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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Windows firewall - opening ports by specifying .exe

Normally, you open ports by specifying port number and the protocol - either TCP or UDP. However, Windows allows me to add exceptions by specifying the executable file. How does it work? What happens ...
2
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2answers
1k views

Cannot access MongoDB from the 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 ...
2
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2answers
14k views

Can't access my IP camera over the internet

EDIT: My problem is solved, please read comments 2-5 and 8,9. 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 ...
2
votes
2answers
626 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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2answers
43 views

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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2answers
82 views

iptables on CentOS 6.6

I'm trying to open a port on CentOS, but it doesn't seem to work: port 16 seems to be closed and 4075 seems to be open, even though according to iptables it should be visa versa. Chain INPUT (policy ...
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2answers
346 views

USB port causing device problems after new motherboard upgrade

I'm looking into a PC with an issue with one of the front USB ports (perhaps both). It was working before a motherboard upgrade but since then, a USB drive was inserted, overheated and does not ...
0
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2answers
29 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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2answers
47 views

Apache installation errors “only one usage of each socket address <protocol/network address/port ”

I get an error message when I try to run httpd.exe. I have tried to resolve port conflicts - I uninstalled skypee, SQL Server Management studio and SQL Server Business Intelligence development ...
0
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2answers
299 views

Some confusion about listening and open ports, difference between listening, open and blocked

I have been strugling for some time now to open ports on some Linux machines and I have followed some tutorials, which I tried in 2 different Linux VMs and failed for either, and after some research I ...
0
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2answers
45 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 ...
0
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2answers
403 views

Blocking ports without any firewall?

I want to close ports on my windows computer without using any firewall or similar software? Also i only want to open them when i use an explicit command. I didnt tried anything because i have no idea ...
0
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2answers
361 views

Port Forwarding a Specific Port (e.g. 22)

I'm still confused about establishing an SSH connection (port 22) between two computers on different internal networks. For example: I am on my computer with internal IP address IIP-1, connected to ...
0
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2answers
2k views

How to forward blocked ports by ISP

So I've been trying to setup a TeamSpeak 3 server on my pc but ports (9987,10011,30033) are blocked by my ISP, I've contacted them to unblock them but they didn't accept, and it's the fastest ISP in ...
0
votes
1answer
2k views

Centos 6 server does not open ports

So after some battling and struggling with the firewall, i see that I may be doing something or the firewall isnt responding correctly there is has a port filter that is blocking certain ports. Okay, ...
0
votes
1answer
48 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 ...
0
votes
1answer
996 views

Port forwarding between NIC cards

I have a network in the 192.168.10.xxx range. On one of the computers on the network there are two NICs. One NIC is in the 192.168.10.xxx subnet, connected to the main network. The other NIC is in the ...
0
votes
1answer
2k views

Find out port for a specific USB device is on Mac OSX

I have a Nexus 7 tablet attached to a Mac Min, and I need to figure out what port it is connected to. I am managing someone elses code, in which they litearally define the port: /dev/tty.usbserial-...
0
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1answer
316 views

SSH to specific computer behind a router if local IP is known

I'm hosting a number of websites out of different boxes behind a router; when I was only hosting one, it was simple enough to forward port 22 on to the hosting box and use that one as a remote server ...
0
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1answer
1k views

Ports 1935 and 843 are getting blocked for no reason

I have Windows 7, and my computer has been blocking ports 1935 and 843 for no reason for a while now. If for example, I try to watch twitch, nothing will work because those two are getting blocked. ...
0
votes
1answer
111 views

Is there a way to find all processes which accessed a linux port?

We are using Octopus Load Balancer for connecting to database from Linux. The Load balancer throws following error. I doubt if it is due to the assigned port being accessed by some other process ...
0
votes
1answer
938 views

Forcibly unbind a port in Windows?

So, I'm trying to set up a subversion server on Windows 7, and am having a problem with bound ports. I searched around a bit, and found this question about how to handle this, but I'm having a problem ...
0
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1answer
165 views

windows 7 port open issue

I set up a web server on my Windows 7 computer and want to open port 80 so outside computer could visit my web server. At first, I thought it's the firewall blocking the port, so I open a new rule on ...
0
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1answer
246 views

changing default SMTP port in Outlook Express 6 permanently

Every time I use Outlook I need to change SMTP port to 587. The problem is that every time I start the program it restores the default port 25. How can I set the port to 587 permanently?
0
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1answer
432 views

Setup SSHd on port 522 on CentOS 6.3 (x64)

I currently run a server with SSH on a non-standard port for security reasons. That was 522 on CentOS 5, but CentOS 6 doesn't (easily) allow SSH to run on any port below 1024, other than 22 obviously....
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1answer
1k views

netstat shows open port with pid for process that doesn't exist?

We have a program that listens on a port to receive info on running a report. Upon closing and reopening the program, we get an error saying that the port it uses is already in use. Looking at netstat,...
0
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1answer
1k views

Port Forwarding for RDP

I'm trying to setup Remote Desktop on my computer. It's currently running Windows 7. RDP is set to allow for incoming connections. I've followed the instructions at PortForward.com, but am having no ...
0
votes
1answer
708 views

stopped a service but outgoing port still exists on netstat -aon

bit more detail.... I have a port, specifically port 2869 for Windows Media Player Network Sharing Service that uses UPnP port 2869, however even when turning off all the sharing possibilities I can ...
0
votes
1answer
170 views

How can I monitor ports on Windows?

What is the simplest way on "local" (1*) Windows, for known ports, to: Find out if it is used. Find out as much as possible about what is behind the port. Find out as much as possible about traffic ...
0
votes
1answer
507 views

Emulate Port Blocking on Airport Extreme

I'm trying to restrict all the computers on a network to only be able to use OpenDNS so I can manage what sites they are allowed to access. I can't really do this by locking users out of the network ...
0
votes
1answer
756 views

TCP connection to my host's public IP address using Linux netcat

I need to make a TCP connection to my machine through an application that needs only the public IP address and port to connect. I have been able to do it in Windows, but I need to do it in Linux also....
0
votes
1answer
5k 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 ...
0
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1answer
723 views

8080 port in nginx not able to serve for certain wordpress website

I don't know if it's related to the domain records pointing rules. I configured for other website as well and they are fine. I used 8080 as the port for the websites. But for this particular site, ...
0
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1answer
75 views

How can I connect to a home automation web controller?

I've bought a remote web controller for home automation. I'd like to write a client software by myself, because the built in interface is ugly & not user friendly. Thus, I'd like to find the ...
0
votes
1answer
162 views

Can't access port forwarded to Windows 7 machine

Before, I never had this problem with Windows 7 – the router always had the same settings like below. Installed Windows 7, all drivers, etc. Updated Windows 7 to SP1 (a bunch of KBs before SP1 ...
0
votes
1answer
119 views

Impact of deleting VLAN over Port Admin/oper status?

Is there any use case where deleting a VLAN causes an interface's admin/oper status changed?
0
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1answer
741 views

Web Interfaces not opening even after Port Forwarding is said to be working!

I'm encountering this strange problem which has baffled me to the ground, and which I haven't encountered even after years of doing port forwarding .. ! I am hoping somebody here can help me solve ...
0
votes
1answer
122 views

Open Port \Win 7

when doing the download\upload test in UTorrent program it claims my port is not open (Default 17690). After I plugged my machine directly to the modem (suspect of port forwarding not working), ...
0
votes
1answer
245 views

Ubuntu mail PHP port error

I was able to send mail up until last week when godaddy changed there mail server name. Im not sure what file to update with the new server name. Im getting this error message when trying to send ...
0
votes
1answer
950 views

port forwarding with dynamic ip address

I'm new to this stuff, but I am trying to set up an ssh server in Ubuntu. I am able to log in locally to the server, but when I am off the network, I get "port 22: Connection Refused". Having spent a ...
0
votes
1answer
688 views

Win 2k3 Connections Limit per ip:port

I want to limit connections number per ip on specific port. Should I use some firewall or anything else? Advice please. P.S. Port doesn't have to be port 80, or 3389. It can be any port
0
votes
1answer
1k views

connect to paltalk server using a proxy

Hi I want to use paltalk, which is a kind of chat software, but the ports that this applications uses are closed in my country. What I need to do is to use a proxy server. Unfortunately the software ...
-1
votes
1answer
21 views

What are the basic commands for ufw firewall in Ubuntu?

I want to setup ufw firewall in ubuntu. Please list some basic commands that I need to learn to operate it via termianl.
-1
votes
1answer
44 views

VPN tun interface ports are closed

I have an issue with accessing my server of Cryptully chat under vpn. What I did (S - server side, C - client side): S: python cryptully.py -s -p 1242 S: sudo netstat -autpln | grep 1242 tcp 0 ...
-1
votes
1answer
423 views

Port forward localhost using Xampp

I have built a wordpress site on my localhost:8081 . Now i would like to access it from the internet(please dont suggest ngrok etc etc). I have a netgear wgr614 router. Now this is what i have done: ...
-1
votes
1answer
313 views

Connecting to Apache server over SSL when it's behind NAT and the public IP & port are known?

I want to connect to an Apache server over SSL (with both client & server certificates) when both the client and server are behind NAT firewalls. I can't port-forward and I have to assume that all ...
-1
votes
1answer
201 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 ...
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votes
1answer
47 views

Understanding Ports

Total laymen trying to get a grasp on my home network. I have noticed that my sons laptop is consistently running with port 445 "SMB directly over IP" and was wondering if someone could tell me if ...
-2
votes
1answer
129 views

Forwarding port to a VM - How to?

I use Win 8 Ent x64 on my PC, and I also have a Win 7 VMware virtual machine set up using a bridged network adapter. The IPv4 number for the Win 7 VM is 192.168.1.115. I require access to the VM ...
-4
votes
1answer
811 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