Issue with netbios

nawafaziz78284 · ‎02-23-2020

Kindly can help me with that issue , actually i'm trying to block the netbios on cisco 4300 router.

i already applied this few command :

ip access-list extended NETBIOS

deny tcp any any eq 135
deny udp any any eq 135

deny tcp any any range 137 139
deny udp any any range 137 139

deny tcp any any eq 445
deny udp any any eq 445

permit ip any any

but the netbios still enable .

please i need your support .

thanks

marce1000 · ‎02-23-2020

- Perhaps this thread may enlighten you further :

https://community.cisco.com/t5/switching/how-to-block-netbios/td-p/1429992

M.

-- Each morning when I wake up and look into the mirror I always say ' Why am I so brilliant ? '
When the mirror will then always repond to me with ' The only thing that exceeds your brilliance is your beauty! '

nawafaziz78284 · ‎02-23-2020

i already did .. but still not blocked .. i hope some body help me to fix this issue .

Joseph W. Doherty · ‎02-23-2020

How are you applying your ACL?

Reason I ask, your ACL will block source to destination only. (It also assumes only "known" ports being used.)

nawafaziz78284 · ‎02-23-2020

Thanks for your support .. And do you know how can i block ( disable ) the netbios .. What is miss in the top command .

Joseph W. Doherty · ‎02-24-2020

Sorry, I don't understand this post.