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On Friday, 19 April 2013 14:21 -0000,
in article <slrnkn2ktc....@mbp55.local>,
Lewis <g.k...@gmail.com.dontsendmecopies> wrote:
> In message <
alpine.OSX.2.00.1...@mako.ath.cx>
> David Ritz <
dr...@mindspring.com> wrote:
>> On Friday, 19 April 2013 08:52 -0400,
>> in article <51713df1$0$38242$c3e8da3$
f626...@news.astraweb.com>,
>> Warren Oates <
warren...@gmail.com> wrote:
>>> That's a business router; upnp isn't in the settings. You'll have to
>>> add your own inbound rule, open the appropriate ports, etc.
>> upnp 1900/tcp 0.003977 # Universal PnP
>> upnp 1900/udp 0.136543 # Universal PnP
>> upnp 5000/tcp 0.006423 # Universal PnP, also Free Internet Chess Server
>> upnp 5000/udp 0.008913 # also complex-main
> If you have UPnP open, go to
grc.com and run the shields-up and make
> sure your router isn't one of the millions that opens UPnP to the
> world. That is dangerous. Dangerous enough that some ISPs have taken
> to blocking port 1900.
> If your router does UPnP properly (that is, only on the LAN side)
> then it's fine.
One should not need to open a world facing port, in order to use UPnP
on the LAN side. Doing so is a significant security issue, leaving
one's network vulnerable to a plethora of exploit attacks.
Looking at the WAN side:
% nmap -p 1900,5000
mako.ath.cx
Starting Nmap 5.00 (
http://nmap.org ) at 2013-04-19 07:50 PDT
Interesting ports on
mako.ath.cx (75.56.239.73):
PORT STATE SERVICE
1900/tcp closed upnp
5000/tcp closed upnp
Nmap done: 1 IP address (1 host up) scanned in 0.28 seconds
Looking at the LAN side of the router:
$ nmap -p 1900,5000 192.168.1.254
Starting Nmap 6.25 (
http://nmap.org ) at 2013-04-19 09:53 CDT
Nmap scan report for 192.168.1.254
Host is up (0.0086s latency).
PORT STATE SERVICE
1900/tcp closed upnp
5000/tcp closed upnp
Nmap done: 1 IP address (1 host up) scanned in 0.12 seconds
Looking at this box, from itself.
$ nmap -p 1900,5000 localhost
Starting Nmap 6.25 (
http://nmap.org ) at 2013-04-19 10:05 CDT
Nmap scan report for localhost (127.0.0.1)
Host is up (0.0020s latency).
PORT STATE SERVICE
1900/tcp closed upnp
5000/tcp closed upnp
Nmap done: 1 IP address (1 host up) scanned in 0.04 seconds
If Bill Taylor needs to use UPnP _on his LAN_, he should only needs to
open the appropriate ports on the box where he wants to use it, not on
the hardware firewall or WAN facing router.
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99sAoLvd1OoDdDg57L3KG5EHVAcAzLMH
=c/tQ
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