It turns out that I am unable to load kernel modules to a container, since all containers on OpenVZ platforms use the same kernel (unlike Xen). What I needed to do was get in touch with my provider and have them enable iptables for me. After that all rules worked.
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Mar 14, 2015 · The connection tracking modules is responsible for creating and removing the tuples. Note: The tracking of the connections is ALSO used by iptables to do packet matching based on the connection state. The NAT Modules . The NAT modules do the NATing itself. They use the tuples and modify them based on the NATing rules.
Now, looking in the man page for iptables, I'm not sure I see/understand the difference between those two modules, conntrack & state: conntrack: This module, when combined with connection tracking, allows access to the connection tracking state for this packet/connection. NEW meaning that the packet has started a new connection, or otherwise ...
NAT - Network Address Translation Introduction. Network Address Translation generally involves "re-writing the source and/or destination addresses of IP packets as they pass through a router or firewall" ... # Load iptables module: $> modprobe ip_tables # activate connection tracking # ...

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Module documentation; Managing Iptables with Ansible the Easy Way blog post; Installation. To use the iptables_raw module just copy the file into ./library, alongside your top level playbooks, or copy it into the path specified by ANSIBLE_LIBRARY or the --module-path command line option. Examples
Dec 28, 2019 · In Linux box, iptables is implemented in Linux kernel as some kernel modules. Each rule within an IP table consists of a number of classifiers (iptables matches) and one connected action (iptables target).
Oct 03, 2005 · iptables Features. iptables uses the concept of separate rule tables for different kinds of packet processing functionality. These rule tables are implemented as functionally separate table modules. The three primary modules are the rule filter table, the NAT nat table, and the specialized packet-handling mangle table. Each of these three table ...

Iptables modules

Feb 27, 2017 · Google is your friend. Google “iptables” yields 4.6 million references. The first is iptables - Wikipedia - which yields over a pages, staring with: iptables is a user-space application program that allows a system administrator to configure the t... Mar 08, 2012 · And that’s all it takes to get passive mode ftp working behind iptables. One extra note: If your server is NATed behind a physical firewall then you’ll probable need to load the “ip_nat_ftp” iptables module. How to list all loadable modules in iptables (given after the -m flag)? This post proposes to list loadable modules with ls /lib*/iptables/ I don't have this folder with my version (v1.6.0).Additional match options are also available through modules loaded by the iptables command. To use a match option module, load the module by name using the -m option, such as -m <module-name> (replacing <module-name> with the name of the module). A large number of modules are available by default.

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