Host_Header IRule for F5 LTM

Are you looking for an HTTP redirect or masking it (i.e. connect to another destination without changing the URL)?

Say I have the below vip setup in the LTM: VS: 10.186.41.15 for host www.test.com and is the only vip accessible to the user population. I then create another LTM VS vip: 10.186.41.16 for www.dummy.com, which is "not" accessible to the user population.

I setup my dns to have both websites, "www.test.com & www.dummy.com" to point to 10.186.41.15 for resolution.

I want to create an IRule and assign it to the vip 10.186.41.15, that says any incoming request which has "www.dummy.com" in the host_header, forward this request to the vip 10.186.41.16.

The best way to accomplish what you're looking for is to point both DNS-records to the same VIP, create separate pools for each of the domains, and use an iRule to select the pool based on the host.

So the only way to do this is to point to the pools, and not the vip's.

Theoretically it's possible, but it would be a poor approach. The proper way is to use pools.

It's totally possible.

when HTTP_REQUEST {
    if { [string tolower [HTTP::host]] equals "www.dummy.com" } {
        virtual dummy_vs
    }
}

where "dummy_vs" might be the name of the dummy virtual server. Best part, because you're using the virtual command, the dummy VIP's destination address doesn't have to be routable.

Thanks to everyone for your help with this issue!!