Client PC cannot reach Virtual Server

One way to get this scenario is when you have a vip with an irule that contains an error. The editor is great these days, but sometimes you can still sneak something in that makes no sense. Same goes for various profiles/policies you can add to the vip.

As the virtual server sends a rst I guess that TCP is okay, but it would be nice with a confirmation. If your external client is a win10; Test-Networkconnection is a nice powershell tool. FYI powershell still seems to rely on TLS1.1, TLS1.2 has to be manually enabled.

Try removing everything from your vip. Back to basics so to speak. If you do not have a webserver you can send the raw traffic to, then add a (basic, no custom) http profile and an irule that responds with a "Hello World".

when HTTP_REQUEST {
        HTTP::respond 503 content "Hello World, we're testing functionality"
    }
}

If you can see this from the client, then you can begin to add more of the original functionality in steps. I recommend working from the bottom up. first the custom tcp profile, then the http profile. Try to see where it breaks.

Oh, and a kind reminder to kill the browser between tests.