Show iptables, ebtables etc rules created by libvirt
Clash Royale CLAN TAG#URR8PPP
I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:
<filter name='test' chain='root'>
<rule action='drop' direction='out' priority='-650'>
<ip dstipaddr='8.8.8.8'/>
</rule>
</filter>
<interface type='bridge'>
<source bridge='bridge0'/>
<mac address='00:16:3e:1a:b3:4a'/>
<model type='virtio'/>
<filterref filter='test'/>
</interface>
The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.
I suspect the rules might get created in a different network namespace? And ultimately how to view them?
libvirtd netfilter
asked Dec 30 '18 at 8:21
guckigucki
1012
add a comment |
I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:
<filter name='test' chain='root'>
<rule action='drop' direction='out' priority='-650'>
<ip dstipaddr='8.8.8.8'/>
</rule>
</filter>
<interface type='bridge'>
<source bridge='bridge0'/>
<mac address='00:16:3e:1a:b3:4a'/>
<model type='virtio'/>
<filterref filter='test'/>
</interface>
The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.
I suspect the rules might get created in a different network namespace? And ultimately how to view them?
libvirtd netfilter
asked Dec 30 '18 at 8:21
guckigucki
1012
Remember, there are different tables involved, which can be accesed with the-tflag. Soiptables -t nat -Lwill show the NAT table. Options may includenat,mangle,filter(the default),securityandraw. You may also need some-vflags to show interface names to help distinguish what rules apply
– Stephen Harris
Dec 30 '18 at 14:58
add a comment |
I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:
<filter name='test' chain='root'>
<rule action='drop' direction='out' priority='-650'>
<ip dstipaddr='8.8.8.8'/>
</rule>
</filter>
<interface type='bridge'>
<source bridge='bridge0'/>
<mac address='00:16:3e:1a:b3:4a'/>
<model type='virtio'/>
<filterref filter='test'/>
</interface>
The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.
I suspect the rules might get created in a different network namespace? And ultimately how to view them?
libvirtd netfilter
asked Dec 30 '18 at 8:21
guckigucki
1012
I'm using libvirt with qemu on a ubuntu bionic system. I'd like to inspect what network filtering rules are actually created in the system for the nwfilter rules when I run a qemu/kvm guest with libvirt. I created a a very basic testing rule like this and attached to my domain's only nic:
<filter name='test' chain='root'>
<rule action='drop' direction='out' priority='-650'>
<ip dstipaddr='8.8.8.8'/>
</rule>
</filter>
<interface type='bridge'>
<source bridge='bridge0'/>
<mac address='00:16:3e:1a:b3:4a'/>
<model type='virtio'/>
<filterref filter='test'/>
</interface>
The filter is working as expected, as I can easily test from within the VM. However using iptables -L -n, ebtables -L or even nft list chain inet filter output on the host is not showing any rules.
I suspect the rules might get created in a different network namespace? And ultimately how to view them?
libvirtd netfilter
libvirtd netfilter
asked Dec 30 '18 at 8:21
guckigucki
1012
asked Dec 30 '18 at 8:21
guckigucki
1012
asked Dec 30 '18 at 8:21
guckigucki
1012
asked Dec 30 '18 at 8:21
guckigucki
1012
asked Dec 30 '18 at 8:21
guckigucki
1012
1012
Remember, there are different tables involved, which can be accesed with the-tflag. Soiptables -t nat -Lwill show the NAT table. Options may includenat,mangle,filter(the default),securityandraw. You may also need some-vflags to show interface names to help distinguish what rules apply
– Stephen Harris
Dec 30 '18 at 14:58
add a comment |
Remember, there are different tables involved, which can be accesed with the-tflag. Soiptables -t nat -Lwill show the NAT table. Options may includenat,mangle,filter(the default),securityandraw. You may also need some-vflags to show interface names to help distinguish what rules apply
– Stephen Harris
Dec 30 '18 at 14:58
Remember, there are different tables involved, which can be accesed with the
-t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply– Stephen Harris
Dec 30 '18 at 14:58
Remember, there are different tables involved, which can be accesed with the
-t flag. So iptables -t nat -L will show the NAT table. Options may include nat, mangle, filter (the default), security and raw. You may also need some -v flags to show interface names to help distinguish what rules apply– Stephen Harris
Dec 30 '18 at 14:58
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "106"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);
else
createEditor();
);
function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);
);
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f491554%2fshow-iptables-ebtables-etc-rules-created-by-libvirt%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f491554%2fshow-iptables-ebtables-etc-rules-created-by-libvirt%23new-answer', 'question_page');
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Remember, there are different tables involved, which can be accesed with the
-tflag. Soiptables -t nat -Lwill show the NAT table. Options may includenat,mangle,filter(the default),securityandraw. You may also need some-vflags to show interface names to help distinguish what rules apply– Stephen Harris
Dec 30 '18 at 14:58