[GH-ISSUE #253] Block port access #180

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opened 2026-05-05 05:15:28 -06:00 by gitea-mirror · 1 comment

gitea-mirror commented

2026-05-05 05:15:28 -06:00

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Originally created by @tinfoil123 on GitHub (Jan 22, 2016).
Original GitHub issue: https://github.com/netblue30/firejail/issues/253

How do I stop a firejailed program from accessing port X?

Originally created by @tinfoil123 on GitHub (Jan 22, 2016). Original GitHub issue: https://github.com/netblue30/firejail/issues/253 How do I stop a firejailed program from accessing port X?

gitea-mirror

2026-05-05 05:15:28 -06:00

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gitea-mirror commented

2026-05-05 05:15:36 -06:00

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@netblue30 commented on GitHub (Jan 23, 2016):

You need to create a network namespace and install your own iptables filter. Example:

$ firejail --net=eth0 --netfilter=/etc/firejail/nolocal.net firefox

I have some sample netfilters in /etc/firejail/*.net. Take one of them and modify it. It has the same syntax as iptables - in fact I am using iptables-restore to install the filter inside the sandbox.

@netblue30 commented on GitHub (Jan 23, 2016): You need to create a network namespace and install your own iptables filter. Example: $ firejail --net=eth0 --netfilter=/etc/firejail/nolocal.net firefox I have some sample netfilters in /etc/firejail/*.net. Take one of them and modify it. It has the same syntax as iptables - in fact I am using iptables-restore to install the filter inside the sandbox.

gitea-mirror referenced this issue

2026-05-05 10:03:34 -06:00

[PR #180] [MERGED] add google-chrome{,-stable,-beta,-unstable}.profile #3556

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Reference: github-starred/firejail#180

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