MultiCom Technical Support

[Support]

Making the MultiCom act as a transparent proxy is not difficult to do but you must be sure that your choice of Proxy software supports a transparent proxy option. For instance, with the Squid Proxy software, transparent proxying is disabled by default and enabling it may change certain functionalities.

For the MultiCom, starting from a default configuration,

1. enable NAT on the LAN interface with a rule to map 8080 to the LAN port 80 (allowing you to continue to get access to the MultiCom after configuring the transparent proxy redirection)
   
2. configure your DMZ to 11.0.0.1/8 and to give only 1 address to the DMZ network... 11.0.0.2
   
3. configure your Squid proxy as a DHCP client on the DMZ network
   
4. activate MISC>NAT
   
5. under MISC>NAT add a rule such as
   

   NAT option	parameter
   protocol:	TCP
   source:	10.0.0.0/8
   source port:	any
   destination:	any
   destination port:	mapto
   to address:	11.0.0.2
   to port:	8888
   type:	destination

   
   
6. Configure Squid to support transparent proxy redirection
   In section 17 of the Squid 2.4Stable3 FAQ there is description of using Squid in this capacity (please read this and the squid.conf file - httpd_acceleration for a full explanation of what the following code is doing.)
   
   http_port 8888
   httpd_accel_host virtual
   httpd_accel_port 80
   httpd_accel_with_proxy on
   httpd_accel_uses_host_header on