Return a page when a port is accessed

You're 99% there. Just have to remember that you're not in HTTP yet. CLIENT_ACCEPTED happens in TCP, so you have to use TCP::respond instead of HTTP::respond. You can also send a response and close the connection before the client has actually transmitted the request, it's tolerated OK. For example:

TCP::respond "HTTP/1.0 200 OK\r\nContent-Type: text/html\r\n\r\nPlease connect to port 8080 instead of port [TCP::local_port]"

Hi,

If the VS is defined with * service port, create another VS with port 143 and profile HTTP.

enable the following irule on this VS:

when HTTP_REQUEST {
HTTP::respond 200 content " You used port 143, please use 8080."
}