Hi all, the function check_user_blacklist in kamailio 1.4 returns -1 (FALSE based on the doc) "if a match is found and it is not set to whitelist", otherwise it returns 1 (TRUE). So the function returns the same value if a match is found and is set to whitelist and if there are no matches. I need to differentiate the two situations. The userblacklist module in kamailio 3.0 has a new function "check_user_whitelist" that can solve my problem, but at this time I can't upgrade. I solved the problem, changing only the return value in case of whitelisted entry (userblacklist.c file), but I don't know if it is a safe (and suffice) modification. Below the piece of code in the userblacklist.c: if (dt_longest_match(dt_root, ptr, &whitelist) >= 0) { if (whitelist) { /* LM_ERR("whitelisted"); */ return 2; /* found, but is whitelisted */ <===== CHANGED HERE. IT WAS return 1 } } else { /* LM_ERR("not found"); */ return 1; /* not found is ok */ } Thanks. Regards. -- Antonio