# Sinch SDK Client Network Ports

The protocols and ports in the following table are necessary for the Sinch SDK Client to successfully make a call. This list should be used for reference for clients experiencing difficulties due to restrictive firewalls.

| Protocol | Port | Type | Usage |
|  --- | --- | --- | --- |
| TCP | 443 | Signalling | HTTP over TLS |
| UDP | 3478,19302 | Media | STUN / TURN |
| UDP | 49152-65535 | Media | S(RTP) ICE (STUN) |
| UDP | 49152-65535 | Media | S(RTP) ICE (STUN/TURN) |
| UDP | 10000-60000 | Media | (S)RTP |