Hi there, we are using kamailio as Registrar and Dispatcher. Running ```modparam("auth_db", "use_domain", MULTIDOMAIN) //with MULTIDOMAIN = 1``` In our ```route[AUTH]``` I call ```if (!auth_check("$fd", "subscriber", "1")) {``` to filter unwanted Guests and and brute-force attacks to the blacklist. strangely auth_check fails under the following conditions: 1 UserAgent(Phone) with 2 SipAccounts with the same user-name but different realm The first account can REGISTER without a problem. for the second Account REGISTER fails with -2. If I disable the first one the second one Registered. Could it be that auth_check is not multidomain-safe in one user-agent thread? Hope to here from you... PS: I like kamailio =). --- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/548