How do I configure Cisco PIX 501 Firewall to allow Inbound / outbound emails for Exchange Server 2003

Posted on 2007-09-28
Last Modified: 2010-04-09
How do I configure Cisco PIX 501 Firewall to allow Inbound / outbound emails for Exchange Server 2003, I'm using Windows Server 2003 SBS, the Exchange server is installed and configured and I want to use it but I don't know how to configure the Cisco PIX 501 Firewall to allow inbound and outbound emails. Appreciate your help.
Question by:czarbapora
    LVL 79

    Accepted Solution

    Command line config:

    access-list outside_access_in permit tcp any interface outside eq smtp
    access-group outside_access_in in interface outside
    no fixup protocol smtp 25
    static (inside,outside) tcp interface smtp 192.168.101 smtp netmask


    Author Comment


    I have this line in the configuration " fixup protocol smtp 25",
    should I delete this before entering the commands that you provided me?
    what does fixup command means?

    thank you very much for your help.

    Author Comment

    Hi Lrmoore,

    sorry i have not provided you the complete details, this is my network setup;
    cisco pix outside interface ip -
    cisco pix inside interface ip -
    LAN ip add - / 24.
    please show me the actual configuration to allow inbound and outbound emails, sorry that I don't understand your first comment.


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