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Where I can find iptables rules of the virtual router

asked 2018-07-06 06:03:42 -0500

amirdhaoui gravatar image

I installed OpenStack Queens on Ubuntu. I created a virtual router to interconnect Private to external LAN. I am facing connectivity problems and I want to check rules in the router.

Where I can find these rules. Thanks for any help.

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answered 2018-07-06 09:11:43 -0500

amirdhaoui gravatar image

updated 2018-07-06 09:12:10 -0500

I found how:

run this command :

ip netns

You can run a command inside a network namespace using the ip netns exec command. For example, to see the interface configuration inside the DHCP server:

ip netns exec qdhcp-88b1609c-68e0-49ca-a658-f1edff54a264 ip addr

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Run a shell ip netns exec qrouter-xyz /bin/bash, then have fun listing netfilter rules, routing table, source routing ... See https://assafmuller.com/2015/04/15/di..., old but still useful.

Bernd Bausch gravatar imageBernd Bausch ( 2018-07-06 21:17:36 -0500 )edit
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answered 2018-07-09 08:39:13 -0500

tze gravatar image

Openstack for every network device (router, dhcp agent) creates and net namespace, so as correct you find the ip netns returns the net namespaces, so with ip netns exec you can run commands that not know what net namespace mean, or you can use other utilities that can bind directly to linux net namespaces. I preface to run :

ip netns exec <net namespace> bash

and then i start to work in the enviroment as o was without net namespaces.

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answered 2018-07-09 02:15:58 -0500

itlinux gravatar image

ip netns exec qrouter-xxxx bash

iptables -xnvL

will show all the rules but nat

iptables -xnvL -t nat

will show all including the NAT.

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Asked: 2018-07-06 06:03:42 -0500

Seen: 45 times

Last updated: Jul 09