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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25 views

Cannot curl webserver from outside network

I have a webserver running on one of my home computers. I am able to access it within my network, on another computer, with curl localWebserverIP:8888. However, I am having issues accessing it from ...
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1answer
14 views

Monitor switch traffic load on specific port (CISCO managed switch)

For troubleshooting networks problems I need to know how to monitor the traffic (work load) on a managed switch. I read about SPAN for CISCO switches. But it seems to be overkill since it does mirror ...
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0answers
12 views

Streaming same video on four different ports with same IP

I want to stream a video on four different ports on a same interface and also needs to receive in the same way. I think receiving is OK as i can have socket but how to stream the video in that way in ...
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3answers
5k views

How to block all ports except 80,443 with iptables? [duplicate]

Blocking all ports(in and out) is easy but it's hard with the word "except". I don't know any rules that satisfies the condition. PS: I know this question is nothing new. But in fact, I didn't find ...
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1answer
33 views

How could I test a port forward attempt was successful

I have set a random port number to a private IP address that's connected to my network. This device that exists at that private ip on the network is running linux. I setup this port foward from a ...
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0answers
10 views

port forwarding in ZTE F620

it have been for 3 days to make a port forwarding in my ZTE router and still there is no product. I want to open 80 port for one of my computer (which local adress is 192.168.1.11). ill give you ...
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4answers
11k 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
20 views

Invalid HTTP response received from host on port 443

I am facing issue with my nagios monitor installed in centos 6 server saying HTTP CRITICAL - Invalid HTTP response received from host on port 443:. i have opened the port but still giving the same ...
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2answers
7k views

Block all ports except SSH/HTTP in ipchains and iptables

How can I block all ports except ssh (port 22) httpd (port 80) using iptables and iphains?
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0answers
21 views

How to prevent Dropbox from blocking port 80?

I need port 80 for Apache and Dropbox uses the same port. Of course I could disable/uninstall Dropbox, but I would prefer to redirect it to some other port. Is it possible? I searched for "dropbox ...
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1answer
5k 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
10 views

ntoskrnl.exe NT Kernel & System on port 80 blocking Apache server 2.4 on Windows 8.1

Windows 8.1 Apache 2.4 Both Apache and IIS servers had been working with no problems. I tried to start Apache for MySql and had a 'Request operation has failed' message. Tried to do a manual start ...
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0answers
16 views

Cannot open port 25565 and others

I try to open my Minecraft server and my gmod server ports. Now I only try Minecraft and I tried to open in 192.168.1.1 in Windows firewall. I went to this site: ...
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vote
1answer
5k views

How to use LAN1 port as second WAN port? (dir-615)

I have STB, internet connection with PPPoE and router D-link DIR-615 with dd-wrt. I want to STB ip will be assign from ISP directly. Or set up iptv something different. P.S. Router is D-link DIR-615 ...
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0answers
20 views

Nodejs remote debugging ports closed

I have a problem with nodejs remote debugging. I'm using centos on remote server and phpstorm on my PC. When I open putty I type the command: node --debug-brk=5858 main_server.js, and get the ...
1
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1answer
114 views

Multiple SSH ports for Synology Diskstation DSM 5.1

I have a Synology Diskstation that I recently upgraded to DSM 5.1 (5004). I previously had my system configured to allow connections on both port 22 and port 10000. After the upgrade, it appears that ...
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1answer
28 views

Send emails over port 80 using Linux command line

I have a server that is not allowed to send outgoing emails or have access to any name servers. What it has is an http proxy that allows it to access the other servers and I am able to do wget ...
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4answers
31k views

How to specify VNC port number with Mac OS X built-in VNC client?

Is it possible to specify VNC port number in built-in VNC client of Mac OS X? I'm trying to connect to Xen VPS machine with Finder's built-in VNC client. I used address like this. vnc://server:port ...
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4answers
6k views

Why is System listening on port 8000?

I noticed by accident today that I have some unknown webserver listening on port 8000. Opening http://localhost:8000 just returns 404, so I don’t get any hint what exactly is listening there. I’ve ...
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2answers
27 views

How to view the calling script on Linux [closed]

I am trying to write a script to help with computer security. I am trying to look for open ports, find the PID, and find what called it. I have it working, where my output looks something like this: ...
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0answers
10 views

Apache on Xampp unable to start on port 80 because some system process with pid 4

I am trying to start apache but it says that the port is used by process with pid 4. When i look for the process its a system process , and am not able to end it using task manager. So i changed the ...
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0answers
24 views

Cannot listen/use any port on my windows

I have windows 7, and my PC cannot use any port, i tried apache2, and it says it cannot bind to port 80, i changed to many different port, 8080, 81, 82 .... i tried mysql, same thing happened, it ...
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0answers
4 views

Is there a way to disable rather than switch off Listen in Apache config?

In my vhosts.conf file I need to override "Listen 80" set in httpd.conf but don't find a way how to do that. Adding another "Listen" directive works, but I just want to disable the "Listen 80" ...
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1answer
3k 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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3answers
2k 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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3answers
23k views

How to get a Port to listen on Windows 7?

I have followed the step by step instruction to open a port on Windows 7, setting both Inbound Rules and Outbound Rules to following specification: Protocal Type: TCP Local Port: 55000 Remote Port: ...
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2answers
2k views

Forwarded port 80 to VM using VirtualBox, how do I open access to network?

I forwarded port 80 to my Ubuntu Server VM, and the website is very much accessible locally. How do I allow incoming port 80 connection to Windows 7 (so it will be forwarded to the Ubuntu Server)?
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3answers
38k views

How can I check which ports are busy and which ports are free on my Linux machine?

Is there any command line command or any other way to find and list out the busy and free port numbers on my Linux machine?
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2answers
2k views

vnc via ssh tunnel: channel 3: open failed: connect failed: No route to host

I was used to connect from A to a system B through vnc with ssh tunnel via C. I do the following: In B I start the vncserver: vncserver and let's say I get the :12 In A I open the ssh tunnel: ...
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2answers
67 views

How to view masked IP adress and port?

In my friends work place there is normally a broadband network and they PC's connect through Router and there is one website like this <10.1.1.7:9095> and i really wanna figure out what this ...
75
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1answer
99k 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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1answer
19 views

Adapter to VGA, minidisplay or HDMI?

I have a computer with HDMI and mini-display ports, and a monitor with only VGA input, should I get the adapter for the HDMI or the mini-display port?
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1answer
32 views

TCP server listen and client listen windows software

I am using Windows OS on an amazon cloud AWS with static public IP. On this machine I need to set up a TCP server to listen on port 2204 for raw data that will arrive from a GPS base station over TCP ...
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0answers
30 views

Access USB device from virtual machine (Windows 7 pro) while having host Linux (Debian 7)

I am a bit at loss to find where the problem could be. I have a computer running Debian Wheezy. I want to run a microcontroller debugger from within a virtual machine (VMPlayer 6.03). I am using a USB ...
0
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1answer
157 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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1answer
1k views

Macports gives “sudo: cannot get working directory” error, then fails

Macports doesn't work: sudo: cannot get working directory shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory error getting working ...
1
vote
1answer
62 views

Make application use specific network interface

I have an openvpn connection and I need it to work only for one application, this app uses an specific local port. I used route-nopull on my openvpn config file and then: ip route add default via ...
2
votes
2answers
4k views

Detect what outgoing ports are bypassed by firewall

My school has a firewall which limits most outgoing ports. There're only TCP/80, TCP/443, TCP/21 allowed. Is there's a way to find out all the outgoing port allowed by the firewall? My current idea: ...
1
vote
1answer
31 views

What's the netstat command to get the process name and only for a specific port?

I'm using netstat on Windows 7, I would like to get only the process which are using the port 80 and to get also the name of the process. Not only the PID. I've found this solution to add the process ...
3
votes
1answer
5k views

How to Password Protect USB Ports?

Is there a way to Password Protect the USB Ports in Windows 8 so that every time a USB is inserted a prompt comes out asking for a password before it can be used on the PC ? Is this possible without ...
2
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0answers
84 views

Port 4567 open on router to 'tram' traffic…Should I worry?

When I do a port scan on my router (nmap 192.168.0.1) the result is: PORT STATE SERVICE 22/tcp open ssh 23/tcp open telnet 53/tcp open domain 80/tcp open http 443/tcp open https ...
4
votes
6answers
279 views

What is this port on my computer?

What is the name of the port shown in the picture? This port is on my old NEC Versa LitePad Tablet PC http://www.superwarehouse.com/NEC_Versa_LitePad_Tablet_PC/VL-PAD-933/p/243017 ...
5
votes
3answers
5k views

How to discover if a specific address/port is reachable?

I need a simple utility that allow me to check if a PC, attached to a local network, is able to reach a specified address:port using specified protocol like TCP or UDP Machine's OS I will use to do ...
0
votes
0answers
13 views

Reverse port forward using windows

I've got a VPS (vps.mindfulhacker.tk) and I'm running a game server on my windows machine. IF my machine was running linux / mac, I could use the following command to make my game server accessible ...
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vote
0answers
57 views

Port remains blocked after opening

I have a TP-Link WR841ND Router. To test a server, I've had to open port 69. When the router is connected to my internet at home, and I do the router's routine of opening a port (I know how, have ...
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0answers
23 views

DVR is visible LAN but invisible with WLAN

I'm trying to get a DVR (H.264 video surveillance system) a connection. Here should include ports 80, 34567 and 34599 open. I also have a forwarding address and the DVR is forwarded in my router so ...
2
votes
1answer
56 views

Is forwarding to port 9 (discard) essentially the same as blocking a port?

My router (Linksys WRT1900ac) seems to leave port 4567 open, as discussed in this question. I'd like to block that port. Unfortunately I see no easy way in the Linksys admin console to simply drop ...
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0answers
22 views

Maximum concurrent sessions to a web server

As far as I understand connecting to a web server, as a new session is established from a client to the web server, they form a socket with a receiving and sending port for each machine. As the ...
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votes
7answers
11k views

WWAHost.exe using same port as Apache

I have installed XAMPP 1.8.1. on my Windows 8 64bit machine. I'm now facing a problem with ports. This is what I got from XAMPP Control Panel: 11:52:43 AM [Apache] Problem detected! 11:52:43 ...
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0answers
84 views

Netgear wnr2000v3 Router accepts Telnet connection but sends no data

A port scan of my Netgear wnr2000v3 Home Router reveals that TCP port 23 is open and running telnet as a service. When i try to connect to the router using Telnet (Windows built in client) the cursor ...