Firewall config and ftp server

[Rick Stevens]

On 03/09/2010 07:47 PM, NoSpaze wrote:
> Am Dienstag, den 09.03.2010, 23:09 +0800 schrieb Edward. S. P. Leong:
>> NoSpaze wrote:
>>> # modprobe ip_tables
>>> FATAL: Module ip_tables not found.
>
> Again: this module does not exist! Maybe ip_nat or nf_nat?

To clarify, several kernels ago the IPV4 iptables was defaulted to being
built into the kernel so it doesn't need a modprobe or insmod.  Ditto
with the IPV4 conntrack (snippet of the default kernel config file):

CONFIG_NF_DEFRAG_IPV4=y  <<<---- Built into kernel
CONFIG_NF_CONNTRACK_IPV4=y  <<<---- Built into kernel
# CONFIG_NF_CONNTRACK_PROC_COMPAT is not set
CONFIG_IP_NF_QUEUE=m  <<<---- Module
CONFIG_IP_NF_IPTABLES=y  <<<---- Built into kernel

So remove those items from your /etc/modprobe.conf file.  It is also not 
necessary to modprobe things like the NAT module and such...if
there are rules in your iptables config that require them, they'll
be drug in by iptables itself.  The "modprobe"able modules can be
found by doing a

	ls /lib/modules/`uname -r`/kernel/net/ipv4/netfilter

Note that the IPV6 versions of those modules ARE built as modules and
will need to be either modprobed or drug in as part of the iptables
rulesets.

Keep in mind that the /etc/modprobe.conf file has been deprecated in
favor of the /etc/modprobe.d/local.conf file.

>>> # modprobe ip_nat_ftp
>>> # modprobe ip_conntrack
>>> FATAL: Module ip_conntrack not found.
>>> # modprobe ip_conntrack_ftp
>>> You do not show the output of this three commands, this is mine.
>>> Matches your setup?
>
>> Dear You,
>> Mine in here :
>> []# modprobe ip_tables
>> WARNING: Deprecated config file /etc/modprobe.conf, all config files
>> belong into /etc/modprobe.d/.
>> FATAL: Module ip_tables not found.
>> []# modprobe ip_nat_ftp
>> WARNING: Deprecated config file /etc/modprobe.conf, all config files
>> belong into /etc/modprobe.d/.
>> []# modprobe ip_conntrack
>> WARNING: Deprecated config file /etc/modprobe.conf, all config files
>> belong into /etc/modprobe.d/.
>> FATAL: Module ip_conntrack not found.
> (same as mine)
>> []# modprobe ip_conntrack_ftp
>> WARNING: Deprecated config file /etc/modprobe.conf, all config files
>> belong into /etc/modprobe.d/.
>
> Ok. maybe some names are messed up on your modules.conf, maybe you have
> names like nf_nat_ftp and nf_conntrack_ftp. Check this commands outputs:
>
> # ls -l /lib/modules/$(uname -r)/kernel/net/ipv4/netfilter/
>
> # modinfo nf_nat_ftp nf_conntrack_ftp
>
> filename:       /lib/modules/2.6.32.9-67.fc12.i686/kernel/net/ipv4/netfilter/nf_nat_ftp.ko
> alias:          ip_nat_ftp
> description:    ftp NAT helper
> author:         Rusty Russell<rusty at rustcorp.com.au>
> license:        GPL
> srcversion:     F92EE3A32D64466A49CF33B
> depends:        nf_nat,nf_conntrack_ftp
> vermagic:       2.6.32.9-67.fc12.i686 SMP mod_unload 686
>
> filename:       /lib/modules/2.6.32.9-67.fc12.i686/kernel/net/netfilter/nf_conntrack_ftp.ko
> alias:          nfct-helper-ftp
> alias:          ip_conntrack_ftp
> description:    ftp connection tracking helper
> author:         Rusty Russell<rusty at rustcorp.com.au>
> license:        GPL
> srcversion:     BCE75C1712FB8C7DF825917
> depends:
> vermagic:       2.6.32.9-67.fc12.i686 SMP mod_unload 686
> parm:           ports:array of ushort
> parm:           loose:bool
>
> # cat /proc/modules |grep nf
>
> nf_nat_ftp 2452 0 - Live 0xf7dad000
> nf_nat 15785 1 nf_nat_ftp, Live 0xf8881000
> nf_conntrack_ftp 9435 1 nf_nat_ftp, Live 0xf8857000
> nf_conntrack_ipv6 14859 2 - Live 0xf9ee2000
> ipv6 223738 22 ip6t_REJECT,nf_conntrack_ipv6, Live 0xf9e76000
>
>> So, is there any solution for me ?
>
> Good: read, fix. Bad: update/reinstall. Ugly: pay. Greets.
> ----------------------------------------------
> Rodolfo Alcazar Portillo - nospaze at gmail.com
> otbits.blogspot.com / counter.li.org: #367962
> ----------------------------------------------
> An ASCII character walks into a bar and orders a double. "Having a
> bad day?" asks the barman. "Yeah, I have a parity error," replies the
> ASCII character. The barman says, "Yeah, I thought you looked a bit
> off."
> -- Skud
>
>


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