nmblookup & firewall - Suse

This is a discussion on nmblookup & firewall - Suse ; opensuse 10.2 64bit Im trying to get netbios name resolution between 2 linux boxes. Samba is running on one just fine with WINS support enabled. On the other(client) trying to do a 'nmblookup sambabox' fails, unless I turn off IT'S ...

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Thread: nmblookup & firewall

  1. nmblookup & firewall

    opensuse 10.2 64bit

    Im trying to get netbios name resolution between 2 linux boxes. Samba is
    running on one just fine with WINS support enabled. On the other(client)
    trying to do a 'nmblookup sambabox' fails, unless I turn off IT'S
    firewall. With it's firewall on I've tried all kinds of settings to try
    to open the firewall to that broadcast but it wont work. Strange that it
    blocks client from receiving its own broadcast reply...?

    I found some information that suggests the kind of broadcast resolution
    im trying to do just wont work with a linux firewall. Is that the case?

  2. Re: nmblookup & firewall

    On Wed, 12 Sep 2007 09:54:13 -0700
    takeaway wrote:

    > opensuse 10.2 64bit
    >
    > Im trying to get netbios name resolution between 2 linux boxes. Samba
    > is running on one just fine with WINS support enabled. On the
    > other(client) trying to do a 'nmblookup sambabox' fails, unless I
    > turn off IT'S firewall. With it's firewall on I've tried all kinds of
    > settings to try to open the firewall to that broadcast but it wont
    > work. Strange that it blocks client from receiving its own broadcast
    > reply...?
    >
    > I found some information that suggests the kind of broadcast
    > resolution im trying to do just wont work with a linux firewall. Is
    > that the case?

    Hi
    Use wireshark (ethereal) to do a packet capture with the firewall on,
    then do one with the firewall off to see what is happening.

    --
    Cheers Malcolm (Linux Counter #276890)
    SLED 10.0 SP1 x86_64 Kernel 2.6.16.53-0.8-smp
    up 2 days 16:40, 3 users, load average: 0.01, 0.05, 0.06

  3. Re: nmblookup & firewall

    takeaway wrote:

    > opensuse 10.2 64bit
    >
    > Im trying to get netbios name resolution between 2 linux boxes. Samba is
    > running on one just fine with WINS support enabled. On the other(client)
    > trying to do a 'nmblookup sambabox' fails, unless I turn off IT'S
    > firewall. With it's firewall on I've tried all kinds of settings to try
    > to open the firewall to that broadcast but it wont work. Strange that it
    > blocks client from receiving its own broadcast reply...?
    >
    > I found some information that suggests the kind of broadcast resolution
    > im trying to do just wont work with a linux firewall. Is that the case?


    The only way I have been able to do it is to turn off the firewall.
    It's a known bug that has been around since the beginning of the firewall,
    fixed in one version of 9.3 and back again in all 10.x versions including
    10.3 Beta3. See Bug #243809 at
    https://bugzilla.novell.com/show_bug.cgi?id=243809
    It does have some suggestions.

    I would rather do things a different way, like usb flash (and keep the
    firewall intact) or something to eliminate the data being made Win
    compatable and then changed back to Linux compatable. It works, buy why
    not a direct Linux-Linux LAN transfer without all the Win smb stuff? I'm
    eliminating Win boxes everywhere possible, so I may soon not even need smb
    and other 'fudge it down to their level' stuff.

    John


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