Quick question about SIP 403 Forbidden errors popping up during a basic load test.
Running JMeter 5.6.2 from a server in Asia/Singapore.
Trying to validate SIP trunk capacity for Genesys Cloud.
The goal is simple.
Push 20 concurrent SIP REGISTER requests per second.
Using the default SIP sampler in JMeter.
Configured with standard SIP credentials.
The first 10 requests succeed.
Status 200 OK.
Then the errors start.
Getting 403 Forbidden consistently.
No rate limit headers in the response.
Just a plain 403.
Checked the Genesys Cloud admin console.
No blocks on the IP address.
The SIP trunk is active.
Status shows green.
Tried lowering the rate to 5 requests per second.
Still getting 403s after the first few.
Is there a hidden connection limit for new SIP sessions?
Or is this a credential issue at scale?
The JMeter config uses a CSV data set for user agents.
Each thread has a unique username.
Passwords are hashed correctly.
Verified against the GC UI.
The latency is low.
Under 100ms.
So it is not a timeout.
The 403 comes back instantly.
This feels like a platform-side restriction.
Maybe a burst limit?
But the docs do not mention it.
Any ideas on what triggers this?
Need to know if this is a config error or a platform limit.
Thanks for the help.