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.

learn more… | top users | synonyms

-3
votes
1answer
13 views

How are Ports Used and Represented in an Operating System? [on hold]

How do ports exist in an operating system? Is there some file for every port that exists? And how are the ports then used? Is data in some form directed to be sent to a specific port? I do not ...
0
votes
2answers
15 views

random open ports on nmap scan

My machine has the IP address 192.168.1.50 . When i do the following nmap scan nmap -p- -sT -Pn 192.168.1.50 from the same machine, i get at each scan some random open ports. And these random open ...
0
votes
1answer
25 views

Windows Command to check if a remote server port is opened?

I have two Windows Servers.. Server A and Server B. There is a service configured on Server A to listen on port P. Is there a way to check if the port is opened in Windows Server B irrespective of ...
1
vote
0answers
16 views

bsd (osx) pf nat - change source port on outgoing UDP packets

I am running docker-machine on osx. docker-machine is running NAT so when my container send out a UDP packet on port 1812, NAT is translating it to some random port. I am playing around with pf nat ...
0
votes
0answers
11 views

UDP port 9987 wont open on my firewall

I have a zywall-usg-200 and i have tried to open ports, i managed to open two TCP ports but the UDP port 9987 fails, cant connect to it. Does anyone have the same problem? Or is it just my firewall
0
votes
1answer
44 views

I am not able to connect my software with my public IP

please help me in port forwarding. i m stuck in the middle. suppose my local ip is - 192.168.0.103 and public ip is - 49.248.xx.xxx I have D-link DSL-2520U ADSL2+ modem router so here is what i do, i ...
-3
votes
0answers
25 views

Port forwarding with 2 routers

I live with my dad and he is very particular with his networking. He doesn't trust me with his router and therefore won't allow me to port forward. He told me to get my own router and do what I want ...
0
votes
0answers
68 views

Cannot Connect to server

I'm developing an application, and I need to connect to the server by app through port 5222 (TCP). My host doesn't have a domain name (just an IP address). In my local network I can simply connect to ...
0
votes
0answers
22 views

I don't know what kind of port this is [duplicate]

I wanted to find out what the port next to the USB port is called. I don't know the full specification on my laptop but it is a Dell XPS laptop.!
0
votes
0answers
2 views

Can I tell zenmap to apply a command to all known hosts?

In zenmap (an nmap gui), you can apply various scans, and it remembers the results, keeping a list of hosts you have successfully scanned. Can you tell it to apply a command against all known hosts ...
0
votes
1answer
38 views

NMAP Always says host is down (when using -Pn it says ports filtered)

I am running Kali 2.0 (Kali sana) and I have problem with NMAP, it everytime says that host is down when i scan it (even myself with firewall off)... When I try online nmap ...
0
votes
1answer
42 views

Suspicious activity on antivirus detecting port scans

Within 3 hours Bitdefender blocked 4 port scans of different IPs and Countries...I don't know what's happening. Can anyone suggest me what's going on? These are the IPs blocked! 197.89.232.231 ...
1
vote
1answer
20 views

FTP connection error with one service provider

I’ve had FTP access to a number of websites for some years using Dreamweaver on a Vista PC with Norton 360. I’ve just changed to a Windows 10 PC with Norton 360 and transfer the Dreamweaver ...
0
votes
1answer
23 views

How to set a proxy to disconnect network actions of an application from its configuration?

I'm trying to disconnect some application from network using its proxy configuration. I tested random ip and port values in my Mozilla Firefox browser but Firefox continues to open pages normally. Is ...
0
votes
1answer
38 views

Synology Diskstation has two ssh ports after changing standart port on DSM 5

I was trying to change the standard ssh port on my Diskstation, running DSM 5, by editing those two files: /etc/ssh/sshd_config /etc.defaults/ssh/sshd_config and uncommenting and changing the line ...
-1
votes
1answer
27 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 ...
0
votes
3answers
47 views

broken usb port , adapting serial to usb

Dell Inspiron running Vista sp2 has broken USB port; can I obtain an adapter to use off the 9 pin serial port that will convert to USB? If so, will it be reliable or slow compared to USB 2.0?
1
vote
0answers
17 views

Forward port 443 on DSL-N55U

I am trying to open port 443 on my Asus DSL-N55U (Annex A). I defined the port forwarding rule with no problem, but the port remains closed from the WAN. I have read that it might depend on the ...
0
votes
0answers
21 views

sony vaio laptop windows 7 drivers got corrupt

I have tried upgrade my sony vaio laptop from windows 7 to windows 10. The upgrade failed and all my windows drivers gone corrupt. Please let me know how to get at least the USB driver running. Where ...
0
votes
1answer
41 views

port forwarded to my router but not forwarded to my pc

I have forward a port to my router successfully but it is not forwarded to my PC. My router is Dlink, DIR-600m, firmware version:-3.01 and the hardware version is C1. I searched for a ...
0
votes
1answer
15 views

How can I change my routers management interface from port 80 to port 81

I have a TL-WR1043 router and I want to port forward a webserver on port 80 but the router is in the way. So how can I change the router management interface from port 80 to port 81? I heard that ...
0
votes
0answers
145 views

Cannot open ports on my router

I have a server for a game, but i can't open ports, after i open the port on router, "You get signal" port checker says my port isn't open. Before I can port forward and players can join my ...
0
votes
1answer
31 views

Which port is this? [closed]

Cannot figure out what this port does. anyone has any idea? It is on lenovo y 40-80.
0
votes
2answers
22 views

How to port forward for certain domains on OS X?

I'm running Virtualbox on OS X Yosemite and using it for web development. I added lines such as the following to /private/etc/hosts: 192.168.33.1 www.mysite.dev Virtualbox then has these port ...
0
votes
1answer
66 views

Port 80 used by Microsoft-HTTPAPI/2.0

The port 80 is used by Microsoft-HTTPAPI/2.0 and cannot be stopped. I have tried many solutions, but no one worked. Here is what I have done. Also, here is what is on the page : Not Found HTTP Error ...
0
votes
0answers
39 views

Read data from COM port

I am trying to read data from device(http://www.genee-india.com/interactive-whiteboards/genee-powerboard/) wirelessly. Port Details:. com port Silicon Labs CP210X USB to UART Bridge(COM5). ...
1
vote
1answer
60 views

Port Forwarding on a dd-wrt Router

I want to be able to forward port 5678. Here's my equipment and details: Modem: ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Router: Cisco Linksys E2000 DD-WRT v24-sp2 OS: Windows 10 ISP: Cox ...
0
votes
1answer
40 views

Setting alternative port - what are the best practises?

I'm setting up a jBoss EAP Server (right now on my local machine), in a rather strict security environment. The default port is 8080, which is also the proxy is for the network. What port should the ...
0
votes
1answer
64 views

Create a personal VPN at home to use with specific ports

I use a network where I'm allowed to use only port 80 and 22, so I can't use many app I need, I thought about VPN and more specifically I thought of using my Raspberry Pi as VPN server (I know it ...
1
vote
0answers
24 views

connecting jenkins vm to github with webhook, Windows 10

I have a Virtualbox guest VM running with Jenkins, in my Windows 10 host. The VM is exposed through a bridge, and I can access it in my browser at my Wi-Fi interface ip address. I have set up a ...
0
votes
0answers
38 views

Block Port 4000 on Window 7

On Windows 7 Enterprise 64 bit system Need to block Port 4000. Under system Firewall by creating inbound rules and outbound rules have blocked port 4000 but its not working. Need your advice. System ...
0
votes
1answer
327 views

Adding thunderbolt port to windows laptop

I wanted to ask if it is possible to add a thunderbolt port via an adapter or some other way to a windows laptop.Thanks
4
votes
1answer
65 views

mysterious port 80 blockage

Okay, this has really stumped us. This all takes place on an internal LAN - no routers involved. A computer running Windows 7 has an application that serves a webpage for users. It seems to be an ...
50
votes
2answers
5k views

Why was port 80 chosen as the default HTTP port and 443 as the default HTTPS port?

Why was port 80 chosen as the default HTTP port and 443 as the default HTTPS port? Is there a reason or was it is just defined that way?
0
votes
3answers
47 views

Swapping SATA ports causes disk to click

I have a Dell XPS 8500. I swapped the drives that we're on SATA ports 0 & 1, and when I turned the computer on, the drive on port 0 made a clicking sound, and wasn't recognized by the BIOS. The ...
0
votes
1answer
64 views

Access wamp localhost from internet

I have a website that I created on a WAMP (latest version 64 bit) server. It runs perfectly from the localhost directory. I'm now ready to have outside connections connect to my www directory. My ...
0
votes
1answer
81 views

Cannot open port 443 on modem

I'm developing a website, which requires an https connection because of the login system. I opened my Tomcat's Connector on port 443 and connecting through https://localhost works well, but i need it ...
-1
votes
1answer
113 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: ...
0
votes
1answer
66 views

How can I redirect a subdomain without needing to use a port, on a home server?

Current setup at home: Router OS - openWRT Router remote access - port 80 Server OS - Arch Linux Web server - nginx Server web server access - port 81 (port redirection done in router) Modem IP ...
-2
votes
1answer
43 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
2answers
56 views

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 ...
0
votes
1answer
85 views

Windows port forwading

i got the following setup on an windows server 2012 R2: i have 2 nics: Nic1 has an public ipv4 adress (lets call this 5.5.5.5) Nic2 has an private ip adresse (192.168.2.10) So now i want to ...
1
vote
1answer
75 views

Wake on WAN refusing to work. WOL works

Trying to setup WoW and I'm running out of ideas. I can wake it up on LAN so I know PC is setup right. I have forwarded ports 7,9 and 4343. Put in DMZ. I have tested when PC is on it does receive the ...
0
votes
0answers
35 views

Why are all my ports closed?

So I’ve tried to port forward some ports for different games but it’s never worked for a long time now. My router is an ASUS RT-N12D1. Im on a Windows 10, desktop computer with a wired connection. ...
0
votes
2answers
132 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 ...
1
vote
0answers
28 views

Problems with opening ports on Linux

Basically I have tried every tutorial I could find but I can't seem to open a port in a Linux VM. I tried downloading gufw and opening a port there; didn't work. I disabled gufw; didn't work Set a ...
1
vote
1answer
60 views

XAMPP Server is not Starting in Port 80

I am using XAMPP Control Panel V3.2.1 I have configured port no 80 When I press Start I am getting Error like below I used below cmd in command prompt for which services is running in port 80 net ...
0
votes
1answer
591 views

SSH error: “Connect to host: Bad file number”

When on my local network, I can SSH into my desktop just fine by connecting to 192.168.0.5. However, When attempting to connect to my home IP, using the same port and user, I get the infamous "Bad ...
0
votes
0answers
18 views

Unknown UPnP Entries

Was checkout out my Firewall on which I usually have UPnP disabled, but turned it on as a debugging step for an issue I was having. I just noticed three ports registered that I am unsure where they ...
0
votes
0answers
48 views

Localhost is blocking external requests, how to unblock?

My localhost (xampp) is blocking external requests. Therefore for example the WordPress gives the error message: Warning: An unexpected error occurred. Something may be wrong with WordPress.org ...