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I am looking for a description of the iptables modules (e.g. nf_conntrack_ftp) that can be loaded when iptables starts: IPTABLES_MODULES directive in /etc/sysconfig/iptables-config
I have been trying to search google for this for hours with no luck.
I would really appreciate if someone could direct me to where I can find this information.
one more thing.. in the iptables config file it says that by default no modules are loaded unless specified in the directive.. however connection tracking does work without adding nf_conntrack in there.. are there some modules that are loaded by default? and if yes, how can we find out which ones these are?
1 iptables does not have a config file, so whatever your looking at is distro specific
2 kernel module loading allows you to load a module that depends on other not yet loaded modules by on-demand loading of the other modules
so "modprobe nf_conntrack_ftp" will also pull in "nf_conntrack"
I would expect this means that nf_conntrack loads nf_conntrack_ftp as well, but when I put nf_conntrack only in the iptables-config file the ftp inspection does not work (ls from remote ftp session). Only when I put nf_conntrack_ftp in the iptables-config file than ftp inspection works.
I would expect this means that nf_conntrack loads nf_conntrack_ftp as well, but when I put nf_conntrack only in the iptables-config file the ftp inspection does not work (ls from remote ftp session). Only when I put nf_conntrack_ftp in the iptables-config file than ftp inspection works.
Any comments on that?
Your reading it back to front.
The modules on the right depend on the ones on the left, the column header kinda gives a hint.
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