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
89 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 ...
0
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0answers
28 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 ...
0
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0answers
97 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 ...
0
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1answer
77 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 ...
1
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0answers
720 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
207 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). ...
0
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1answer
71 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
251 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
73 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 ...
0
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3answers
10k 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
9k 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
101 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
39 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
211 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
450 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 ...
4
votes
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
314 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
57 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 ...
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0answers
202 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
144 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
4k 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
7k 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
94 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
756 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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3answers
31 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 ...
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1answer
131 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 ...
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1answer
501 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 ...
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0answers
86 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
751 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. ...
0
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1answer
350 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
100 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
10k 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.
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2answers
45 views

Different server based on port number

I currently have a VPS setup with a Minecraft server on it running on port 25565. I also want to have a blog for my server using Tumblr which means that'll need port 80. The problem I find is I can't ...
0
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1answer
37 views

Mirroring web server in different port

I have a local web server which is accessible from the Internet through port 3333. I used port forwarding to achieve this. And now I am planning to develop a solution (possible network configuration ...
1
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1answer
94 views

The Risk of Port Forwarding to a VOIP Device

My VOIP provider uses a device to supply the service. The device is on my side of my router and part of my LAN. He requires I forward a very large range of ports to his device (something like 5000 ...
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0answers
147 views

How to force download on a specific lan port on Synology?

I have a synology DS409+ which is connected to internet via lan port 1 and Wifi key. Those are from different networks. I would like to force Download Station to download files through wifi and not ...
1
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2answers
390 views

Source port 443?

I'm might embarrass myself with this question, because of something really obvious, but I'm puzzled. My home broadband firewall log says it has been blocking incoming TCP traffic with a source (!) ...
1
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3answers
165 views

Quick way to scan for opened ports on local network according to a list

How can I quickly find out whether port 80 is open/listening on a server via a bash script? Normally on all workstations the daemon is running, but sometimes it fails. I use the following command to ...
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0answers
62 views

Port forwarding : open port without any response

I've been playing around with my router recently to be able to access my localhost (ran by xampp) from outside. I've managed to open ports 80 and 443 and I've confirmed it with ...
0
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1answer
51 views

is it possible to link different email accounts to different network profiles?

My work firewall for wired internet blocks almost every port except http, https and maybe a few other web-related ports (993, 465 and everything else to do with IMAP is blocked). Impenetrable for, ...
0
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4answers
2k views

Warning: remote port forwarding failed for listen port 'xxxx'

How do I find the process that is listening on port 'xxxx' and kill it? I have RemoteForward 2022 remote.host:22 in my .ssh/config file. Whenever I ssh into a remote server: ssh staging-environment ...
8
votes
3answers
16k views

Find out what program runs in the java.exe process

I have a problem: always when my computer starts, there is a java.exe process listening in the port 7676. I want to find out what it is to be able to delete it. Is there any way that I can find that ...
0
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1answer
256 views

FTP client sends a wrong PORT command

I have a Windows 7 machine connected to 2 subnets, with IP addresses 10.0.0.241 and 172.17.240.94. On this machine runs a 3rd party java application that internally launches an FTP client session, ...
3
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1answer
3k views

Difference between port mapped and memory mapped access?

Can anyone explain what's the difference between port mapping and memory mapping, and what having both accomplishes? Why is there port mapped, how does it differ in structure from memory maps, and is ...
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0answers
63 views

Program to remove virtual COM ports

I have a program written in python that does a lot of bluetooth connections with multiple devices. I've had an issue that after a number of device connections, I can no longer connect to a bluetooth ...
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1answer
539 views

Jenkins listens on weird ports

I use Centos 6.5 and Jenkins 1.547. I installed Jenkins as outlined in Jenkins's wiki. I configured Jenkins to listen on local port 8081. netstat -tulpn reveals that Jenkins additionally listens ...
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0answers
101 views

Send traffic over specified connections by port

I am currently at a college with an extremely restrictive network. No outbound ports are open except 53, 80, and 443. I can't do any of the things I'd like to do like FTP, SSH, etc., which is ...
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246 views

How to check Server's(zimbra) open pop3 which is not porvided?

I am student of DA-IICT, Here we have Zimbra mail Server They haven't provided POP3 port to us, there is one port for pop3 is open that all of my professor uses. I have checked Zimbra's setting ...