Bastion Host/L3 L4 Proxy - Rewriting IP Address and Port

I am trying to dynamically rewrite IP and port for all requests that go through a forwarding wildcard VIP.

 

 

Here is the flow:

 

 

1. Internal server sends a request out to a client.

 

2. Bigip intercepts requests and dynamically strips out dest ip and dest port and replaces with a new ip and port.

 

3.bigip gets the new ip and port by doing a lookup in an internal static table.

 

 

I am writing this from a blackberry so I can't give as much info in this post.

Yes, this might work, depending on the customer's requirements.

 

 

I could just predefine all the possible node (ip/port) permutations and then base the decision on the destination port.

 

 

Thanks!

 

 

By the way, is it possible to actually rewrite the IP address and port without using predefined nodes? I created a URI rewrite that works great:

 

 

when HTTP_REQUEST {

 

if { [HTTP::uri] == "/" } {

 

HTTP::uri "/dir1/dir2"

 

}

 

}

 

 

Here, HTTP::uri is used to rewrite the uri. I tried to do the same thing with IP::client_addr and I received error messages in the ltm log.

HTTP::uri allows you to both read and write the URI information, not all commands function this way. IP::client_addr is a read only command, which is why you were having problems.

 

 

-Colin