same old, same old - and iptables problem


 
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Special Forums IP Networking same old, same old - and iptables problem
# 1  
Old 11-26-2002
same old, same old - an iptables problem

I'm having a problem with iptables, despite being an old hand with ipchains. I am getting the following message when I try to "start" my iptables:

Quote:
Applying iptables firewall rules: iptables-restore v1.2.6a: can't initialize iptables table `': Table does not exist (do you need to insmod?)
I would usually say that one of the iptables kernel modules isn't loaded, especially if the `' actually read `nat' or `mangle' or something similar.

The output of my lsmod is:

Quote:
Module Size Used by Not tainted
autofs 13348 0 (autoclean) (unused)
3c59x 30640 1
iptable_filter 2412 0 (autoclean) (unused)
ip_tables 14936 1 [iptable_filter]
mousedev 5524 0 (unused)
keybdev 2976 0 (unused)
hid 22244 0 (unused)
input 5888 0 [mousedev keybdev hid]
usb-uhci 26188 0 (unused)
usbcore 77024 1 [hid usb-uhci]
ext3 70368 2
jbd 52212 2 [ext3]
my iptables config is:

Quote:
# ------- Set default policy's for all built-in rules -------
-P INPUT DROP
-P OUTPUT ACCEPT
-P FORWARD DROP

# ------- Allow all ICMP packets to this machine ------------
-A INPUT -p icmp -j ACCEPT

# ------- Allow DNS udp and tcp packets to and from machine -
-A INPUT -p udp --dport 53 -s 0/0 -d 0/0 -b -j ACCEPT
-A INPUT -p tcp --dport 53 -s 0/0 -d 0/0 -b -j ACCEPT

# ------- Allow SSH tcp packets in --------------------------
-A INPUT -p tcp --dport 22 -j ACCEPT

# ------- Allow local packets through -----------------------
-A INPUT -i lo -j ACCEPT
-A OUTPUT -o lo -j ACCEPT
-A FORWARD -i lo -j ACCEPT
I would greatly appreciate any help. I have tried experimenting by removing rules and such, but the only way I have been able to get a clean startup is by having a blank config!

I'm not sure what is causing iptables to try and load a null `' table ... as I understood it the `filter' table is the default table. Also, please tell me to FAQ off if this is a commonly answered question. I've checked UNIX.COM and the homepage mailing lists to no avail.

as an extension of this, I have tried starting just with the rule:

-P INPUT DROP

nothing else, and I still get the same error.

Last edited by sam_pointer; 11-26-2002 at 01:59 PM..
# 2  
Old 11-27-2002
Please post your OS and version (it may matter).

I did notice there are MANY fixes for the save/restore funtions in the latest iptables v1.2.7a (note - 1.2.7 should not be used). It may be that is your 'fix'.

Also, this error shows up on what seems to be every version...this complaint came from someone using the same version as you. I don't have it to test with so you are on your own to see if the 'fix' they give works.
# 3  
Old 11-29-2002
Thanks - I'll try adding some manual rules and see if that works; if so I'll abandon iptables-restore/save and create my own script
./Thanks
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