UDP TTL - Howto do it (for SIP for instance) ?

[Reiner030]

Hello,

I found out, that 2.1 relase now have a text comment that TTL is only for TCP connections and also blocks UDP rules which try to set TTL…

When searching this forum this topic is very rare requested/answered... some articles > 5 years old which can't be "actual" useable ...

The only hint I found was

http://forum.pfsense.org/index.php/topic,4364.msg27073.html#msg27073

State timeout is for TCP only.
You might visit system -> advanced and set the firewall optimization mode to conservative.

But even this is perhaps wrong because the info text of these options writes:

"Firewall Optimization Options:

• normal (default)
        as the name says, it's the normal optimization algorithm
• high-latency
        used for high latency links, such as satellite links.  Expires idle connections later than default
• aggresive
        expires idle connections quicker. More efficient use of CPU and memory but can drop legitimate idle connections
• conservative
        tries to avoid dropping any legitimate idle connections at the expense of increased memory usage and CPU utilization.

EDIT (clicked on wrong button^^):

But in my opinion the "conservative" option is less useful for shorter TTLs than the "normal" one ?