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[GH-ISSUE #215] starting/stopping a jail with --net=br0 causes network hiccups #148

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opened 2026-05-05 05:10:18 -06:00 by gitea-mirror · 3 comments

gitea-mirror commented

2026-05-05 05:10:18 -06:00

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Originally created by @the8472 on GitHub (Jan 9, 2016).
Original GitHub issue: https://github.com/netblue30/firejail/issues/215

Symptoms:

ssh sessions and other network traffic into the box hang for several seconds after closing the jail
br0 somehow obtains additional SLAAC-addresses

Speculations on causes:

the host's end of the veth pair is brought up before adding it to the bridge.. maybe it should be added to the bridge first and then brought up
shutting down the veth pair / network namespace is missing some necessary cleanup steps

Originally created by @the8472 on GitHub (Jan 9, 2016). Original GitHub issue: https://github.com/netblue30/firejail/issues/215 Symptoms: - ssh sessions and other network traffic into the box hang for several seconds after closing the jail - br0 somehow obtains additional SLAAC-addresses Speculations on causes: - [the host's end of the veth pair is brought up before adding it to the bridge.](https://github.com/netblue30/firejail/blob/master/src/firejail/network_main.c#L124-L128). maybe it should be added to the bridge first and then brought up - shutting down the veth pair / network namespace is missing some necessary cleanup steps

gitea-mirror

2026-05-05 05:10:18 -06:00

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gitea-mirror commented

2026-05-05 05:10:24 -06:00

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@netblue30 commented on GitHub (Jan 10, 2016):

I put in the veth pair fix you suggested. I'll have to find a way to shut down the interfaces when the namespace is destroyed.

@netblue30 commented on GitHub (Jan 10, 2016): I put in the veth pair fix you suggested. I'll have to find a way to shut down the interfaces when the namespace is destroyed.

gitea-mirror commented

2026-05-05 05:10:27 -06:00

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@chiraag-nataraj commented on GitHub (Aug 22, 2018):

@the8472 Is this still an issue?

@chiraag-nataraj commented on GitHub (Aug 22, 2018): @the8472 Is this still an issue?

gitea-mirror commented

2026-05-05 05:10:30 -06:00

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@chiraag-nataraj commented on GitHub (May 21, 2019):

I'm going to close this for inactivity. @the8472, please feel free to re-open if you have more questions or if this is still an issue.

@chiraag-nataraj commented on GitHub (May 21, 2019): I'm going to close this for inactivity. @the8472, please feel free to re-open if you have more questions or if this is still an issue.

gitea-mirror referenced this issue

2026-05-05 10:03:26 -06:00

[PR #148] [MERGED] Add '"' chars around every argument passed to bash #3547

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Reference: github-starred/firejail#148

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