[Serusers] Nathelper question

[ser]

Hi,

nat_uac_test can be call with parameter :
"1" : via adress is compared to signaling IP
"2" : test if RFC1918 adress

But in some configuration, i see "3". What is it for ? I can't find it in the nathelper code.

Another question, what happen if two people on the SAME LOCAL network try to call each other via my SER server ?

Their adress will be detected as private and rtpproxy will be use, but it's not needed as they are visible for each other.

How could i prevent this ?

Thanks