Solving the SIP NAT traversal challenge
There are many ways to solve the NAT puzzle with many different types of NAT. So, for a beginner, the problem becomes very confusing We will see a table with the following valid methods of solving SIP for the NAT issue:
- STUN: Simple traversal of UDP over NAT
- TURN: Traversal of UDP over Relay NAT
- ALG: Application Layer Gateways
- MANUAL: Manual configuration (port forwarding)
- UPNP: Universal Plug and Play
|
Method |
STUN |
TURN |
ALG |
MANUAL |
UPNP |
|---|---|---|---|---|---|
|
Symmetric NAT |
No |
Yes |
Yes |
Yes |
Yes |
|
It requires phone support? |
Yes |
No |
No |
No |
No |
|
Scalability |
Good |
Poor |
Good |
Good |
Good |
|
User effort |
Small |
Small |
Small |
High |
Small |
|
Reliability |
Good |
Good |
Poor |
Good |
? |
|
Industry support |
Good |
Good |
Average |
Good |
Poor |
Most ...
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