Forum Discussion

Employee

Feb 09, 2021

Use LTM Policies to Create a VIP listening on Specific Ports

All, we are moving from A10 to F5 LTM. With A10 we have 1 VIP, and up to 4 "service-groups" or pools serving 4 specific ports. My goal is to provide a similar functionality in the LTM using Local Tra...

Facepalm

JRahm

Feb 10, 2021

#facepalm...notice the hidden option on the tcp port:

mine was remote by default, changing to local fixed the issue. Working policy that should help:

ltm policy allports_testpolicy {
    controls { forwarding }
    last-modified 2021-02-10:16:42:35
    requires { tcp }
    rules {
        tcp-80 {
            actions {
                0 {
                    forward
                    client-accepted
                    select
                    pool nerdlife_pool
                }
            }
            conditions {
                0 {
                    tcp
                    client-accepted
                    port
                    local
                    values { 80 }
                }
            }
        }
        tcp-8080 {
            actions {
                0 {
                    forward
                    client-accepted
                    select
                    pool nerdlife_pool
                }
            }
            conditions {
                0 {
                    tcp
                    client-accepted
                    port
                    local
                    values { 8080 }
                }
            }
            ordinal 1
        }
        tcp-all-else {
            actions {
                0 {
                    shutdown
                    client-accepted
                    connection
                }
            }
            conditions {
                0 {
                    tcp
                    client-accepted
                    port
                    local
                    not
                    values { 80 8080 }
                }
            }
            ordinal 2
        }
    }
    status published
    strategy first-match
}

Simon_Blakely

Employee

Mar 07, 2021

From a management point of view, I personally think creating multiple Virtual Servers on separate ports is an easier and more understandable solution.

If you do want to create a single Virtual Server that listens on multiple ports, you can use a Traffic Matching Criteria on the virtual:

ltm traffic matching criteria

You have to create and assign the traffic-matching-criteria from the CLI, but you can use address lists and port lists, and can configure Source Address lists and destination address lists/destination port lists.