Preventing Spamming

[idemoya]

I recently set up an Exchange 2000 server. And we were recently a victim of a spamming attack which dirupted normal usage. I am confused on how to limit access to our SMTPSV server.

In the properties dialog box Access tab "Authentication" from my understanding must have the anonymous access checked off in order to recieve external email from other domains.

In the realy dialog box I have selected the radio button "Allow all computers which successfully authenticate to relay" and i have the radio buttine selected which is "Only the list below" with a blank list.

Is this the best setup since i have remote users that dial up using ISP which always provide dynamic IPS and home users with DSL that provide dynamic IPS.

Thank You

 

[mixuone]

Hi,

I may be wrong about this, but I believe if you have it set to allow authenticated computers to relay and also have anonymous set for authentication so may be letting everyone relay.

 

[JWFdev]

If you are using two NICs in the same Exchange machine here's some advise

This was a really good suggestion from Microsoft.
"Configuring a Dual-Homed Microsoft Exchange 2000 Server as a Gateway Server"

http://www.microsoft.com/downloads/release.asp?ReleaseID=43539&area=search&ordinal=4

I did this and it works great!
Sincerely,
John Ford