RE: Securing Exchange Server

[Ben Winzenz]

Title: Message

Can you tell us how you tried to set up the port filtering on this server?  Did you configure it by TCP, UDP or IP Protocol?  Also, remember that internally, if your clients are connecting via Outlook, they will be using different ports.  Do you have 2 NIC's in this server?  More info on your exact setup please.  Ports 25, 80 and 110 sound like the ports you want open to the outside world.  Inside, I wouldn't restrict ports.  It would get really messy.   Ben Winzenz, MCSE Network/Systems Administrator Peregrine Systems   -----Original Message----- From: Manish Govindji [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 21, 2002 3:11 PM To: MS-Exchange Admin Issues Subject: Re: Securing Exchange Server   Thanks for the reply.   Not for relay, but we do not have any firewall as yet, and i would like to close unecessary ports. Its a fresh installtion NT server PDC, Exchange 5.5. So all the ports are open. I just want 25, 110, 80 to be open.   I tried that on TCP/IP security and nobody could connect to mail server ....     ----- Original Message ----- From: Martin Blackstone To: MS-Exchange Admin Issues Sent: Thursday, February 21, 2002 11:02 PM Subject: RE: Securing Exchange Server   So are you saying someone used you as a relay or hacked your box or what?   Are you behind a FW? What ports are open to the Exch server? -----Original Message----- From: Manish Govindji [mailto:[EMAIL PROTECTED]] Sent: Thursday, February 21, 2002 11:41 AM To: MS-Exchange Admin Issues Subject: Securing Exchange Server Hello,   I have tried many times but failed to secure Our Exchange Server. We have a Exchnage server for only   Server has NT4, IIS4, DNS.   How Do I use TCP IP security tab to configure security so that all the unnecessary ports are closed, we only use exchnage for POP3 and SMTP.   The last time I tried I got Max user limit .... on SMTP     Many thanks, List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm