It's unfortunate that this stuff is necessary. But as the recent episode has illustrated, any security that can make it harder for the hackers is a friend of mine. It's too bad that some of it causes problems such as this for some members.
Surely there is a better solution than to have a forum so secure that it is impossible to use. Actually I dont believe this stupid DNS error on login is security related, it is a fault in the software or server.
If you read this thread, you will learn that it has been established that a few members using dynamic IPs (or other multiple addresses) have trouble at times when using the "remember me" function. We could easily turn off the "Stronghold Cookie" security feature and be done with the problem. But we have determined that since it affects only 1-2% of members, the relaxed security is not worth it. And those with occasional problems need only to log off and on each time in such a way that no cookies are retained. A very easy process.