NAT/Proxy combinations

["Atul Sabharwal" <iamatul at comcast.net>]

Title: Message

Generally, people use NAT or Proxy as firewalls.  Would it be more secure to use a NAT Proxy combination ?

Say, a NAT connected to Proxy connected to NAT.  Would this prevent external as well as internal attacks.

Also, use static routes between the NAT/proxy/NAT to prevent internal route spoofing.

 

Most proxies I have known are software based and NAT's are firmware based.  Assumption being all required

application level gateways are available for NAT.

 

e.g. Use hardware NAT's are from two different vendors (with different packet processing algorithm), and proxy is squid. 

--

Atul

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