change TCP session timeout

[zauberer]

Hi!
Can someone tell me how I can change the default session TCP session TTL for a specific Port?

On Fortigate (FortiOS) i can set it like this: (example: default is 7200 seconds, SSH is 172800)
config system session-ttl
    set default 7200
        config port
            edit 22
                set protocol 6
                set timeout 172800
                set start-port 22
                set end-port 22
            next
end