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 see which process is using which port in windows 8

I am trying to start the Tomcat server at my pc by eclipse. But it is showing the following message Several ports (8005, 8080, 8009) required by Tomcat v8.0 Server at localhost are already in use. ...
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1answer
31 views

What are the default nmap options?

Which options are used by default, when the user fires # nmap target without any explicit option? I am going to write the defaults of the three options I consider the most important. It would be ...
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1answer
29 views

port visible but not accessable

I have port 80 open through my router, I have disabled my firewall, and canyouseeme.org sees port 80. yet I can not navigate to my IP address which is my web server. How can my port be visible yet I ...
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2answers
61 views

IPTables - Redirect traffic based on country

Is there any way how to allow TCP traffic only from specified countries on a specified port and the rest of traffic redirect to another IP/port using iptables ?
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1answer
27 views

PID 4 Using Port 80 - IIS Unable To Bind

So I've been having a problem where I can't use localhost:80 on IIS So I ran this: > netstat -ano | find "0:80" And got: TCP 0.0.0.0:80 0.0.0.0:0 LISTENING 4 ...
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1answer
358 views

What service uses UDP port 242?

What service uses UDP port 242? According to nmap, it says that the service or protocol named "direct" uses the port, but Google search does not seem to bring me an answer.
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0answers
15 views

Commonly open ports in restricted wifi networks

Which ports except for 80 and 443 are commonly not blocked in open wifi networks? I want to set up a OpenVPN Server on such a port to get around restricted networks. I have experienced the issue that ...
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2answers
32k 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
44 views

Can ONLY connect to ports http:80 and https:443?

I have a problem where I can only connect to the standard http port 80 and https port 443. I can access websites perfectly and play videos and all, but when I try to connect to IP's using other ports, ...
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1answer
35 views

Port not open but still able to download : how does it work?

When using p2p softwares such as a torrent client or emule I am unable to open ports even if I allow them in my firewall and forward them in the NAT configuration. Even after doing those two things ...
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0answers
22 views

given an on-borad port PCI address, how do I know to which NIC it belongs?

Assume we have a server with 2 on-board NICs (no other NIC was inserted to any of the free expansion slots). Given a PCI address of any of the ports of the on-board NICs above, is there a way to know ...
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1answer
4k views

Cannot open port 8080

I'm running a VmWare with an application under JBoss starting up on port 8080. I'm able to access the app from outside the VM if the iptables are off. However, I must turn on iptables due to some ...
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0answers
66 views

What kind of ports are on this PCB? (Kangaroo Pocket PC)

| Overview Please refer to the teardown of the Kangaroo mini PC (below.) I am interested in finding out as much as I can about this board and the ports associated with it. Any details/specifications ...
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2answers
222 views

unknown open ports/services 54409 and 16808

I have a Linksys EA6400 router. Today, I have noticed in the log file some activity from multiple ip addresses on 2 ports that are open: 54409 and 16808 and I do not know what is going on there. I ...
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3answers
2k views

Configure http port to 80 from 8080

Wildfly use port 8080 by default. How to change this to 80? So that I don't have to always add colon 8080? <socket-binding-group name="standard-sockets" default-interface="public" port-offset="${...
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4answers
55 views

Multiple tabs of a browser

Since unique port numbers are assigned to each of the different processes related to network which are going on a system.So,my question is that,if multiple tabs are open in a browser then will ...
0
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1answer
117 views

Connection Refused on Host OSX 127.0.0.1:3000 for Vagrant/VirtualBox/nginx Rails App

The Rails application is running on port 3000: $ bundle exec rails server -b 0.0.0.0 => Booting Unicorn => Rails 3.2.21 application starting in development on http://0.0.0.0:3000 => Call ...
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0answers
22 views

How to monitor a port bandwidth?

How can I monitor a specific port's bandwidth? I'm using squid cache server, and I want to find out how much bandwidth is preserved. using soft wares like DU METER it's not possible to measure that. ...
0
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1answer
51 views

What is this port on my 1999 laptop? [duplicate]

My Maxdata Artist Harvard SL Pro laptop, dating from 1999, has this port on its back side. I have never seen this anywhere else, neither can I identify the little icon to its side. The size of the ...
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2answers
753 views

How can I remap outgoing TCP ports?

Is there any way to remap a TCP port from a program were you not can change the port number? The program talks on port 4321 and I want it to go out on port 14321 on the local computer.
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0answers
69 views

Connecting a 2-pair Ethernet Cable to my Home Network

I have a IP video doorbell that connects using a 2-pair telephone line. I have managed to connect it to my DSL router (Linksys WAG320N) successfully and connection is working fine with live streaming ...
1
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3answers
76 views

My web server and web browser appear to be using port 80 at the same time

If I, on OS X, Start Firefox. Start Google Chrome. Start a Ruby on Rails server on port 80 (using RVM) rvmsudo rails -p 80 Use lsof to look at what is running on port 80 sudo lsof -i:80 Then I ...
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1answer
27 views

Using firewall-cmd to open up a port for INPUT only

I'm using firewall-cmd on centos7 to open up a port. But, I want to open up the port for INPUT only. I currently have this, but it, presumbably, opens it for INPUT and OUTPUT. sudo firewall-cmd --...
124
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1answer
224k views

What is port forwarding and what is it used for?

There are a lot of questions on 'port forwarding' but there doesn't seem to be one that clearly states what it is and what it's used for. So: What is Port Forwarding? What is it used for, and why ...
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2answers
30 views

Things That Affect NIC Cards' Performance?

Folks, I have a laptop and a tower. And I use EtherCAT (through Ethernet port) on both. But I notice that if I unplug my cables on the tower, I loose a lot of frames, where as in the laptop I may not ...
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4answers
6k views

How to remove IIS for WampSERVER?

I have WampServer installed, and I installed Microsoft SEO Toolkit, I guess that has the IIS dependency. And I guess the iis service uses port 80. Now every time I start WampServer, I need to go to ...
0
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1answer
35 views

Port forwarding service conflict with an existing port forwarding rule offering Any service

I am trying to add a port forwarding rule to my router that will allow a webcam and a 3d print server to run so that I can have remote administration. I am getting the following error service ...
0
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1answer
29 views

Cannot set ports to listening even though they have been opened Windows/Ubuntu

Currently trying to set up a connection (using sockets) between my localPC (windows) and my VM (Ubuntu). They are both on the same subnet and can be pinged. Went into Windows features, advanced ...
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1answer
33 views

How to safely open ports on home networks for testing purposes

I am trying to simulate a client/server scenario on my home network. To setup the socket connections, i require unused ports. For safety reasons these ports are closed. What criteria should be ...
0
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0answers
33 views

Port forwarding in windows to device

Hi I'm trying to access remotely to the server of a device connected to Windows by Ethernet by port:80. I have already port forwarded that port to the PC and set the Firewall to allow access thru that ...
0
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0answers
30 views

Create a printer USB port in Windows without a printer installer

I have an HP Laserjet 1020. I plug it into a Windows 7 Pro 32 bit Dell via USB. Under Devices and Printers, it shows up as a fully recognized USB device however it does not show up as a printer. I go ...
0
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1answer
13 views

Allow http request over specific port in iptables

I'm running Kodi with a web service for the remote control. The web server is listening to port 11734, however opening that port (UDP and TCP) doesn't seem to work. Once I accept all incoming traffic ...
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1answer
32 views

Port forwarding is messed up

recently changed Hikvision Cube IP camera's (DS-2CD2412F) port and then after it does not work. I also changed the port forwarding in the router. It works only for 1 to 2 hrs, then it cannot be ...
4
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2answers
6k views

What is the difference between Port and Connector?

I want to know the difference between Port and Connector in Computer (the physical ones),and how can i tell that this thing is a port or connector ? I know that both terms are used for the same ...
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0answers
19 views

TrendNet TEG-S16D port to Unifi AP freezes causing connectivity loss

I needed more ports so I upgraded from a TEG-S80DG to a TEG-S16D (unmanaged switch btw) and started encountering this problem. The port which is connected to a Unifi AP is "freezing" causing all ...
0
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2answers
61 views

How can I identify the command that spawned a process listening on a certain port?

I’m using the following version of Linux [davea@mydevbox ~]$ uname -a Linux mydevbox.mydomain.com 5.7.8-35.36.amzn1.x86_64 #1 SMP Wed Mar 16 17:15:34 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux I want ...
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2answers
4k views

Testing a Firewall against outgoing UDP ports

I'm trying to test which outgoing ports are allowed through a firewall. At the moment I can do this for TCP by port scanning portquiz.net (which is a server with all TCP ports open) from inside ...
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2answers
108 views

Can't telnet to a Linux port

There is the following listener: telnet -na | grep 8000 tcp 0 0.0.0.0:8000 0.0.0.0:* LISTEN I can do telnet 1.2.3.4 8000 from the 1.2.3.4 server and it connects, but same command from ...
0
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1answer
51 views

Use two services/protocols on port 80

i ran into a problem today. I'am running a home webserver with FTP and everything and want also be able to connect to XBox live. The problem is (maybe some of you know) that Live uses port 80 (which ...
0
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0answers
213 views

Remote Login to Asus RT-AC87U Router

When I try to "remotely" login to my ASUS RT-AC87U Router, I'm getting below message and I'm not sure what to do? External IP: 17x.xxx.xxx.xxx Internal IP: 192.168.1.xx to login I use: 17x.xxx.xxx....
3
votes
1answer
132 views

Can't start IIS website on port 443, even though netstat shows nothing listening on 443

I have to bind my IIS website to port 443. No other port is allowed in my case. In IIS Manager I've bound Default Web Site to port 443: But when I try to start the website it fails with: However ...
63
votes
13answers
200k views

Manually closing a port from commandline

I want to close an open port which is in listening mode between my client and server application. Is there any manual command line option in Linux to close a port ?? NOTE: I came to know that "only ...
0
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0answers
19 views

How to change transmission-daemon port?

In /etc/transmission-daemon/settings.json I changed "rpc-port": 9091 to "rpc-port": 69, but since then I've been getting ERR_CONNECTION_REFUSED when I try to open website:69. Earlier, I was able to ...
0
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1answer
28 views

Trying to find out what's wrong with our external hard drive?

We have had the external hard drive since 2010 and we've had ongoing issues with it for the past 2 years. I'm hoping I can find out exactly what's wrong with it. Details: BUFFALO 500GB Hard Drive ...
1
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0answers
37 views

Mikrotik RouterOS FTP protocol routing

I have Routerboard 951Ui-2HnD and I am using it to merge/combine two internet lines wan1 and wan2 and it's working fine but I am facing a problem when I am trying to connect to any FTP server or ...
0
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0answers
97 views

How do I get my nginx server on the internet?

I have a personal website and it's very small, therefor I don't want to pay for it be hosted online. After a few days of research I decided to install vmware with linux ubuntu-server 14.04 with an ...
0
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1answer
41 views

Can two different applications bind the same port on a host if they use different protocols?

my question is quite clear I think. If two applications use different transport layer protocols (e.g. TCP and UDP or something else) can they open the same port number? How does the OS do the ...
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3answers
66 views

What exactly is a network socket? [closed]

I've heard a lot of different definitions online, and having trouble understanding what a socket is. It'd be great if someone could shine a light where it's all dark for me.
43
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4answers
6k views

Do web browsers use different outgoing ports for different tabs?

In a web browser that supports having multiple tabs, such as Firefox, do different tabs that go to different website domains use a dedicated port for each domain?. Or does the browser use a single ...
1
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1answer
67 views

Port forward Apache behind router and modem

I have a D-Link DSL-321B modem and an Asus RN-N12E_B1 router. The modem is connected directly with the internet. The router is the only device directly connected to the modem. My computer is ...