[Samba] multi subnetted network (was: CIDR notation in config file)

Sharp, Clint clint.sharp at attws.com
Mon Dec 29 15:01:50 GMT 2003

> -----Original Message-----
> I have a slightly different problem, but it is veeery 
> similar: I have a number of machines with variu\ous OS, some 
> uses real M$ 
> client/server, other use samba (in server mode).
> These are set in a MS domain .
> most machine have a 192.168.a.* address , other a public b.c.d.* 
> address , the PDC and BDC have two NIC on both networks.
> It works fine.
> However i have some [win 2k] clients that are either on b.c.e.* and 
> 192.169.f.* or worse are behind a natting firewall that convert 
> [symmetrically dnat/snat] the private addresses thay have in 
> a "remote" 
> rentwork into unique b.c.d.* addresses .
> While if i login locally and try to access remote servers i 
> have almost no 
> problem (except a very, very, interesting effect, see below) 
> if i stay 
> outside one of the "home"network i have the following problems:
> (note: the routers are linux server with statical routes and 
> no firewalling 
> active, all addresses, either private or public are static) 
>   1. I cannot add new windows hosts to the domain, since it 
> say that no
>       domain server is found, althought if i plug in one of the home
>       networks i can add
>   2. Once i have added and move to the "remote" network i cannot use
>       the authenthication of user at login, since it say thet 
> PDC is not
>       reacheable. However i can, if i login as a local user, 
> access to the
>       shares in that host, that ask me domain/username/password [so
>      i can corfirm that routing is really working]
>    3. From machine behind DNAT/SNAT i cannot even change
>      permissions since i cannot get the list of user/group 
> from domain !  . 4. the final problem, that I mentioned before:
>       From machines behind NAT i can access the server but ...
>       If the client is XP pro i can access only 
>       server with win2k or samba3.0 . No luck with hosts with NT4 sp6
>       But if i plug it in the home networks, directly, i can 
> access the NT4
>       servers again.. Win2k works ok, instead !
> Any idea/ihint/explaination/ ?

This seems like a Windows browsing problem, which would exist for
machines not on the same subnet.  Do you have wins support = yes in your
smb.conf and the machines on all subnets set to use your Samba server as
the WINS server?  This should get you around most of your
browsing-related issues.


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