Technical Tip: How to block Gmail and allow a URI of Gmail in FortiProxy

hrahuman_FTNT · ‎08-26-2022

Description

This article describes how to block Gmail and allow the URI of Gmail in FortiProxy.

Scope

FortiProxy.

Solution

Follow the below configuration to allow a URI (/business) and block the rest of the domain (gmail).

Create proxy addresses as below:

# config firewall proxy-address
      edit "gmail-domain"
         set type host-regex
         set host-regex "gmail.com" > Domain gmail.com
       next
       edit "gmail-sub"
         set host "gmail-domain"
         set path "/business" > URI gmail.com/business
       next
   end

Create Allow sub-domain policy:

# config firewall policy

       edit 1
          set type explicit-web
          set name "ACCEPT-POLICY"
          set dstintf "any"
          set srcaddr "all"
          set dstaddr "gmail-sub" > Gmail URI
          set action accept
          set schedule "always"
          set service "webproxy"
          set explicit-web-proxy "web-proxy"
          set logtraffic all
          set log-http-transaction enable
          set comments " (Copy of Test)"
          set ssl-ssh-profile "test" > Deep inspection
       next

Create deny (Gmail) policy:

       edit 4
          set type explicit-web
          set name "DENY-POLICY"
          set dstintf "any"
          set srcaddr "all"
          set dstaddr "gmail-domain" > Gmail domain
          set schedule "always"
          set service "webproxy"
          set explicit-web-proxy "web-proxy"
          set logtraffic all
          set ssl-ssh-profile "test" > Deep inspection
       next
end

Note: Here the ordering of the firewall policy is crucial.

The accept policy (allowing the subdomain) should always reside above the deny policy (denying the complete domain) in order.

Technical Tip: How to block Gmail and allow a URI of Gmail in FortiProxy

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