On Fri, Oct 10, 2008 at 4:13 PM, Daniel-Constantin Mierla &lt;miconda(a)gmail.com <mailto:miconda@gmail.com>> wrote: Hello, On 10/09/08 14:17, mayamatakeshi wrote: Hello, I'm testing with kamailio 1.4 (just got revision 5050). I'm stressing it using a sipp scenario to verify which population of subscribers kamailio can handle. Using openser 1.3.3 I could easily keep thousands of subscribers online even when running on a VirtualMachine hosted on a desktop computer (last time I tested this it was about 8000 subscribers). But I'm running kamailio on a production machine and when I reach around 700 subscribers, kamailio starts to log this: Oct 9 17:44:20 ipx029 /usr/local/sbin/kamailio[7689]: ERROR:auth:build_auth_hf: no more nonces can be generated Oct 9 17:44:20 ipx029 /usr/local/sbin/kamailio[7689]: ERROR:auth:challenge: failed to generate nonce And the registration fails. Is anybody else seeing this? might be related to an addition in from 1.4 -- set: modparam("auth", "nonce_reuse", 1) and try again. Let me know the results. Hi Daniel, thank you. That did it. My test is running fine now (1450 subscribers online re-registering in a loop every 1 second).