Re: TCP port 139

February 23rd, 2001, 08:23 AM

Hi! does anyone knows what TCP port 139 does it is only activated when clients for MS network is installed what will happen if i close this port

February 23rd, 2001, 09:16 AM

i would think that if you would close the port any other computer would not be able to connect to that pc, the port number isnt important you can use any port as long as the other puters can comunicate throu that port

February 23rd, 2001, 04:40 PM

I believe port 139 is for NetBIOS calls. It is something internal like that. It is what a lot of the DoS (Denial Of Service) attacks used.

Gabriel · February 25th, 2001, 05:59 AM

Quote:

<font face="Verdana, Arial" size="2">Originally posted by SuBz:
I believe port 139 is for NetBIOS calls. It is something internal like that. It is what a lot of the DoS (Denial Of Service) attacks used.</font>

Right
netbios-ssn 139/tcp NETBIOS Session Service
netbios-ssn 139/udp NETBIOS Session Service

goto www.faqs.org
search for RFC #1700

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February 23rd, 2001, 08:23 AM	#1
kababoom Guest Posts: n/a	Re: TCP port 139 Hi! does anyone knows what TCP port 139 does it is only activated when clients for MS network is installed what will happen if i close this port

February 23rd, 2001, 09:16 AM	#2
n8dawg Guest Posts: n/a	i would think that if you would close the port any other computer would not be able to connect to that pc, the port number isnt important you can use any port as long as the other puters can comunicate throu that port

February 23rd, 2001, 04:40 PM	#3
SuBz Guest Posts: n/a	I believe port 139 is for NetBIOS calls. It is something internal like that. It is what a lot of the DoS (Denial Of Service) attacks used.