Blocking telnet to SMTP port

From: Adam Gilstrap (agilstrap_at_infoprogroup.com)
Date: 02/27/04

  • Next message: Mathieu Clabon: "Re: Re: USB to serial bug"
    To: <redhat-list@redhat.com>
    Date: Fri, 27 Feb 2004 10:13:20 -0500
    
    

    I have seen some domains that prevent telnet access to port 25. How can
    I implement this through iptables?

    Adam

    -- 
    redhat-list mailing list
    unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe
    https://www.redhat.com/mailman/listinfo/redhat-list
    

  • Next message: Mathieu Clabon: "Re: Re: USB to serial bug"

    Relevant Pages

    • Re: Firewall
      ... It sounds like you may not have your smtp server working properly ... I even turned it off then reboot and da port is still blocked or maybe ... > or of course you could do it manually with iptables. ... -- redhat-list mailing list unsubscribe mailto:redhat-list-request@redhat.com?subject=unsubscribe ...
      (RedHat)
    • RE: redhat-list Digest, Vol 4, Issue 38
      ... Re: Iptables: port 22 open only for my IP ... Windows Services for Unix 3.5 ... It does absolutely nothing if you have a rampant application on your Windows box that opens a port to the outside world. ...
      (RedHat)
    • Firewall Rules Summary
      ... Subject: Firewall Rules Summary ... This script is provided "as is" with no implied warranty. ... this came from various howtos and articles on iptables that existed around ... #specific port denies>1024 tcp ...
      (Focus-Linux)
    • Re: Linux IPTables tutorial pdfs and plain text available.
      ... What you are referring to here are CHAINS. ... create as a user-defined chain in my iptables scripts to reject traffic ... need to allow port 20/tcp only if you're using active FTP. ... This is actually not a bash script, ...
      (comp.security.firewalls)
    • Re: Mitigating SYN flooding with Netfilter or net.ipv4.tcp_syncookies ?
      ... The only chink, if you will, is the protection ... a port scan, ... The soloution to is to use some of the 'experimental' patches to iptables, ... If you do rate limiting after this rule you will have much fewer syns to ...
      (Focus-Linux)