Stuck on a persistent 407 Proxy Authentication Required error when attempting to register a SIP trunk from our AppFoundry-hosted PBX integration to Genesys Cloud. The setup involves a multi-tenant architecture where each customer org has its own dedicated SIP trunk configuration managed via the Platform API.
The issue manifests immediately after the trunk is provisioned. The SIP INVITE requests are reaching the Genesys Cloud edge, but the registration handshake fails during the proxy authentication phase. We have verified that the credentials (username/password) match the SIP trunk configuration in the Genesys Cloud admin console exactly.
Environment details:
- Genesys Cloud Region: US-East
- AppFoundry Integration Type: Premium App with Server-to-Server OAuth
- SIP Trunk Type: SIP Trunk (Inbound/Outbound)
- SIP Endpoint: Custom PBX running Asterisk 18
- Genesys Cloud SDK: @genesys/cloud-sip v1.2.0
- API Endpoint Used: /api/v2/telephony/providers/edges
The error log from the PBX shows:
SIP/2.0 407 Proxy Authentication Required
WWW-Authenticate: Digest realm="genesyscloud.com", nonce="abc123..."
We are using the standard Digest authentication mechanism. The nonce provided by Genesys Cloud appears valid, but our PBX is failing to compute the correct response hash. We have tested this with a static IP address and ensured that the SIP trunk is allowed in the Genesys Cloud firewall settings. The issue does not occur with softphones using the Genesys Cloud desktop application, only with the SIP trunk integration.
Has anyone encountered similar issues with SIP trunk registration in a multi-org AppFoundry environment? We are considering switching to a different authentication mechanism or adjusting the SIP signaling parameters, but want to rule out any platform-specific quirks first. The impact is significant as it blocks voice routing for new customer onboarding.
Make sure you verify that the authentication credentials configured in your Genesys Cloud SIP Trunk settings exactly match those expected by your AppFoundry-hosted PBX. A 407 Proxy Authentication Required error typically indicates that the proxy server, which in this context is often the intermediate layer between the PBX and the Genesys Cloud edge, is demanding credentials that have not been supplied or are incorrect.
From a performance monitoring perspective, this registration failure will immediately impact your queue activity metrics. Agents assigned to this trunk will appear as unavailable, causing a spike in abandoned calls and a drop in service level adherence if not addressed promptly. It is crucial to align the credential format-specifically the username and password fields-with the requirements of the proxy server.
In the Genesys Cloud Admin portal, navigate to Telephony > SIP Trunks and select the affected trunk. Under the Authentication tab, ensure that the Username and Password fields are populated correctly. If your PBX requires a specific realm or domain for authentication, verify that this is also configured appropriately.
Warning: Misconfigured credentials can lead to repeated registration attempts, which may trigger rate-limiting or temporary bans from the proxy server. This can exacerbate the issue and cause prolonged downtime.
Additionally, check the Connection settings to ensure that the outbound proxy address, if required, is correctly specified. Some multi-tenant architectures require explicit proxy configuration for SIP traffic to route correctly through the network infrastructure.
To diagnose further, review the SIP trace logs in Genesys Cloud. Look for any 407 responses and compare the authentication headers with the credentials configured in the trunk settings. This will help identify any discrepancies in the authentication process.
If the issue persists, consider reaching out to your AppFoundry support team to verify the proxy server configuration and ensure that it is correctly handling the authentication requests from Genesys Cloud.