[Samba] what is nmbd doing on all interfaces?
thiagolima at webforce.com.br
Fri Feb 6 10:49:21 GMT 2004
For name service it causes nmbd to bind to ports 137 and 138
the interfaces listed in the interfaces parameter. nmbd
binds to the "all addresses" interface (0.0.0.0) on ports
and 138 for the purposes of reading broadcast messages. If
option is not set then nmbd will service name requests on all
these sockets. If bind interfaces only is set then nmbd
check the source address of any packets coming in on the
cast sockets and discard any that don't match the
addresses of the interfaces in the interfaces parameter list.
unicast packets are received on the other sockets it allows
to refuse to serve names to machines that send packets
arrive through any interfaces not listed in the interfaces
IP Source address spoofing does defeat this simple check,
ever, so it must not be used seriously as a security feature
>From: samba-bounces+thiagolima=webforce.com.br at lists.samba.org
>[mailto:samba-bounces+thiagolima=webforce.com.br at lists.samba.or
>g] On Behalf Of thomas k.
>Sent: Thursday, February 05, 2004 10:11 PM
>To: samba at lists.samba.org
>Subject: [Samba] what is nmbd doing on all interfaces?
>i just noticed the following running netstat:
>udp 0 0 192.168.1.100:137 0.0.0.0:* 19862/nmbd
>udp 0 0 0.0.0.0:137 0.0.0.0:* 19862/nmbd
>udp 0 0 192.168.1.100:138 0.0.0.0:* 19862/nmbd
>udp 0 0 0.0.0.0:138 0.0.0.0:* 19862/nmbd
>in my smb.conf i got:
> interfaces = eth0
> bind interfaces only = yes
>so what is nmbd doing on all interfaces? i hope it is not
>trying to reach other samba servers out there or is it?
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