Any need to replicate ATA config in XLite?

[NoisyWave]

Hi,

If I only use XLite (no ATA), how can I set the config that I use to do on an ATA (NAT mapping, STUN Server, router opening SIP port 5060, and many other advanced SIP, Regional, Line settings). Are there any such equivalent config in XLite? Does XLite adopt ideal default values or may be are they irrelevant to a softphone?

Thanks in advance for any help.