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[Samba] Make nmbd bind to interfaces only

I would like to have nmbd only bind to the interfaces specified in the interfaces line of smb.conf, in the same way that smbd does. When researching this I did come across a mailing list thread saying there was no use case, but I think I have one.

For many years ClearOS has been providing NT4 style domains and unix-style shares. M$ upset the applecart last year with their 1803 update when joining NT4 domains got broken (it has since been fixed since September '18, but I would assume the writing is on the wall for NT4 domains).

To get round the issue I loaded samba into docker using the https://github.com/Fmstrat/samba-domain container. I wanted to continue to use the ClearOS samba configuration (v4.7.1 and soon to follow Centos to 4.8.3) for its file-sharing as a domain member. One of the problems I had was that if the native ClearOS instance of samba was started, the docker instance would refuse to start because of a port clash. To get round this for smbd was easy. All I had to do was bind to interfaces only, but nmbd would not obey. For nmbd I had to set:

nmbd bind explicit broadcast = yes
socket address =

This is sort of OK if I have one LAN interface, but ClearOS is, among other things, a router/firewall and as such can have multiple LAN and/or VLAN interfaces. Socket address can only have one IP address so I can't get all LAN interfaces to bind to it. Is there a way round this or does it make a reasonable use case for a modification request.



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