How iptables directs to localhost in this series of iptable rules

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Hi, I am relatively new to firewalls and netfilter. I have a Debian Stretch router box running dnsmasq, connected to a VPN. Occasionally dnsmasq polls all of the desired DNS servers to select the fastest. When it does this it responds to replies of the non-selected DNS servers with a icmp type...

2. Cybersecurity

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Hello, I did 2 scripts. The second one is, I hope, more secure. What do you think? Basic connection (no server, no router, no DHCP and the Ipv6 is disabled) #######script one #################### iptables -F iptables -X -t filter iptables -P INPUT DROP iptables -P FORWARD...

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Hello, I was playing around with iptables to setup an isolated system. On a SLES10 system, I ran the below to setup my first draft of rules. I noticed that the rules come into effect immediately and do not require any restart of iptables. iptables -A INPUT -j ACCEPT iptables -A OUTPUT -m...

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Hi I have small home network and I want to block some forums on web When I use this iptables -A INPUT -s forum -j DROP rules is applied but when I restart some of PC rules are not present any more also I tried to save firewall settings iptables-save > /root/dsl.fw but how to...

LEARN ABOUT DEBIAN

ipkungfu

ipkungfu(8)						      System Manager's Manual						       ipkungfu(8)

NAME

       ipkungfu - An iptables-based firewall for Linux

SYNOPSIS

       ipkungfu [ -c ] [ -t ] [ -d ] [ -h ] [ -v ] [ --quiet ] [ --panic ] [ --no-caching

DESCRIPTION

       ipkungfu  is an iptables-based Linux firewall. The primary design goals are security, ease of use, and performance, in that order. It takes
       advantage of advanced features of iptables, tcpwrappers, and the Linux kernel. It also simplifies the configuration of internet	connection
       sharing, advanced routing, and other networking needs.

OPTIONS

       -c  (or	--check)
		   Check whether ipkungfu is loaded, and report any command line options it may have been loaded with.

       -t  (or	--test)
		   Runs  a configuration test, and displays the results.  Note that this does not test or display all configuration options.  This
		   gives you an opportunity to verify that major configuration options are correct before putting them into action.

       -d  (or	--disable)
		   Disables the firewall.  It is important to know exactly what this option does.  All traffic is allowed in and out, and  in  the
		   case  of  a gateway, all NATed traffic is forwarded (the option retains your connection sharing options).  Custom rules are not
		   implemented, and deny_hosts.conf is ignored.

       -f  (or	--flush)
		   Disables the firewall COMPLETELY.  All rules are flushed, all chains are removed.  Any port forwarding or  internet	connection
		   sharing will cease to work.

       -h  (or	--help)
		   Displays brief usage information and exits.

       -v  (or	--version)
		   Displays version information and exits.

       --quiet	   Runs ipkungfu with no standard output

       --panic	   Drops  ALL traffic in all directions on all network interfaces.  You should probably never use this option.	The --panic option
		   is available for the highly unusual situation where you know that an attack is underway but you know of no other  way  to  stop
		   it.

       --failsafe  If  ipkungfu fails, --failsafe will cause all firewall policies to revert to ACCEPT.  This is useful when working with ipkungfu
		   remotely, to prevent loss of remote access due to firewall failure.

       --no-caching
		   Disables rules caching feature.

FILES

       /etc/ipkungfu/ipkungfu.conf
       /etc/ipkungfu/advanced.conf
       /etc/ipkungfu/accept_hosts.conf
       /etc/ipkungfu/deny_hosts.conf
       /etc/ipkungfu/custom.conf
       /etc/ipkungfu/log.conf
       /etc/ipkungfu/redirect.conf
       /etc/ipkungfu/services.conf
       /usr/sbin/ipkungfu
       /usr/share/doc/ipkungfu/AUTHORS
       /usr/share/doc/ipkungfu/README
       /usr/share/doc/ipkungfu/FAQ
       /usr/share/doc/ipkungfu/ChangeLog
       /usr/share/doc/ipkungfu/COPYING

SEE ALSO

       iptables(8).

								   January 2003 						       ipkungfu(8)

UNIX for Advanced & Expert Users