On 16/01/2016 4:11 a.m., Murat Balkan wrote: > Hi, > > Thanks for the response. > What I want to achieve is to prevent 2 users enter with the same username simultaneously. User usernames are unique. Same username == same user. There cannot be a second user with same username. However: User name and username are two very different things that are often confused. Perhapse you are confusing them now. There can be a different User with same user name (notice two words) when the User name and username are different. Some usernames contain realm/scope or consist of just a globally unique token which are not part of the User name. Squid and its ACLs deal with username, not User name. Amos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx http://lists.squid-cache.org/listinfo/squid-users