There had been one similar thread about this question but there is no answer. So I would like to post it again since I need your help.
System: Redhat 2.4.20 (old but this in embedded system)
It has iptables-1.2.6a-2
This system must support IPv4 and IPv6 (IPv6 is enable)and therefore must have firewall for both IPv4 and IPv6. Currently iptables is enable for IPv4.

Questions:
1. Can I enable ip6tables while existing iptables running?
(can iptables and ip6tables co-exist?, Redhat Chapter 7 seems to say 'no' but I need to protect both IPv4 and IPv6)
2. Do I need both? (I do need firewall for both Ipv4 and IPv6)
3. I also found at rpmfind.net: iptables-ipv6-1.2.6a-2.i386.rpm
So now I have 3 packages: iptables, iptables-ipv6 and
ip6tables. What are differences and how these packages work together and which one (or ones) I do (or do not) need?

I thank you very much in advanced anything you can help.

Best regards,

Q14526

1. Generally you can use iptables and ip6tables parallel to each other. However with RedHat it doens't look like it's possible. You might want to try un-installing the iptables, ip6tables, and iptables-ipv6 RPM's and manually installing iptables from netfilter.org. You might have better luck installing it manually, and that way you will have both iptables and ip6tables. I have not personally tried this... but it's worth a shot.... anyone else, please feel free to correct me if I am wrong..

2. Yes, you need both

3. iptables = ipv4, iptables-ipv6 = ipv6, ip6tables = ipv6


Hope this was helpful

Hi ph34r3d,

Thank you very much for your response. It is tremendously helpful. I will follow your suggestion #1.

About my question #3, you said "iptables-ipv6 = ipv6": do you mean that I will keep the existing iptables, just add the iptables-ipv6-1.2.6a-2.i386.rpm to my kernel (since it is only for ipv6)?

I try to get the iptables-ipv6-1.2.6a-2.i386.srpm (source)at rpmfind.net but the link does not work. I have searched google/linux but could not find it. Do you know where I can get that file?

Again, thank you very much for your help.

Best regard,

q14526

iptables-ipv6-1.2.6a-2.i386.rpm is for ipv6.

If you download and install the following, you should have both iptables and ip6tables:


ftp://ftp.netfilter.org/pub/iptables...-1.3.6.tar.bz2