Implementing ProxyPass iRule in LTM

Scenario
You want to proxypass www.customersite.com to www.internalsite.com without replacing browser URL.

Solution

1) Download the proxypass iRule from the following links based on your BigIp version.

BigIp 10: http://devcentral.f5.com/wiki/iRules.ProxyPassV10.ashx

BigIp 9: http://devcentral.f5.com/wiki/iRules.ProxyPass.ashx

2) Add the iRule to the iRules section

3) Note down the pool names for customersite and internalsite websites

Assume the following names

Virtual Server: customersite-vs

Pools: customersite-pool and internalsite-pool exist in LTM

4) Create a Data Group Navigate to iRules -> Data group

Name: ProxyPasscustomersite-vs 

Please note the name should follow the convention above where customersite-vs should match the virtual server name.

Type: String 

BigIP 10

Name: /customerdir1 

Value: /internaldir1 internalsite-pool

When you add an entry, it will be of the format

/customerdir1 := /internaldir1 internalsite-pool

BigIP 9

String: /customerdir1 Value: /internaldir1 internalsite-pool

You can add more directory mappings as desired.

You can also map the above Value to direct URL mapping in case you do not want to map to a pool.

/customerdir1 := my-new-internal-site.com/internaldir1

5) Associate the iRule to customersite-vs virtual server.

6) Test the URL www.customersite.com/customerdir1. The webpages get loaded from www.internalsite.com/internaldir1 without replacing the browser URL.

Proxypass in F5 is similar to Apache ProxyPass functionality.