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  1. #1

    Block one IP > mail

    Anyone know how to block one specific IP
    So that my box couldn't send Email to that IP
    By PHP mail(); or SMTP ?

    Is APF -d IP enough?

    Thx in advice.

  2. #2
    Join Date
    Jun 2008
    Location
    Los Angeles, CA
    Posts
    237
    use iptables to block all outgoing traffic to the specific IP
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  3. #3
    i did even ping to IP doesnt work
    that will do trick?

  4. #4
    Join Date
    Aug 2009
    Posts
    38
    If you configured IPTables correctly for this, then yes, that is all you need.

  5. #5
    Join Date
    Jun 2008
    Location
    Los Angeles, CA
    Posts
    237
    You should be all set.
    www.betteresolution.com
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  6. #6
    Well to be honest I don't use iptables, i Use APF to block traffic.
    But i get APF uses iptables.

    I got in/out traffic blocked to IP that i wanted by adding

    APF -d IPadress

    rule

    i wonder if it is enough?

  7. #7
    Join Date
    Aug 2009
    Location
    Bangalore
    Posts
    59
    run the commands below in your server command prompt.

    /sbin/iptables -A OUTPUT -p tcp -i eth0 -s x.x.x.x --dport 25 -j DROP
    /etc/init.d/iptables save

    /etc/init.d/iptables restart

    replace the x.x.x.x with the IP address that you want to block.


    Thanks,
    Mike

  8. #8
    Thanks Mike but i did remove -i eth0 bcoz Iptables told me to.

  9. #9
    Join Date
    Aug 2009
    Location
    Bangalore
    Posts
    59
    Hey friend, It's fine

  10. #10
    Join Date
    Nov 2004
    Location
    Australia
    Posts
    1,591
    apf uses iptables, it's just an easier interface to iptables. So if you've blocked the site with "apf -d" and you can't ping it, the site will be cut off.

    If you really want to test it, try "telnet 1.2.3.4 25" where 1.2.3.4 is the IP you blocked; if it times out, then you know you've cut it off successfully. If you want to be even smarter, you could try turning iptables off.

  11. #11
    Quote Originally Posted by Cameleon View Post

    I got in/out traffic blocked to IP that i wanted by adding

    APF -d IPadress

    rule

    i wonder if it is enough?
    yes that will work fine.
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