Re: iptables & tcp wrappers

From: secmgr (security_at_jim-liesl.org)
Date: 09/28/04

  • Next message: Tom Walsh: "Re: iptables & tcp wrappers"
    To: Meatplow <greg@meatplow.com>
    Date: 27 Sep 2004 21:17:00 -0600
    
    

    Check, but I believe that your sshd (the daemon) is compiled against
    libwrap. What this means is that there should be a /etc/hosts.allow
    file that will let you only allow access to the daemon from specified
    ip's. It's not a total solution, but it will cut down the noise quite a
    bit.

    jim
    On Fri, 2004-09-24 at 14:57, Meatplow wrote:
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    > Hello.
    >
    > I'm running RH Enterprise edition.
    >
    > I'm relatively new to iptables. I am getting the common intrusion
    > attempts with some of the common uses of test/guest/root/ and a
    > couple others I've been able to add the IPs to the to iptables.,
    > but
    > I'd really like a log that tells me the info that I want to know.
    >
    > My basic input command is this :
    > #iptables -A INPUT -p tcp -s PUT_IP_HERE -d 0/0 --syn -j DROP
    >
    > iptables seem a little convoluted. Example. To delete a line -
    > supposedly give it a line and it will be deleted/modified. My
    > problem is even with #iptable -L -v there is no line number ?
    >
    > My goal is to block all incoming ssh attempts except IP#.
    > This is where I got into hosts.allow/deny as mentioned below.
    >
    > I've tried to find many different types of commands and it works to
    > some degree, but not the way I'd expect it to.
    >
    > Any help would be appreciated. I'm not completely sure that I
    > understand iptables as well as I want/need to. I've also toyed
    > around with the hosts.allow/hosts.deny and have not been successful.
    >
    >
    >
    > I know that there is a lot of info in here, and I'm tired. I'll
    > leave it at that
    >
    >
    > Thanks in advance for your time and help.
    >
    > Meatplow
    > greg ta meatplow.com
    >
    >
    > Thanks again.
    >
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