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Auth and 127.0.1.51

Discussion in 'Plesk for Linux - 8.x and Older' started by sharingsunshine@, Oct 24, 2005.

  1. sharingsunshine@

    sharingsunshine@ Guest

    0
     
    Hello,

    I found this entry in my LogWatch.

    --------------------- Connections (secure-log) Begin ------------------------

    Connections:
    Service auth:
    127.0.1.51: 1 Time(s)

    I have port 113 - Auth locked down via the Plesk Firewall module. Here is the information.

    ********************

    #!/bin/sh
    #
    # Automatically generated by Plesk netconf
    #

    set -e

    echo 0 > /proc/sys/net/ipv4/ip_forward
    ([ -f /var/lock/subsys/ipchains ] && /etc/init.d/ipchains stop) >/dev/null 2>&1 || true
    (rmmod ipchains) >/dev/null 2>&1 || true
    /sbin/iptables -F
    /sbin/iptables -X
    /sbin/iptables -Z
    /sbin/iptables -P INPUT DROP
    /sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
    /sbin/iptables -A INPUT -p tcp ! --syn -j REJECT --reject-with tcp-reset
    /sbin/iptables -A INPUT -m state --state INVALID -j DROP
    /sbin/iptables -P OUTPUT DROP
    /sbin/iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
    /sbin/iptables -A OUTPUT -p tcp ! --syn -j REJECT --reject-with tcp-reset
    /sbin/iptables -A OUTPUT -m state --state INVALID -j DROP
    /sbin/iptables -P FORWARD DROP
    /sbin/iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
    /sbin/iptables -A FORWARD -p tcp ! --syn -j REJECT --reject-with tcp-reset
    /sbin/iptables -A FORWARD -m state --state INVALID -j DROP
    /sbin/iptables -A INPUT -i lo -j ACCEPT
    /sbin/iptables -A OUTPUT -o lo -j ACCEPT
    /sbin/iptables -A FORWARD -i lo -o lo -j ACCEPT
    /sbin/iptables -t mangle -F
    /sbin/iptables -t mangle -X
    /sbin/iptables -t mangle -Z
    /sbin/iptables -t mangle -P PREROUTING ACCEPT
    /sbin/iptables -t mangle -P OUTPUT ACCEPT
    /sbin/iptables -t mangle -P INPUT ACCEPT
    /sbin/iptables -t mangle -P FORWARD ACCEPT
    /sbin/iptables -t mangle -P POSTROUTING ACCEPT
    /sbin/iptables -t nat -F
    /sbin/iptables -t nat -X
    /sbin/iptables -t nat -Z
    /sbin/iptables -t nat -P PREROUTING ACCEPT
    /sbin/iptables -t nat -P OUTPUT ACCEPT
    /sbin/iptables -t nat -P POSTROUTING ACCEPT

    /sbin/iptables -A INPUT -p tcp --dport 8443 -s 220.225.128.155 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 23 -j DROP
    /sbin/iptables -A INPUT -p udp --dport 23 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 106 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 113 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 143 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 465 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 631 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 953 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 993 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 995 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 3000 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 3306 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 8443 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 8443 -s 216.40.228.128/25 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 8443 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 80 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 443 -j ACCEPT

    /sbin/iptables -A INPUT -p tcp --dport 21 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 21 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 22 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 22 -s 216.40.228.128/25 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 22 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 25 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 465 -j ACCEPT

    /sbin/iptables -A INPUT -p tcp --dport 110 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 995 -j ACCEPT

    /sbin/iptables -A INPUT -p tcp --dport 143 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 993 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 143 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 993 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 106 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 106 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 3306 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 3306 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 5432 -j DROP

    /sbin/iptables -A INPUT -p tcp --dport 9008 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 9080 -j DROP

    /sbin/iptables -A INPUT -p udp --dport 137 -j DROP
    /sbin/iptables -A INPUT -p udp --dport 138 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 139 -j DROP
    /sbin/iptables -A INPUT -p tcp --dport 445 -j DROP

    /sbin/iptables -A INPUT -p udp --dport 1194 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p udp --dport 1194 -j DROP

    /sbin/iptables -A INPUT -p udp --dport 53 -j ACCEPT
    /sbin/iptables -A INPUT -p tcp --dport 53 -j ACCEPT

    /sbin/iptables -A INPUT -p icmp --icmp-type 8/0 -s 69.34.35.58 -j ACCEPT
    /sbin/iptables -A INPUT -p icmp --icmp-type 8/0 -j DROP

    /sbin/iptables -A INPUT -j ACCEPT

    /sbin/iptables -A OUTPUT -j ACCEPT

    /sbin/iptables -A FORWARD -j DROP

    echo 1 > /proc/sys/net/ipv4/ip_forward
    echo 1 > /usr/local/psa/var/modules/firewall/ip_forward.active
    chmod 644 /usr/local/psa/var/modules/firewall/ip_forward.active
    #
    # End of script
    #

    *******************

    I have two questions.

    1. Is this a sign of a hacker in my system?

    2. Is there anything else I can do to strengthem my firewall rules?

    Thanks,

    Randal
     
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