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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Opening a specific port on Mac

I need to open a specific port on my mac client (because when I try to connect from server it says "target machine actively refused it ").My problem though is I cannot find a way to add a specific ...
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310 views

Is it possible to bind multiple, simulated devices to SNMP port 161?

I am attempting to simulate multiple SNMP agents on my computer. I am using this software to try and accomplish this. From the program's description: Verax SNMP agent simulator is a tool that can ...
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2answers
271 views

How to 'safely' download mail from hotel / airport free wifi? [closed]

I've a mail client setted with IMAP that try to download using 993 or 143 port. In a lot of hotel i can't download my mail . My question is: generally, do free wifi allow using 993 or 143 port ? How ...
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1answer
2k views

Using tor behind a proxy when just port 80 is open

I'm wondering if anybody could help me to connect to tor behind a proxy when just port 80 is open. thanks
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5answers
5k views

Why do I see router and not my real IIS?

I am trying to access IIS through web but unable to do so. Basically I have a router (which functions as router and modem) that is given by ISP and I have another router connected to the router given ...
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0answers
2k views

Why do I see router and not my real IIS? [duplicate]

I am trying to access IIS through web but unable to do so. Basically I have a router (which functions as router and modem) that is given by ISP and I have another router connected to the router given ...
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1answer
895 views

Disconnect a Program from its Socket or Port in Windows 7

I am working on a hack for internal purposes whereby I want to disconnect a program from it's socket without killing the process. For example, program A (running xxx.exe) is running on port 50000 and ...
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1answer
55 views

Make a program use other ports

My school network is behind a very strict firewall, and I can't connect my e-mail and other programs. Are there any ways to avoid this problem?
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2answers
1k views

Run JBoss on all interfaces (was: “Open port 8080 on Ubuntu”)

I'm running the JBoss webserver on my ubuntu (10.10 64bit) machine and I'd like to access it from another machine. If I open localhost:8080 in the browser on my local machine it works. However, from ...
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1answer
3k views

JBoss/Torquebox - How to set to listen to port 80

I am now trying to deploy my Rails application to Torquebox 2.0.3 on Ubuntu Server 11.04. Now it's correctly deployed , I could visit the application on port 8080. but I could not configure the server ...
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Intel Rapid Storage Technology (IRST): puzzled over port number assignements

I am using the tool Intel Rapid Storage Technology (IRST) v9.6.61001 to display the current status of several disks that are built-in and/or connected to a Lenovo W701 Model 4323. The status window ...
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1answer
2k views

Forwarding <my ip>:<port> to localhost:80/dir/ (apache)

Hello again StackExchange! First post on Superuser. I've installed apache and PHP on my computer and it works just fine when i enter "localhost" on my computer. But what i want, is when someone types ...
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1answer
3k views

Port COM Setting & Configuration

I have a Lenovo Thinkpad T61 laptop. I had to wipe my hard drive clean and re-loaded window xp. Under "My device manager" I can see Ports (COM & LPT), under this the printer LPT3 port is fine, ...
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1answer
93 views

FlashFXP asking to connect to unknown remote address

I installed Agnitum Outpost firewall which tells me about every connection happening on every port. When I try to connect to my FTP server on port 21 (hosted on mediatemple.com), I get an outgoing ...
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1answer
939 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 ...
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1answer
425 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 ...
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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
647 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 ...
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1answer
520 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 ...
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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 ...
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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?
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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 ...
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1answer
15k 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 ...
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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 ...
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1answer
541 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 ...
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1answer
282 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
589 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 ...
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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 ...
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2answers
12k 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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465 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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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?
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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 ...
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1answer
212 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
351 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
567 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
726 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 ...
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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 ...
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2answers
655 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: ...
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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
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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 ...
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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 ...
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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, ...
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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 ...
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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.
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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 ...