What is the protocol number of NETBIOS over IEEE 802.2 ethernet?

What is the protocol number of NETBIOS over IEEE 802.2 ethernet?

[Bassam A. Al-Khaffaf]

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Hi Guys,
   I am trying to DNAT the netbios broadcast traffic (03:00:00:00:00:01)
over IEEE 802.2 ethernet. So is there any number for this protocol so I
can use it with my iptables rule?
 
Note: I am asking for netbios protocol over IEEE 802.2 ethernet and not
over Ethernet II
 
For example:
 
iptables –t nat –A PREROUTING -i eth1 –p netbios –j DNAT –to-destination
192.168.1.231
 
Thanks for your help
 
Bassam

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Re: What is the protocol number of NETBIOS over IEEE 802.2 ethernet?

[Antony Stone]

On Monday 14 June 2004 9:57 am, Bassam A. Al-Khaffaf wrote:

> Hi Guys,
>    I am trying to DNAT the netbios broadcast traffic (03:00:00:00:00:01)
> over IEEE 802.2 ethernet. So is there any number for this protocol so I
> can use it with my iptables rule?

IPtables means IP tables :)   If you're not using IP (over ethernet, or 
anything else as a transport medium), then you can't use IPtables to filter 
it.

Maybe you need to look at EBtables (Ethernet Bridge filtering) 
http://ebtables.sourceforge.net ?

Regards,

Antony.

-- 
"Black holes are where God divided by zero."

 - Steven Wright

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Re: What is the protocol number of NETBIOS over IEEE 802.2 ethernet?

[John A. Sullivan III]

On Mon, 2004-06-14 at 04:57, Bassam A. Al-Khaffaf wrote:
> Hi Guys,
> 
>    I am trying to DNAT the netbios broadcast traffic
> (03:00:00:00:00:01) over IEEE 802.2 ethernet. So is there any number
> for this protocol so I can use it with my iptables rule?
> 
>  
> 
> Note: I am asking for netbios protocol over IEEE 802.2 ethernet and
> not over Ethernet II
> 
>  
> 
> For example:
> 
>  
> 
> iptables –t nat –A PREROUTING -i eth1 –p netbios –j DNAT
> –to-destination 192.168.1.231
> 
<snip>
NetBIOS generally uses three different protocols:

NetBIOS datagram service - 138 /udp - most data transmission

NetBIOS name service - 137 /udp - probably what you need for
registration

NetBIOS session service - 139 /tcp - I'm not sure what uses session
oriented NetBIOS

As I mentioned in response to your previous post, I generally try to
avoid the use of NetBIOS broadcasts and far prefer a name server
approach on both routed and bridged networks.

-- 
John A. Sullivan III
Chief Technology Officer
Nexus Management
+1 207-985-7880
john.sullivan@nexusmgmt.com
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