topic Business Hub 3 - Port 161 Open in Archive

Business Hub 3 - Port 161 Open

WelshGrass — Sat, 11 Aug 2012 13:24:19 GMT

Hi,

I recently got a BT Business Hub 3 (as a free upgrade - thank you BT!). Much smaller than the HGV2700 and installed no problem.

With ANY new network kit I always check it out on GRC Shields Up! Port 161 (SNMP) was wide open! There is huge debate about this over on the BT Home forums where people are not happy about the Home Hub 3 leaving open this port (and Port 4567 apparently).

Should I be worried that this port is open (as far as I am aware there is nothing my side of the firewall running SNMP) rather than stealthed?

Should I use port forwarding to stealth this port?

Any help / advice appreciated.

Re: Business Hub 3 - Port 161 Open

iptables101 — Sat, 11 Aug 2012 18:58:45 GMT

SNMP is always open by default. I found this opened at Netgear routers too. This makes it possibly to set up a monitoring system like Opennms without a hassle.

You can always close this port whenever you don't need to monitor this.

Re: Business Hub 3 - Port 161 Open

MrBMChitlin — Wed, 15 Aug 2012 11:10:51 GMT

Can you tell me how to turn it off ?

Re: Business Hub 3 - Port 161 Open

DaveA — Wed, 15 Aug 2012 12:06:36 GMT

Hi,

From what I have read about it you should close it unless you use it yourself. Unfortunately I don't have any information as to why it's open in the first place.

Dave