What does MSIE 7 stand for?
What about Mozilla/4.0?

Is there a list somewhere that explains the meaning?

Microsoft Internet Explorer
Mozilla is firefox, use google to find out what these terms are if you are unsure, there's not a list that I know of or have even searched for but you can use the tools I've shown in the first post to help you find some info around these :)

That's the main point really.

Do NOT enter the term "Mozilla" into this mod! You will be blocking just about every windows computer on the planet if you do!

Here's a fairly typical Windows computer user agent string:

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/6.0; SLCC2; .NET CLR 2.0.50727

ALL windows computer user agent strings are going to have the word "Mozilla" in them no matter what browser the computer actually uses.

Entering Mozilla/4.0 is different than entering Mozilla correct? If so, is blocking Mozilla/4.0 unreasonable? All the Russian IPs are using it and no one else.

NO Mozilla AT ALL!

Most ALL windows computers gonna have that "Mozilla4.0" yours probably does too! Have you studied your OWN user agent string?

But Simon's original list of UA that comes with the mod contains:

Mozilla.*Indy
Mozilla.*NEWT
Mozilla*MSIECrawler

And my understanding is that will only block those particular strings? It looks like this is true because they're on my list and there are plenty of Mozilla/5.0 and Mozilla/4.0 in my forum.

So if I understand correctly; adding Mozilla/4.0 (which I will not do as per your recommendation) will not affect Mozilla /5.0?

I never saw that on his list or any other list, but yes as long as "mozilla" isn't on a line by itself you got no problems.

But what i am telling you is, blocking "Mozilla/4.0" gonna block billions of computers, not just the Russian ones.

Find something unique in their strings to block, if you want to use this to block them. You might not find any such.

Understood, thanks.

Max, you may be interested in this. I had a legit user blocked out of my forum. I checked and rechecked his UA and could not figure out why he was blocked Of course turning off the mod unblocked him, so I knew it had to be something.

On a hunch I looked at the MSIE entries I copied from your old post:

MSIE 1
MSIE 2
MSIE 3
MSIE 4
MSIE 5
MSIE 6

I realized that MSIE 1 is the culprit being the first part of MSIE 10.0;

Have you since removed MSIE 1 from your list?

Is there another way to make MSIE 1 work without affecting MSIE 10? As well as the other MSIE, like MSIE 2 for when IE gets to version 20 :)?