SIP 302 Moved Temporarily vs 407 Proxy Authentication Required
SIP 302 (Moved Temporarily) is a 3xx Redirection response, while 407 (Proxy Authentication Required) is a 4xx Client Failure response. 302 indicates that the callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests. In contrast, 407 means that the client must first authenticate with the proxy. The proxy returns a Proxy-Authenticate header with a challenge.
Description
The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
When You See It
When a user is temporarily reachable at a different location, such as when traveling or using a different device.
How to Fix
Redirect the current call to the Contact URI provided, but keep the original URI for future requests.
Description
The client must first authenticate with the proxy. The proxy returns a Proxy-Authenticate header with a challenge.
When You See It
When a SIP proxy requires authentication before forwarding the request. Similar to 401 but for proxy servers.
How to Fix
Resend the request with a Proxy-Authorization header containing valid credentials for the proxy.
Key Differences
302 is a 3xx Redirection response, while 407 is a 4xx Client Failure response.
SIP 302: The callee has temporarily moved to a different address. The client should retry the request at the Contact address but continue using the original URI for future requests.
SIP 407: The client must first authenticate with the proxy. The proxy returns a Proxy-Authenticate header with a challenge.
You encounter 302 when when a user is temporarily reachable at a different location, such as when traveling or using a different device.
You encounter 407 when when a SIP proxy requires authentication before forwarding the request. Similar to 401 but for proxy servers.
When to Use Which
For 302 (Moved Temporarily): Redirect the current call to the Contact URI provided, but keep the original URI for future requests. For 407 (Proxy Authentication Required): Resend the request with a Proxy-Authorization header containing valid credentials for the proxy.