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 Can I Make Two (Or More) Usb Ports Act LIke One?

From what I understand, usb 3.0 storage devices have a higher data transfer rate (though it also depends on other factors), and that they're backwards-compatible with usb 2.0. However, when used in a ...
45
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11answers
134k 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 ...
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1answer
3k 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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4answers
2k views

Which Powershell Function could check whether a certain port is in LISTENING state on localhost?

Introduction Aim: to check whether a port is in LISTENING state on localhost by using a PowerShell function The following command: New-Object Net.Sockets.TcpClient.Connect("127.0.0.1",10389) ...
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1answer
12 views

DDoSing ports, do numbers matter?

I know people typically DDoS port 80, but let's say I DDoS any port besides 80, would surpassing the given port speed of any specified port still cripple someones network? Say I want to DDoS port 45, ...
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1answer
13 views

How do I change Synology DSM 5.0 http port via SSH?

I need to change port for HTTP from 5000 to 7777 on my Synology NAS via SSH. Is this possible?
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0answers
33 views

Why are all these email ports listening on a new Windows 8.1 install?

I recently did a fresh install of Windows on a formatted disk, upgrading from Windows 7 Pro to 8.1 Pro. Now I have installed a few things already, including: Embarcadero RAD Studio XE8 Microsoft ...
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2answers
9k views

Can't access my IP camera over the internet

I have an EasyN F3 (F3-M166) IP camera. It works fine on local IP address, but I can't access it over internet. This is what I have done step by step: I configured the local IP (camera_ip) and port ...
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0answers
19 views

Are there any wifi routers that allow manual setting to 100 full-duplex [closed]

I need a wifi router that I can manually set to 100 full duplex. Unfortunately our ISPs service only works correctly if the port can be manually set to 100 full duplex. In auto-negotiation it doesn't ...
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0answers
9 views

Stop a reverse ssh tunneled port from listening on remote machine

I have a few devices that may get serviced through a server. Since the devices connect through a GPRS network with inbound connections blocked I make them check with the server every few minutes. The ...
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0answers
14 views

HP Probook 4510s

Since morning I'm not able to use Internet in my laptop.I use a local company broadband LAN connection.Generally when connected two lights blink at the LAN port (green n orange) but now only the ...
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5answers
56k views

How do I find out what service is using a certain port?

Port 22 specifically. I installed freeSSHd on a Windows Server 2008 box that only runs IIS. When I try to start the SSH Service, it tells me that the port is already being used. How can I find out ...
59
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7answers
145k views

Test if a port on a remote system is reachable (without telnet)

In the old days, we used telnet to see if a port on a remote host was open: telnet hostname port would attempt to connect to any port on any host and give you access to the raw TCP stream. These ...
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4answers
14k views

Windows 7 is blocking ports

I am trying to open port 80 and 3690 for HTTP and svnserve respectively (inbound for both). I have Windows Firewall off, and have tried temporarily disabling Mcafee VirusScan Enterprise, to no avail. ...
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0answers
21 views

What port does the DOCSIS 3.0 update come through on a firewall?

The problem is my cable company tries to push updates to a cable modem that they don't own which causes home network problems. Is there a way to block their DOCSIS updates, but not the ones ...
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0answers
24 views

Tcp connection target machine actively refused

I have a simple TCP client/server program on two laptops. The server should work fine as I use "netstat -anb" and the server shows up as listening, "0.0.0.0:102", then my client connection failed, ...
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2answers
48 views

Forwarded port 4433 to my PC's IP

On my router ASUS RT-N18U is port 4433 forwared to my PC's IP address. I've not done this and I don't know what does is mean. Should I be worried? EDIT: And also ports 60868 and 46153
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1answer
20 views

How to invoke Privoxy?

I have installed Privoxy on Windows 7 64-bit and by searching through it's docs I have found that i need to enter some command line arguments to install the Privoxy service. Now, where and how do I ...
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1answer
4k views

How to open a port for all users: NSA 2400

I'm trying to open up port 8332 for all users behind my firewall but can only find instructions for doing so for a single IP address. How do I make sure all my users can use a specific port? I've ...
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2answers
29 views

Port forwarding error on new router

I've recently gotten a new router to handle a 1GB internet connection (yes, 1GB) because my old router shouldn't be able to handle such a massive connection. But with it came a whole new lay-out and ...
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0answers
14 views

port forwarding with micrmax modem mmx219w wi fi plug n play modem [duplicate]

help me to find out: i m using micromax auto plug n play wi fi modem with router functionality it can provide for 8 wi fi connections. model mmx219w wi fi router. problem is: when connected to usb ...
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1answer
576 views

How i open a port (port forward) on this specific router

Here is a pic of how my router looks like I cant find where port forwarding is in this one. I know how to open ports on my other routers. Model: Home Station Fibra òptica Amper EG-663 Amper
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1answer
30 views

Can't Change SSH Daemon's Port Number under CentOS 7

I've upgraded my VPS to CentOS 7 from CentOS 6. Back when I was running CentOS 6, simply changing the port number of the SSH daemon under /etc/ssh/sshd_config used to make my remote SSH connection ...
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2answers
69 views

What is the 'Real' Definition of a PORT? Where are they installed?

I am confused the concept of a PORT in Networking. But am not clear with where do they exist? My Queries... Where do they reside? Can I change them? How does the ISP blocks a Port(I ...
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0answers
18 views

create tunnel in order to access https via port 443

I have Windows machine that connected to Linux server 192.9.100.10 And Linux server has connectivity to the IBM blade center management GUI - 192.9.100.200 From my Windows machine I do not have ...
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0answers
6 views

Preserve port information on redirect response ngnix

I have a service say service1 behind nginx with following configuration upstream service1 {     sticky path=/service1 expires=31536000;     server ...
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3answers
3k views

iptables firewall only allows internet traffic if source port of 80 is allowed

I am configuring an iptables firewall, currently just to allow http and https traffic. It is working but under a particularly strange rule - I must allow incoming connections with a source port of ...
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0answers
15 views

How can I find why a port is used in Ubuntu Server? [duplicate]

I recently installed Kamailio 4.0.4 on Ubuntu Server 14.04. After first run. 0(5400) ERROR: <core> [tcp_main.c:2932]: tcp_init(): ERROR: tcp_init: bind(a, 0x7fb5b0783344, 16) on 127.0.0.1:5060 ...
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1answer
3k views

Firewall open ports for vSphere

I need to open ports on a firewall, so that a client could access his VM console through vCenter server's Web Client. I had a look at this page about port description, but I am a little confused. I ...
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0answers
27 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" ...
0
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2answers
34 views

2 Separate Machines, 2 Static IP Address. No connection Outside ISP Network

I have two separate physical machines. The first one is running CentOS 6.6 x86_64, and the second is running Ubuntu 14.04 LTS. (also 64-bit) Here's the issue. Both servers have a direct connection to ...
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0answers
22 views

USB Port not charging Galaxy S5 Tab

My Galaxy S5 Tablet will not charge through the USB port 2 0r 3 although it charges normally through the wall connection. How can I test the power output of a USB 3 port. My PC is a very high spec ...
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2answers
35 views

Allowing port access on Windows

I have a message broker running on my computer on port 1883. I tried to telnet that port (to test its accssibility) from a computer on the same network but that didn't work. How can I allow other ...
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2answers
29 views

Q: Is it possible to monitor SSH activity across local network (within organization)?

Is it possible to monitor SSH activity within the local network of the organization? Specifically is it possible to: View open SSH connections per user/machine along with the servers they are ...
2
votes
2answers
617 views

Can't use port 8080 - what is running on it? (OS X Mavericks)

I'm trying to run Tomcat on port 8080 using cargo, but it gives the message: org.codehaus.cargo.container.ContainerException: Port number 8080 (defined with the property cargo.servlet.port) is in ...
77
votes
2answers
156k 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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3answers
32 views

Port forwarding testing

In trying to check if I setup Port Forwarding correctly for my IP security camera none of the services report the port open. I can access the camera from within the LAN, but can't see it from the WAN. ...
2
votes
1answer
6k views

How can I map a domain name to an IP address and port?

I want to give a domain name to the IP address and port for an application in Windows 7. For example, test.com should map to 127.0.0.1:59873. Is there anyway that we can do it by using a web server ...
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0answers
174 views

Windows 7 ports Blocked even after disabled Firewall

    I am installing 3CX PBX on a Win 7 Pro Machine, in a SBS2011 domain. The problem I am facing is the Ports that 3CX uses are blocked. This Windows 7 , is VM in XenServer 6.2 ...
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0answers
38 views

How to make content of port 8080 available to port 80

I have a web page on port 80 to control a rover and I am running mjpg streamer on port 8080 to stream webcam output. I want to be able to see the stream on the web page of port 80. I have already set ...
0
votes
1answer
51 views

PF: Can't open port on OS X

Have troubles opening the port 9 on os x 10.10.3 yousemite using pf firewall. I want to do this for being able to get wake-on-lan packets to this port. I assume that for WoL to work the port (on the ...
0
votes
1answer
85 views

Set up wake-on-lan for mac os x via Actiontec T1200H Router: Ports 7 and 9 are closed

I've got two macs connected to home wireless network via Actiontec T1200H Router. Both macs support Wake on Wireless (in About this Mac-->System Report-->Network-->Wi-fi-->Wake On Wireless: ...
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4answers
5k views

Open port 5672/tcp for access to RabbitMQ on Mac

I have RabbitMQ in its latest version installed on my Mac with default configuration and when I'm accessing it from localhost there's no issue what so ever. But today I build a linux machine on local ...
0
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0answers
23 views

Set up wake-on-lan for mac os x via Actiontec T1200H Router: Ports 7 and 9 are closed

I've got two macs connected into home wireless network via Actiontec T1200H Router. Both machines have "Wake for network access" checked in System Preferences --> Energy Saver means that both support ...
4
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5answers
17k 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 ...
7
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3answers
104k views

Outgoing VPN PPTP: How to check if TCP port 1723 and GRE protocol port 47 are blocked or not in Windows 7?

I am trying to connect to a VPN Server (BestUKVPN) but I'm failing each time I try. I get a "691 error" but the username and password are OK. I searched and I am told that "port 1723" or 'GRE ...
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0answers
42 views

Client not connecting to port running openssl s_server

Question Context: I want to test a TLS handshake and see all the output (for learning/work related purposes) between my local computer (running OSX Yosemite) and a remote work server (running amazon ...
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0answers
62 views

Forwarding port through 2 routers mikrotik and tplink

I have 2 routers in my network: Internal lan 192.168.0.x is behind a router tplink TL-T480T TPlink Lan is 192.168.0.2 TPlink wan is 192.168.88.252 TPLINK is behind a router Mikrotik 750, Mikrotik ...
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0answers
47 views

Which port do I need to open?

Currently we have a bit of a dodgy setup with our firewall, and are using an ngrok program to effectively punch a hole in out firewall to allow a program through (jvue). Unfortunately, this is the ...
9
votes
1answer
805 views

268 Ports Associated with Chrome

I'm currently using a Windows box, running Chrome 27 on the dev channel, and I have what I believe to be an unusually large number of listening connections connected with the process. The following ...