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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How to find which port a service is using by “grep” the result of netstat output on windows 7?

i want to find which port a service is using. i know i can use netstat -anb to show all the protocols and all applications. but how can i filter the result, eg. if the program i'm trying to ...
3
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3answers
2k views

net use and Windows 8.1

I have a script that in run by some application. The script adds a shared printer to lpt1 port, then sends a file to it so it get printed then removes the printer from the port: Everything works fine ...
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1answer
146 views

How to find what's listening on specific port in Win7?

I'd like to find out what's blocking port 80 on my system. I've found the answer here but... as the result I get "couldn't not determine owner" (or something like that - I use Polish version so exact ...
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1answer
23 views

Port forwarding with two routers?

Can someone walk me through port forwarding with two routers, I will post screenshots as needed. I've tried many tutorials online and I can't seem to get it to work.
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2answers
361 views

Netgear WNDR4500 listening on port 80

I have a Netgear WNDR4500 that I use for my home router. I also have my own domain with a subdomain point to my IP. I happened to browse to it today and noticed the management console was listening ...
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0answers
9 views

How do I setup my web browser to default to alternate port for web development

I would like to setup a development copy of my site on another port in order to develop it in exactly the same conditions. Is there a way to setup my browser or is there a browser capable of ...
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4answers
138 views

How do I forward a port accessible to the world on my Mac?

I realize that there's a lot of info out there about port forwarding, but here's my specific situation. I need to use Remote in (via VNC) to my Mac. By default, the Mac Remote Sharing server listens ...
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3answers
2k views

Source Address / Source Port vs Destination Address / Destination Port

I am new to TCP/IP and trying hard to learn basics. Well, I really wonder about inbound rules and outbound rules of Firewall and concept of source adress:port, destination adress:port. For example I ...
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2answers
102k views

What are CLOSE_WAIT and TIME_WAIT states?

When I do netstat -a on my Windows machine, I get a listing of the ports with one of the four states: LISTENING CLOSE_WAIT TIME_WAIT ESTABLISHED What do CLOSE_WAIT and TIME_WAIT mean/indicate?
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0answers
142 views

Windows 8.1 Remote desktop (Android app) Connection error

I am trying to set up remote access from my Android tablet to my notebook with Windows 8.1. I have d-link router DIR-600. I am getting Connection error when trying to log on. My Android tablet is ...
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0answers
44 views

Hiding port number from address.

I have centos 6.5 running some web apps. Currently due the following port forwarding rules, I am only able to access my public content using 127.0.0.1:8080/ Is there anyone to just use 127.0.0.1 ...
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40 views

Problems with opening ports and running listen servers in Red Orchestra (Router keeps restarting)

I'm no stranger to having to open ports, doing it a couple of times on a couple of different routers, and have done it on this router a few times. I'd opened up ports to play Terraria through TShock, ...
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1answer
223 views

Windows Firewall inbound rules still blocks ports

I applied inbound rules for port: 1935, as well as outbound. When I check on canyouseeme.org, it says it (port 1935) times out. When I completely turn off Windows 7's firewall, it works without a ...
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0answers
1k views

Opening port 8080 on Windows firewall

I am not sure if I am just missing a trick here and it will be something rather simple, or if I am trying to do something that just isn't going to work.. Anyway, I have an asp.net site and I am using ...
10
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2answers
6k views

Netgear router listening on port 32764?

I've got a Netgear DG834G running firmware V5.01.01. From the LAN side, if I port scan it, it's listening on tcp port 32764. Trying to telnet into this port gives me the response ...
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1answer
36 views

Blocked port - no process

Working on a Linux Debian machine. When trying to start Tomcat7 a warning about port 80 being block is thrown. Furthermore, the deployed webapps cannot be accessed (404 error). Tried to figure out ...
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1answer
82 views

Is there any reason to use serial port over parrallel port

Serial Port : Serial communication takes place asynchronously, meaning that no synchronization signal (or clock) is required: the data may be sent at random intervals. In return, the peripheral must ...
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0answers
27 views

Mozilla opens port on my external IP

Sorry for probably a stupid question, but I didn't a find an answer anywehere else or I didn't look right. I wanted to know why mozilla firefox opens a port on my external IP. When I was looking ...
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0answers
86 views

Display port numbers and port names

How do I display both port numbers and port names at the same time? I can display the forward port numbers (i.e. 22, 25, 1000, 443, 80) using the following: [root@michaels ~]# iptables -L -n Chain ...
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1answer
55 views

How to forward a port to a DHCP client?

The following approach works for me. Say my local ip address is 192.168.1.136, I am able to open the port 63102 using the method illustrated in the following image. My issue is, if I configure my ...
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0answers
711 views

How can I open port 3690 (svn) to my network?

I've set up subversion about a year ago and have been using it with no problem, checking in files almost every day and updating them on another system on my network. For no apparent reason, it ...
0
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1answer
186 views

Should a port scan from the WAN side return any open port on a new router (TP-Link ER6020)?

I purchased a new router (TP-Link ER6020), turned it on and connected my computer to it. The router is running in NAT mode, I did not change a setting (despite providing dsl authentication details). ...
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1answer
58 views

How can I check for externally-open ports on a given server?

I need to programatically determine whether a given port on the server that my script is running on is open from the outside world. I'm working under the assumption that the only reliable way to ...
2
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2answers
5k views

Trying to run Apache, but VMWare Workstation is blocking port 80

When I run Apache server it shows port 80 is busy because WMware Workstation is blocking it. How can I run Apache?
0
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1answer
183 views

Mystery port on my Samsung laptop (NP700Z5C)

What is the port in the picture of my Samsung Series 7 NP700Z5C? It's called a "Display Port" in this image (not from Samsung, admittedly), but it's clearly not (the Samsung documentation even ...
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0answers
65 views

What ephemeral ports do Steam & Valve games use?

I need to know exactly which ports are ephemeral so that I can create QoS rules. This page doesn't state which are ephemeral. I know that some of those ports such as 28960 are static ephemeral ports. ...
5
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1answer
7k views

What is blocking my ports?

How do I find out what is blocking my ports? I am on Windows 7 x64 and trying to run Minecraft on port 25565, which worked yesterday, but not today. I have not installed any new software. I have ...
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3answers
6k views

How to bypass port blocking for p2p network? [closed]

I noticed that my school is now blocking all the ports to prevent p2p network such as torrent downloading. Of course it is against school's policy to bypass it. However I am curious if there is method ...
6
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1answer
8k views

Are there good alternative HTTP ports rather than port 80?

I have been looking for some documentation on alternatives to port forwarding to port 80. I have a dedicated Linux machine on a home router, and apparently utilizing port 80 is not an option. Are ...
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1answer
91 views

Use Router (External) IP Address for Dadicated Server [closed]

Currently i am in India. i have Broad Band Connection. I have TP-link router and i want to use router's external ip address for my dedicated server. Is it possible.? I am java developer not much on ...
1
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1answer
33 views

Disabling port 80 on Windows Vista

I need my Glassfish application server to use port 80 but it complains that it is already being used. I disabled IIS but port 80 was still in use. When I run some netstats, it shows that port 80 is ...
0
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0answers
207 views

Routing home server through VPN to bypass blocked ports

I am currently running Windows Server 2012 R2 in a virtual machine on an iMac. The server is serving a site using IIS as of now and I would also like to host an email server with it. Now, the problem ...
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0answers
422 views

What is blocking incoming packets to port 67?

I have a DSP connected to a Windows 7 laptop by Ethernet. The laptop has all firewalls disabled (I’ve even tried stopping the Windows firewall service and DHCP). The DSP is sending well-formed BOOTP ...
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3answers
1k views

How to force a process transmit over UDP instead of TCP?

I 'm running an ffserver process on a Linux machine, in order to achieve video streaming via ffmpeg. However, there is a delay on video streaming. On ffserver configuration file I define Port 8090. ...
0
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2answers
253 views

Ran “network restart”, netstat shows no open ports, server still says port is in use

I am doing some web development in django (python). The program runs it's own development server on port 8000. I turned off the server and now need to restart it, but I'm getting an "Error: That port ...
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1answer
51 views

Linux distribution detection with Nmap

When I run Nmap with OS detection it delivers the kernel version of the Linux host instead of the name of the Distribution. Nessus does Os detection based on banners ...
0
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0answers
183 views

Observing Output Current/Voltage from USB Port

I am working on a project where i am required to observe the current draw from a circuit. In a lab, I have access to power supply/multimeter and can easily check how much current is being drawn from ...
1
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1answer
109 views

Reset a single USB port

I have some USB devices, that sometimes need to be physically removed and plugged back in. They are mostly USB mobile broadband devices. For some cases I only have to unplug the device and put it back ...
1
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1answer
3k views

Port forwarding with PROLiNK H5004N ADSL

I am trying to setup a virtual host. So far it's working on LAN but when I try to access it on another network, it's pointing me to my router's interface. I have PROLiNK H5004N ADSL2+ Wireless ...
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4answers
5k views

Should I run my small website in port 80, 8080, or 81?

I am running a small website using nginx. Since there's (probably) not going to be a lot of traffic in my server's lifespan and to avoid random DoS attacks, I am considering setting the web server to ...
0
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1answer
83 views

Killing daemon and closing port without ability to use 'lsof'

I have an application that spits out the time when it is requested from a client. I don't have permissions to use port 13, so I put it on a really high-numbered port. Now I can't kill that port, and I ...
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2answers
649 views

Communicating with the LPT port through USB adapter

I have a proprietary hardware which accepts input on the parallel port. The problem is the PC which needs to communicate with the hardware doesn't have a parallel port and I can't change it's ...
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votes
3answers
30 views

Is it possible to take away tcp port which is already listened by another program

Is it possible that some program B can take away port which is already in use (listened) by program A. Should the program A (server whitch is listening some port) actually check the port status after ...
0
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1answer
111 views

Open ports 8456, 8832, and 54321 on my wifi router

Ran a port scan against my WiFi router (Trendnet TEW-633GR), found this: PORT STATE SERVICE 80/tcp open http 8456/tcp open unknown 8832/tcp open unknown 54321/tcp open unknown Port 80 ...
1
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1answer
402 views

Cannot access Mongodb from internet

I am using Mongodb database ,which is installed with the ip address 126.22.252.25. The Ubuntu version info is 12.04.3 LTS. My Mongodb uses the default 27017 port. On this local machine I can use ...
0
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0answers
76 views

Pow server - my site need port number for .dev

there, I am new to Ruby and trying to use Pow in my Mac. When I type MYSITE.dev/ in my browser, it always says "The connection was reset". But it works fine for MYSITE.dev:20559. It seems that I ...
0
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1answer
637 views

HP USB P2015 printers create new virtual USB ports in Windows; seemingly at random

We have the following scenario: 30 laptops 30 HP Laserjet P2015 printers all coupled via USB The users can sit at a different place, a different printer (though the identical model) every day. ...
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1answer
255 views

Opening port 3000 EC2 Amazon web services

I am trying to use nodejs and socket.io to deliver a webapp, which use websocket on port 3000. I have opened port 3000 on my EC2 instance in my management console by adding the inbound TCP rule to ...
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1answer
88 views

How can I make a domain point to a certain port without doing www.example.com:7000

I have a domain, and I would like to point play.thedomain.com to the ip:port, so I want my play.something.com to point to, let's say 127.0.0.1:25577 (I know, that's localhost, just an example) I do ...
5
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2answers
6k views

How to find out what is running on localhost port

I have something running at port 9090 on my local machine. It's probably something I set up long ago and forgot about... how can I find out what it is? I am using Windows 8.