Translations:IRCOp guide/19/en

Because (G)ZLINE bans are enforced immediately they cause very little load on the server, they are very efficient. On the other hand there are no DNS lookups done, no ident lookups, no nickname or username is known, SSL/TLS connections are never established. In short: it has a lot of downsides too, but it can be used if your server is under attack by a lot of clones.