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Sammy00 Posted:
Has anyone setup a
W52p phone for
vonage? I have
a W52p with two
wireless handsets,

In The Forum:
Hard Wiring - Installation
W52p Setup
On Aug 30, 2016 at 10:38:01

James44 Posted:
Hi, I am
looking for a good
Sip Trunking
provider in
Canada. they
should offer

In The Forum:
A good sip trunking provider
On Jul 17, 2016 at 23:42:46

James44 Posted:
Which network
connection do you

In The Forum:
Wireless Access Point plugged into switch
On Jul 13, 2016 at 22:55:00

jjatsk Posted:
We are renting a
few offices right
next door to our
main building. I
have a wireless

In The Forum:
Wireless Access Point plugged into switch
On Jul 09, 2016 at 12:00:54

Pman Posted:
Hello, While
Vonage has been a
great service over
the years, it is
time to part

In The Forum:
LNP – Local Number Portability
Cannot port phone number to new carrier - repeated failures
On Jul 05, 2016 at 09:12:07

jbugz67 Posted:
We recently
purchased 5
Polycom VVX 300
phones from
Vonage, and have

In The Forum:
Nothing but problems with VVX300
On Apr 15, 2016 at 14:58:07

RichardPi Posted:
Hello, does
anybody recollect
how to get into
wifi password from
diggings router?

In The Forum:
Hard Wiring - Installation
How to arrive at wifi password?
On Mar 31, 2016 at 02:39:07

RichardPi Posted:
Hello, does
anybody know how
to get into wifi
watchword from
home router?

In The Forum:
Hard Wiring - Installation
How to be noised abroad wifi password?
On Mar 30, 2016 at 18:48:05

achow26 Posted:
BrettaMan, I am
having the same
problem. I do not
have the loopback
plug. I tried

In The Forum:
Hard Wiring - Installation
Vonage issue with USTec UX-226
On Feb 16, 2016 at 14:13:37

alicesmith Posted:
I have used the
PBX phone system
in my new office.
I was very
confused about

In The Forum:
IP PBX for small business
On Jan 29, 2016 at 01:49:14

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Vonage Well I did not answer his question in the original post since it was posted by someone

Well I did not answer his question in the original post since it was posted by someone else 1 year ago and he reopened it today. It is fine that people are curious and want to better understand why things are the way they are especially those who are security conscious. As long as those who are security conscious are network professional themselves and are not just going off of hear say by someone who believes they are a network professional..

In a case like this, one must first understand that the code base in the VDV21 is linux based which means it uses a form of iptables. Next, one must understand how an iptables firewall works. There are drop and reject statements that can be used. Depending upon which line in the iptables uses drop / reject for each port or service is only known to the chipset developers who wrote the code. Each will provide a different result such as Closed vs Filtered.

Closed Port:
- If you send a SYN to a closed port, it will respond back with a RST.
Open Port:
- If you send a SYN to an open port, you should receive a SYN/ACK.
Filtered Port:
- The packet is simply dropped and you receive no response (not even a RST).

I have personally just run a port scan using NMAP from a linux box against the WAN port of a VDV21 and the only known ports that show up are 8080 tcp as Open because the Web Remote Management is Enabled and 10000 tcp as Closed. If I scan just tcp port 22 it shows as Filtered just as every other port that is not in use. So from what I see since the WAN port shows tcp port 22 as Filtered, this would be Stealth based upon the definition of what Filtered and Closed are.

I then ran another port scan after enabling ssh in the VDV21 and it showed as Open as expected.

After disabling ssh, I ran another scan and sure enough, it now shows up as Closed. So it looks like the ssh service was off by default until I turned it on and the iptables entry filtered the port. After turning on ssh for the first time, it turns the service on and creates an iptables entry to allow connections. After disabling ssh, it then leaves the iptables entry which will allow connections when the service is running so therefore is no longer filters port 22. This is what would cause it to show up as a Closed port since the firewall does allow it but the service is just not listening on this port because it is disabled.

It is possible that a factory reset will set it back to a filtered state if it believes the ssh service was never enabled. However, since I am remotely accessing the VDV21 right now, I cannot test this out otherwise I will lose the ability to log back into the web interface to test other things.

Read The Full Thread:

V-Portal - Port 22?

Hello, After a series of tests I've concluded that the issue I'm having is
Port 22 is used for secure shell for troubleshooting purposes but is disabled
Could someone please go over with me the procedure for forwarding Port 22? I did
The port is not enabled. If it were enabled, when sniffing for this port, it would
OK, you did a good job telling us that port 22 can only be enabled by the used when
If you want it stealthed then you need to put it behind another router or firewall
tchmgr I don't know why you are wasting your time. You answered his question 3 times
:? I have been using a VDV21 for over a year, and recently moved to North Carolina

VonTechMgr posted "Well I did not answer his question in the original post since it was posted by someone" on 11/27/2009

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