Tons of anonymous entries in my logs?

[WilliamUT]

I am getting tons of anonymous entries in my logs and am wondering why? I will get 3 of them in a row followed by the login name of the person doing it. They look like this :

10.162.21.112, anonymous, -, -, 9/28/2004, 0:00:01, -, -, -, -, -, 0, -, -, -, -, -, -, -, -, -, -, -, -, -
10.162.21.112, anonymous, -, -, 9/28/2004, 0:00:01, -, -, -, -, -, 0, -, -, -, -, -, -, -, -, -, -, -, -, -
10.162.21.112, DHMC\DR, -, -, 9/28/2004, 0:00:01, -, -, -, search.domainsponsor.com, 64.235.246.141, 80, -, -, -, -, -, -, -, -, -, -, -, -, -


Is this normal behavior? It just seems to make our logs HUGE and wastes tons of space in my database. Also I am getting alot of blank entried with no data in them. Any hints why this would be happening? Thanks

 

[LUISKA]

Well, it's annoying but it's normal.
Let's see validation mechanism:

1- anonymous and return code 407 is registered by ISA because no credentials are send at all by the client

2 - A second anoymous and 407 is registered because only the first part of the handshake is completed

3 - If the client has sent correct credentials Isa resgistres user name and a normal return code (200, 302..)

Each new session new entries...