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Barracuda CloudGen Firewall

Using Application Control Features with HTTP(S) Proxies

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You can use Application Control features with the internal HTTP Proxy service and external proxies. Depending on what type of proxy is used, Application Control might be limited or require additional configuration.

Proxy Type HTTP Proxy Service:
Forward Proxy on ports 3128 and 8080

HTTP Proxy Service:
Transparent Proxy

External HTTP(S) Proxy External HTTP + HTTPS Proxies
Application Control Yes Yes Yes Yes
Sub-application Detection No Yes (with an access rule for HTTPS) Yes Yes
SSL Inspection Yes (via HTTP Proxy Service) Yes (with an access rule for HTTPS) Yes Yes
Virus Scanning
Yes (via HTTP Proxy Service) Yes (via HTTP Proxy Service) Yes Yes
URL Filter Yes (via HTTP Proxy Service or Firewall Service) Yes (via HTTP Proxy Service or Firewall Service) Yes Yes
ATP Yes Yes Yes Yes
Application Based Provider Selection No No - -
Safe Search No No No No
Google Accounts Filtering No No No No
File Content Filtering No No No No
User Agent Filtering Yes Yes Yes Yes
Response Messages
No No Yes Yes

HTTP Proxy Service (Forward Proxy)

When the client is configured to use the HTTP Proxy service for both HTTP and HTTPS, Application Control can be used to detect applications for HTTP connections. Clients contact the HTTP Proxy service directly on port 3128 or 8080 for both HTTP and HTTPS connections. SSL Inspection is handled in the HTTP Proxy service.

Please note that this setup does not work if you are using a load balanced HA deployment in which the Forwarding Firewall service and the HTTP Proxy service are not on the same virtual server.

appid_fwd_proxy.png

HTTP Proxy Service (Transparent Proxy)

When the HTTP Proxy service on the CloudGen Firewall is configured as a transparent proxy, only HTTP traffic is sent to the HTTP Proxy. To pass HTTPS traffic through Application Control and SSL Inspection, you must configure an explicit access rule.

It is not possible to use the built-in SSL Inspection in the HTTP Proxy in a transparent proxy configuration.

appid_transparent_proxy.png

External Proxy

When clients use an external proxy for both HTTP and HTTPS traffic, there are no restrictions. Application Control can inspect all traffic coming from or going to the proxy.

appid_ext_all_in1_proxy.png

Separate HTTP and HTTPS (SSL) Proxies

No limitations apply when clients are configured to use separate external HTTP and HTTPS proxies. Application Control and SSL Inspection can inspect all traffic coming from and going to the HTTP and HTTPS proxies.

appid_ext_http_ssl_proxy.png

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