A port provides a location for an application to interface with the network. If there is no application that is listening at a particular point, data sent there will never be used.

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1answer
927 views

TCP port prioritizing on switch/router (QoS)

I have some HP ProCurve series Switch. There is a QoS option for prioritize traffic by TCP/UDP port. I set two ports: one with highest priority and another with lowest. Then I performed tests to ...
1
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1answer
423 views

Duplicate/Reroute port to another port

I'm running a Windows Server 2008 R2 machine and was curious on if there is any software out there that would allow me to open port 3307 and route any data sent to it to port 3306. For example, if I'm ...
2
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4answers
3k views

Does port forwarding a port on one computer expose other computers in the network as well?

I have read that port forwarding exposes your computer to security breaches. Does port forwarding a port on one computer expose other computers in the network as well?
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0answers
1k views

Setting Up No-IP to talk to my site

I'm doing my head in here, was hoping someone could help me. I'm trying to setup my web server at home. It has a static ip of 192.168.1.8. I've setup IIS on Windows 7 and am hosting my site on port ...
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2answers
644 views

Mail ports doesn't seem to work under squid proxy

I have used the following commands acl Safe_ports port 25 # smtp acl Safe_ports port 110 # pop3 But when i configured my mail account in my client's machine it doesn't seem to ...
0
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1answer
515 views

Port 8731 works internally, not externally. Win 7 + XAMPP

I have a web service which needs to run on port 8731. I'm running Windows 7 x64 with XAMPP. For privacy sake, let's assume my public facing IP, seen on whatismyip.com, is 123.456.78.90: ...
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2answers
4k views

Dual Monitors with DisplayPort and DVI-D

I have a Dell Optiplex 990 with an AMD Radeon HD 6670 graphics card. I would like to use my two Dell UltraSharp U2711 monitors in a dual configuration with my computer. Both monitors have a single ...
1
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1answer
280 views

Rerouting Ports for a Gameserver

I want to redirect a port, so say all traffic coming in on subdomain.xyz.com:2233 is rerouted to an ip 10.13.15.34:3344 (for example) I have access to an ubuntu box if needed, and access to xyz.com's ...
0
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1answer
53 views

Mac OS X report via e-mail when a connection is done to specific ports (open in Firewall)

I have ports open on a Mac for specific services. Is there a way to have the OS report through e-mail (Smtp) once a connection is established to one of the ports of interest?
3
votes
1answer
7k views

What is hosts2-ns

I just did a portscan on my parents router from the outside with nmap. (outside means I ssh'ed to my server and nmap'ed back to the routers external ip from that server) ~ $ sudo nmap -Pn ...
8
votes
1answer
14k views

Why does google chrome need so many ports open?

I just did a port check with CPorts and I find that google chrome has so many local ports open in the range of 7713 - 7794. They are all connects to 80 or 443 on the other end. Why does google ...
2
votes
1answer
1k views

Smokeping monitoring IP address and port

I have successfully install smokeping on my Ubuntu Karmic machine and am monitoring servers. I need to be able to monitor an IP address and a port, can someone tell me how I do that? I looked into ...
1
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1answer
540 views

How can I configure my SOHO Windows 7 machine to host a Minecraft Server that requires people to join the VPN prior to connecting?

Is that possible? Basically having some security issues with having the port open. Wondering if I can expose the Minecraft Server to a VPN only so that users will need to authenticate and join the VPN ...
2
votes
1answer
278 views

Named ports in Windows

I wonder how stuff like this works in windows (xp and other that have telnet): Start-> Run -> cmd -> telnet <xyz.com> http Start-> Run -> cmd -> telnet <xyz.com> pop3 ...
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2answers
581 views

No access to remote port 22

I can't use distants port 22 anymore. This problem appeared "magically" when I booted today and tried to push some files on a remote git repo. I run on Ubuntu 11.10. I tried connecting to other ...
10
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6answers
8k views

Why does my USB cable have an extra red plug?

My girlfriend just got a new ebook reader — a jetbook — that came with an unusual USB cable. One end is a regular USB mini B head, but the other end has two plugs. Both are USB non-mini ...
0
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2answers
11k views

How to identify internal ports and external ports that are mapped by NAT by the router?

For example, my HTTP port 80 is opened and mapped by the router to port 42300 facing outwards. Is there a way to identify , let's say my port 150 that is open for connection is mapped into what ...
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0answers
460 views

Can not open port 6000 windows xp

I am trying to connect to macincloud using their software and can not. They told me the reason is port 6000 is not open. I spent 3 hours on the phone today with ATT making sure the 6000 port was open ...
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5answers
7k views

How can I find out which process is listening on a port on linux? [duplicate]

Possible Duplicate: Finding the process that is using a certain port in Linux How can I find out which process is listening on a port on linux?
0
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1answer
1k views

Open port in Window 7 for local client-server development and debugging

I am writing a C# console application for Windows 7 that can send and listen to packets (client or server). Since I only have one computer, I will have to debug and test my code locally. I first ...
0
votes
1answer
210 views

How can I release the port back in Mac OS X?

I have an application which crash, but it holding the port that not allow I connect back, how can I release it back for other application to use back the port? Thanks.
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2answers
350 views

How do I reopen a port in Ubuntu?

My program bind a port for listening, after it terminates, the port is not available for about a moment and any attempt to open the same port again for listening will fail in that period of time. I ...
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1answer
566 views

COM Port of USB Mouse?

I plugged in a USB mouse into my Vista machine and it's working fine. Is this device assigned a COM port number? If so, how do I determine it? In Device Manager, under Ports, everything listed there ...
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1answer
724 views

How to install macports -devel port not listed in the search?

I'd like to install this https://trac.macports.org/ticket/30450 devel port, called "py27-wxpython-devel". However, when I do: sudo port install py27-wxpython-devel I get: Error: Port ...
0
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0answers
2k views

Port forwarding on D-link DIR-615 router

I'm attempting to configure my router to forward a port to my Linux machine. The Linux computer has a static IP (192.168.0.185) Right now I'm just experimenting to make sure I can forward a port, so ...
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2answers
419 views

Firewall blocking IRC client

I'm trying to use Irssi client to connect to irc.freenode.net in my office. What is happening is I think our corporate firewall is blocking IRC ports. Can anyone tell me how to get around this. I'm ...
0
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2answers
649 views

opening port on router for apache server

I'd like to access my Ubuntu headless box from outside world. I'm trying to do port forwarding and I think something is going wrong... I've d-link DSL-2640B Advanced -> Port Forwarding serverName: ...
2
votes
1answer
2k views

Is it possible to run a program to redirect all port 5938 access to port 59000?

We'd like some sort of program that redirects all reads/writes to port 5938, to port 59000. It has to work in both directions, kind of like a "port tunnel". Is this possible?
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1answer
1k views

How can I port forward in localhost

I want to forward the packets from a port to another port within the localhost How can I port forward from 127.0.0.1:3490 to 127.0.0.1:4490 ?
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3answers
234 views

The physical aspect of networking ports

I stumbled across this article which, unlike any ambiguous article I've read, states that my "pencil-thin network cable (or wireless network adapter) at the back of your computer contains 65,536 ...
4
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1answer
3k views

What is the purpose of ports?

I have a few questions in regard to the following explanation of ports I found. The Application layer talks to the Transport layer through a port. Ports are numbered and standard ...
2
votes
2answers
3k views

ISP Appears to Block Ports 80, 30080, 8080 etc etc

When using Canyouseeme.org it appears that my ISP is blocking every port. I am attempting to run a web server which works fine locally. I asked a previous question (here) regarding using different ...
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2answers
6k views

NAS Port forwarding

So I have a NAS. According to the website I should be opening port 80 (for the web interface), port 443 (HTTPS), 20 and 21 for FTP and some random range for torrent downloading (I kinda don't need it, ...
2
votes
1answer
2k views

WRT54G Port forwarding is not working

I have setup port forwarding successfully before, but this time it just won't work. I am using a WRT54G v6 Router, with the latest firmware. In the port forwarding section, I have set the port range ...
0
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2answers
2k views

Closing 139 and 445 ports to prevent from get hacked

I heard that you can close these two ports for surfing safe on the internet. By mean don't get hacked. Now I'm closed them but I'm not sure is it really true or not. BTW, I'm on win7. Thanks.
2
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2answers
2k views

Is my ISP blocking the ports 5050 and 6060

I want to find out whether or not my ISP is blocking the ports 5050 and 6060 which I need for my voip software on my iPhone. I'm using a 3G stick with a prepaid plan, and I'm using the internet ...
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votes
1answer
607 views

Open a linux port without using iptables in Centos? [closed]

just a quick question, is it possible to open a port on linux Centos without using iptables? If so, how do I do that from the command line?
0
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2answers
193 views

What exactly is using port 29178

I am trying to launch a program which is uses port 29178 but it won't start up because it says the port is already in use. Netstat gives me this C:\Rush>netstat -aon | findstr 29178 TCP ...
13
votes
1answer
21k views

802.1X: What EXACTLY is it regarding WPA and EAP?

I understand 802.1X to be some sort of port authentication control. However, when I was checking out the encryption settings for my wireless I found 802.1X in a drop down along with WPA2, WPA and WEP, ...
0
votes
1answer
716 views

8080 port in nginx not able to serve for certain wordpress website

I don't know if it's related to the domain records pointing rules. I configured for other website as well and they are fine. I used 8080 as the port for the websites. But for this particular site, ...
0
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1answer
75 views

How can I connect to a home automation web controller?

I've bought a remote web controller for home automation. I'd like to write a client software by myself, because the built in interface is ugly & not user friendly. Thus, I'd like to find the ...
0
votes
2answers
340 views

Why does installing GIMP over MacPorts download more than just GIMP?

I freshly installed Mac OS X Lion yesterday and today I wanted to try MacPorts and install GIMP with it, because the Gimp homepage says it's easy installed with MacPorts, so I tried the command sudo ...
0
votes
1answer
608 views

FTP Port opening

I've been trying to forward port 21 with no success. I have a CN router that has many options, but I have basically no idea what is what. I have already forwarded the 21 port, but when I check it ...
3
votes
1answer
92 views

Just bought a domain, setting up a couple server applications for the first time

I recently bought a domain, mainly for website experimentation, game servers and a ventrillo. I'm running all this from my home computer, and I am using freedns.afraid.org as my ddns nameserver. ...
0
votes
2answers
7k views

How do I change the default TCP listening port for VLC HTTP Remote Control from 8080?

I think most of the info is in the question but here's a little more detail on what I'm trying to achieve. I control VLC via my Android phone and the VLC Remote app. It works just fine, but I'd ...
0
votes
1answer
238 views

What is fjappmgrbulk?

I captured a udp packet from wireshark which ones port is 2510 and destination ip is 81.64.155.202. What is that port for? I found this post) mentioning: "it's for fjappmgrbulk, fjappmgrbulk ...
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3answers
715 views
2
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1answer
456 views

What is this port on my laptop?

Next to my headphone and microphone 3.5mm jacks there is one more 3.5mm port with a little image that looks like the image below. What is this port? What can it be used for?
0
votes
1answer
237 views

Starting a service which may have port conflicts with existing service

Is there any way to start a service and force a service that is already running to stop if it uses the port that the service I want to start is going to be using? I'm going to be installing apache ...
10
votes
1answer
59k views

Port 5357 TCP on Windows 7 professional 64 bit?

Is there a reason this port is open, a quick Nmap scan and Nessus scan reveal it's open, why? Are there any ramifications if I close this port via the firewall rule set? Or does anyone here now more ...