08-05-2010 10:56 PM - edited 03-06-2019 12:21 PM
I have cisco 1800 series router and i want to block Netbios on that.
08-05-2010 11:49 PM
Hi Prasad,
Do you have ip helper addess configured on the switch if yes then configure
no ip forward-protocol udp 137
no ip forward-protocol udp 138
no ip forward-protocol udp 139
if not you can configure and apply this access-list:
access-list 110 deny tcp any any range 137 139
access-list 110 deny udp any any eq netbios-ss
access-list 110 deny udp any any eq netbios-dgm
Hope this helps.
JayaKrishna
08-09-2010 06:10 AM
Hi Jayakrishna,
thanks for your support.
But plz tell me that is there any need to configure the ip helper address or not???
08-09-2010 11:04 AM
Prasad,
Here is the answer to your question:
http://www.ciscotaccc.com/kaidara-advisor/iprout/showcase?case=K83798834
There is no need to configure IP helper address if you dont have one. You can still use the access-list to block NETBIOS.
JayaKrishna
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