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iptables and NAT inside VE [message #34584]

Mon, 19 January 2009 13:39

digidax
Messages: 30
Registered: March 2008

Member

Hello,

I'm doing inside the VE the iptables command on shell and get an error:

# iptables -t nat -A PREROUTING -s 0.0.0.0/0 -p tcp --dport 80 -j REDIRECT --to-port 8080
iptables v1.3.5: can't initialize iptables table `nat': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

On the HN I have expand in /etc/vz/vz.conf the line with iptables_nat:

IPTABLES="ipt_REJECT ipt_tos ipt_limit ipt_multiport iptable_filter iptable_mangle ipt_TCPMSS ipt_tcpmss ipt_ttl ipt_length iptables_nat"

Using Kernel: 2.6.18-92.1.13.el5.028stab059.6 #1 SMP

finished with rebooting the HN. What did I have forgot?

best regards
Frank

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Re: iptables and NAT inside VE [message #34594 is a reply to message #34584]

Mon, 19 January 2009 16:51

piavlo
Messages: 159
Registered: January 2007

Senior Member

You need the iptables nat module loaded in HN prior to VE start anyway.
Also add

IPTABLES="iptable_nat"

to /etc/vz/conf/${VEID}.conf

I think that IPTABLES="..." in
/etc/vz/vz.conf is ignored.

[Updated on: Mon, 19 January 2009 16:52]

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*SOLVED*: iptables and NAT inside VE [message #34595 is a reply to message #34584]

Mon, 19 January 2009 17:16

digidax
Messages: 30
Registered: March 2008

Member

Yes, I've did it. See last word in my IPTABLES="... iptables_nat" line and have rebooted the whole machine in case of increasing DDR2 RAM.

I have recreated the VE again and now it's working. I don't know what's the problem was but now it's running.

Thanks.

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Re: *SOLVED*: iptables and NAT inside VE [message #34598 is a reply to message #34595]

Mon, 19 January 2009 19:06

piavlo
Messages: 159
Registered: January 2007

Senior Member

digidax wrote on Mon, 19 January 2009 19:16

I have recreated the VE again and now it's working. I don't know what's the problem was but now it's running.

Thanks.

The problem was that you needed the iptables nat module loaded in HN prior to that you start the VE

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Re: *SOLVED*: iptables and NAT inside VE [message #34602 is a reply to message #34598]

Tue, 20 January 2009 06:22

digidax
Messages: 30
Registered: March 2008

Member

Sorry, I think you misunderstand me. I have rebooted the whole Hardware:
# shutdown -h now

After starting the machine by pressing the power on button, first is booting the host OS and then initialized the VZ subsystem, next step is starting the VE's. So my changes on IPTABLES are done and executed.

The simplest way is stopping VZ subsystem and
# service iptables restart
and starting the VZ subsystem. But I have plugged additional RAM on board, so I must switched off.

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