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block port 25 accept from defined ip

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block port 25 accept from defined ip - 22.Dec.2004 10:40:00 PM   
ex2ktpe

 

Posts: 12
Joined: 23.Dec.2003
From: ca
Status: offline 		Hi,
I have recently purchased a spam filter. Problem is that the spammers are ignore all my MX records. How can i block port 25 on the exchange box except from a defined ip address? (the spam applicance)
Post #: 1
RE: block port 25 accept from defined ip - 30.Dec.2004 10:36:00 PM   
Henrik Walther

 

Posts: 6848
Joined: 21.Nov.2002
From: Copenhagen, Denmark
Status: offline 		How can spammers connect to your Exchange Server on port 25/TCP if it's located on your internal network? Or does it have a public IP address?

(in reply to ex2ktpe)
Post #: 2
RE: block port 25 accept from defined ip - 5.Jan.2005 1:41:00 PM   
Miracle

 

Posts: 20
Joined: 8.Apr.2003
From: London UK
Status: offline 		Must be public IP and they have got the IP address of the mail server.

I believe you can set this from the SMTP server properties in System Manager. Under the Access tab, "Connection Control"

(in reply to ex2ktpe)
Post #: 3
RE: block port 25 accept from defined ip - 7.Jan.2005 7:47:00 PM   
ex2ktpe

 

Posts: 12
Joined: 23.Dec.2003
From: ca
Status: offline 		yes its a public IP.

I first created a permit policy in my firwall for the spam filter IP addres then i created a deny policy in my firewall for everything.

works perfect

(in reply to ex2ktpe)
Post #: 4

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