address of the proxy in such a case and access-list 110 sets web traffic (HTTP-TCP/80) also interesting.

The biggest drawback of this solution is the lack of troubleshooting. If the proxy will go down because some reason router will keep redirecting traffic causing the cutoff of internet access.

Cisco routers out material should also have an option to configure policy routing based.

/ Artur

PS. It is not possible to place the WSA online between the clients and the internet.

Tags: Cisco Security

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