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Binding to low ports under linux 2.6.24+ using setcap #37

lotaris-xx opened this Issue Jun 15, 2010 · 1 comment


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commented Jun 15, 2010

The website lists a few ways under BSD/Solaris to bind to priv ports as a normal user.

There is a similar solution under linux that doesn't require something like authbind. If you are running 2.6.24 or later (or a vendor kernel with capabilities).

setcap 'cap_net_bind_service=+ep' /usr/bin/erl

[Note: that is probably a symlink, you need to run setcap on the dest.]

After this erl will be allowed to bind to low ports.

Or something like:

setcap 'cap_net_bind_service=+ep' /usr/lib/erlang/erts-5.7.4/bin/beam for running apps.

Note also that capabilities will be cleared when you install a new version of erlang.


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commented Jun 15, 2010

At last - this should have been done 10 years ago. I'll it to the docs - thanks

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