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Full Discussion: Firewall disable
Top Forums Shell Programming and Scripting Firewall disable Post 302281617 by otheus on Thursday 29th of January 2009 07:31:01 AM
Old 01-29-2009
(2) The /proc filesystem is virtual filesystem specific to some Operating Systems, such as Linux and Solaris. The entries in there can be written to or read from depending on driver- and kernel-specific settings. If an application checks for /proc/net/ip_tables_name and finds it, it assumes that iptables has been installed. So in answer to your second question, the answer is: no script is responsible; it's done by the relevant module or kernel feature.

(1) If you type
Code:
lsmod |grep iptables

and see no output, then iptables is not installed. If it's not installed, you should not see /proc/net/ip_tables_name. Also grep for "ipchains" just in case you have an older version.
 

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IPTABLES-APPLY(8)                                                 iptables 1.6.1                                                 IPTABLES-APPLY(8)

NAME
iptables-apply - a safer way to update iptables remotely SYNOPSIS
iptables-apply [-hV] [-t timeout] [-w savefile] {[rulesfile]|-c [runcmd]} DESCRIPTION
iptables-apply will try to apply a new rulesfile (as output by iptables-save, read by iptables-restore) or run a command to configure iptables and then prompt the user whether the changes are okay. If the new iptables rules cut the existing connection, the user will not be able to answer affirmatively. In this case, the script rolls back to the previous working iptables rules after the timeout expires. Successfully applied rules can also be written to savefile and later used to roll back to this state. This can be used to implement a store last good configuration mechanism when experimenting with an iptables setup script: iptables-apply -w /etc/network/iptables.up.rules -c /etc/network/iptables.up.run When called as ip6tables-apply, the script will use ip6tables-save/-restore and IPv6 default values instead. Default value for rulesfile is '/etc/network/iptables.up.rules'. OPTIONS
-t seconds, --timeout seconds Sets the timeout in seconds after which the script will roll back to the previous ruleset (default: 10). -w savefile, --write savefile Specify the savefile where successfully applied rules will be written to (default if empty string is given: /etc/network/iptables.up.rules). -c runcmd, --command runcmd Run command runcmd to configure iptables instead of applying a rulesfile (default: /etc/network/iptables.up.run). -h, --help Display usage information. -V, --version Display version information. SEE ALSO
iptables-restore(8), iptables-save(8), iptables(8). LEGALESE
Original iptables-apply - Copyright 2006 Martin F. Krafft <madduck@madduck.net>. Version 1.1 - Copyright 2010 GW <gw.2010@tnode.com or http://gw.tnode.com/>. This manual page was written by Martin F. Krafft <madduck@madduck.net> and extended by GW <gw.2010@tnode.com or http://gw.tnode.com/>. Permission is granted to copy, distribute and/or modify this document under the terms of the Artistic License 2.0. iptables 1.6.1 IPTABLES-APPLY(8)
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