Assign a Pool regarding to the Destination Port.

Hi Roger

Do you have 50 pools for ( one on each port in the range) on that particular URL ?

Also in the first solution, wouldn't it just redirect to one pool instead of 50 different ones. Moreover I guess you need a pool for 30000-30050 , the statement is like <30000 or >30050 . I guess it should rather be >30000 or <30050 ( or whatever port range you need )

The first solution is idle if you have one pool for that range of ports between 30000-30050. Or else your would need the switch case or if else if statements to accomplish this.

Regards, Vikram Khatri

No, i just have one Pool for all of These Ports.

Yes, you're right. >30000 or <30050 correct. I made a mistake.

I just thought there's maybe a better Solution then if else if.

Best Regards, Roger

Hi Roger

If that is the case , the switch case would be too vague for you. If , else if statement suits you better I would say. Even a while command doesn't match your situation here.

Basically what we are doing here is checking if the port is in our interested port range A, then assign pool A or else if its equal to our desired port B, assign Pool B.

When both the conditions don't match, we don't want the LTM to process the request so we give a final result of drop for everything else. ( using an else statement ).

However lets see if we can get a better solution for this :) .

Cheers! Vikram (Vik )

Hi Aschi,

using ">30000 or <30050" will cause every single port to trigger, since port :1 would be lower than :30050 and port :65535 would be higher than 30000. The problem is caused by the "OR" operator which requires "at least one" of the expression to be "true" to trigger the desired action...

The right snipped for your task would make use of an "AND" operator...

if { ( [TCP::local_port] > 30000 ) and ( [TCP::local_port] < 30050 ) } then {
    pool poola
} elseif { [TCP::local_port] == 22 } then {
    pool poolb
} else {
    drop
}

By doing so, the port must be above :30000 AND below :30050 to trigger the desired action. Furthermore "elseif" is your friend to chain several independent expressions in a single "If" command.

Cheers, Kai