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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54 views

I accidentally opened a localhost port?

I had accidentally opened a port via firewall which had a WEBSITE(IIS EXPRESS) localhost port number. So could my desktop be hacked by opening a port? And also i had deleted it after a few minutes.
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0answers
1k views

How to Change SIP default port 5060

Port 5060 is blocked in our network, and I was wondering if it was possible to change it to 5222, which is a port used by Google Talk. If it is possible and I do change it, will I still be able to use ...
1
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2answers
2k views

Scanning my public IP address with Nmap finds TCP port 1720 open, is this a security concern?

When scanning my public ip address with Nmap I found out that I have open port on 1720/TCP. According Nmap service on it is H.323/Q.931. Researching uses of this port also brings up Microsoft ...
1
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1answer
235 views

How do I configure a TenGig2/1 as Gig Uplink on a Cisco 4900M ( Module: ws-x4908-10g-rj45 )?

Scenario: We were swapping out Module 2 on a Cisco 4900M from a 20-Port Gig to a 8-Port TenGig, a ws-x4908-10g-rj45 be precise. The hot swap went fine and TenGig2/1-8 sho ip int bri showed us the ...
0
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1answer
272 views

How to free a port on OS X when lsof(1) reports that it is not in use

I am a developer working in OS X on Eclipse. A bug I have been working to fix in a web application results in some very strange behavior when resetting an instance of Tomcat, resulting in the ...
0
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1answer
72 views

How to permanently set port for localhost

Every couple weeks, the enterprise security software takes my localhost port for its scanning stuff, so I try to run an app I am developing in visual studio, and the IIS Express tells me the port is ...
10
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4answers
58k views

How to kill a particular tcp connection in windows?

On Linux we can kill an Established TCP Connection using tcpkill command. For example, to drop all connection to/from a particular IP: tcpkill host ipaddr Or similary to kill all connection ...
0
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0answers
53 views

Trouble configuring 2 IPs in single NIC and configure firewalld

I hope this is the place to ask. I just moved my server from Centos 6 to Centos 7. I read that Centos 7 is now using firewalld instead of iptables. Now my problem is I have only one card and I need ...
0
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1answer
8k views

telnet port 23 connection failed window 7

I'm using windows 7 and I'm trying to connect to my router with telnet: open cmd type telnet xxx.xxx.xxx.xxx. Result is could not open connection to the host, on port 23:connection failed. What ...
4
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4answers
8k views

Can I connect a switch to a router?

Ok sorry if this is the most basic question in the world but for years I have needed more ethernet ports in my room and my whole house is wired with 1 ethernet port in each room, I also wanted to be ...
1
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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 ...
5
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2answers
4k views

How to kill a process by port on MacOS, a la fuser -k 9000/tcp

On linux I can kill a process knowing only the port it is listening on using fuser -k 9000/tcp, how do I so the same on MacOS?
0
votes
1answer
45 views

SVC Host service not visible in Svchost viewer

Some port required by my application was put in TIME_WAIT status by svchost which I found by running netstat. I used this application called Svchost Viewer to track the PID corresponding to the ...
0
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1answer
69 views

How Can I Make Two (Or More) Usb Ports Act LIke One? [closed]

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 ...
2
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4answers
4k 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
65 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
263 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
53 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 ...
9
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5answers
83k 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 ...
0
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0answers
207 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
395 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
0
votes
1answer
68 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 ...
2
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2answers
86 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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votes
1answer
812 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
919 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 ...
2
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2answers
128 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
48 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 ...
0
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0answers
15 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 ...
0
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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 ...
0
votes
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 ...
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0answers
53 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 ...
1
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2answers
172 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
352 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
1k 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 ...
1
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3answers
87 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. ...
0
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0answers
100 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
603 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
420 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: ...
7
votes
4answers
9k 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 ...
5
votes
5answers
36k 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
votes
3answers
151k 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
174 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 ...
0
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0answers
281 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 ...
10
votes
1answer
1k 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 ...
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1answer
867 views

USB hub assigning random com ports when Windows 7 PC or USB Hub are rebooted

I have four hardware devices that are plugged in through a self powered USB hub. Currently the devices are assigned COM1 COM2 COM3 COM4 through device manager as hoped. However, when rebooting the ...
0
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1answer
23 views

MySQL: Port issues on an domain network setup

I am looking for options to have a MySQL server on corporate environment where opening a port in the Windows Firewall is quite difficult (a lot of red tape). At this point I am not looking to have a ...
2
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0answers
371 views

Cannot connect SSH through PuttY even though server is online

I'm trying to connect to a server via SSH. The server is reachable according to http://www.infobyip.com/sshservertest.php and SSH works without problems on Android (JuiceSSH). However, PuttY errors ...
0
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0answers
445 views

How to block counter strike ports on router?

I have Cisco E2500 router and I need to block Counter Strike ports so that user would not be able to connect to it. Also, is it possible to block Skype ports so user would not be able to call to ...
9
votes
5answers
893 views

What ports are used by an application [duplicate]

I'm testing an application which opens its own ports (acts as a server for these ports, hence listens at that ports) and where the same application connects to ports bound by other applications (acts ...
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1answer
131 views

Apache wont start, port 80 in use by a system process, found baiduspider

Ok so I have uninstalled IIS on my windows server and decided to try Xampp to host my domains. Port 80 is in use and I have tried all of the fixes that I have came across for the past 2 days. I was in ...