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Questions tagged [port]

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 to Automatically Add Port to URL

When I type in a url, usually I want port 80 or 443, but oftentimes, if I am typing in something that is locally hosted, I want a different port. Is there anyway, in your hosts file or something, to ...
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1answer
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How can I see if my serial ports are rs232/485?

I need to have a PC with a RS 232 port and a 485 port, currently the PC already has 2 serials but I don't know if they will work?
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15 views

Properly block ports on openwrt

I want to block certain protocols to be used, and I do this by blocking their ports such as 53. I tried to edit /etc/config/firewall adding: config rule 'stopdns' option name 'stopdns' ...
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16 views

Why windows listening to port 3000? [duplicate]

by using netstat -n -o -a i see that process id 4 listening to that port. TCP 0.0.0.0:3000 0.0.0.0:0 LISTENING 4 By using task manager i found that process id 4 is NT ...
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I am trying to allow inbound connections on port 8333 but even though the settings are open, it doesn't work

even though my router (netgear900) says it is open (and pointed at the IP of my device that wants to use 8333), it does not work. The router says the port is open but my device is not allowing any ...
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28 views

Is there an alternative to `ssh -R` that's self-contained — establishing an incoming socket via an outgoing connection?

Is there a self-contained alternative to ssh -R [bind_address:]port:host:hostport functionality? Basically, I have a machine that doesn't have a public IP address. I need to be able to SSH into said ...
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30 views

How to block the culprit of the unknown port?

When I did a port scan nmap -p- localhost of my local system I found some unknown ports opened. I was using a closed source application when this happened and I known its this causing port opening. ...
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15 views

Have to open port 80 twice to have accessible website [closed]

Got a website set up with xampp server. Website isn't accessible from other networks unless I open port 80 twice, Lets say servers internal ip is 192.168.1.17. So I have to open port 80 for this ip, ...
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23 views

Odd outgoing smtp issue during certain times of day

Ok, so this has me stumped. I have also spoken with our ISP (comcast) and mail provider (GoDaddy), both are not only no help, but also stumped. Problem is only with outgoing email, incoming continues ...
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0answers
27 views

Add Port mapping [closed]

What does Add Port mapping mean? I see it in my computer logs from my web provider. I'm not great on computers but I know enough to see that's happening and pretty sure it shouldn't be since it's not ...
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25 views

Connecting to a service on a host behind NAT from another host behind NAT over the Internet

Assume you have a host (hosta) that is running a TCP service (e.g. a VNC server on port 5901). You want to access to this service from another host (hostb) running a VNC client. Both hosts are ...
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1answer
36 views

Why does my router have an HTTP server on port 5555?

I just did a port scan using nmap on my router (a Netgear WNDR3700) from the LAN side and found these ports to be open: PORT STATE SERVICE 23/tcp open telnet 53/tcp open domain 80/tcp ...
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1answer
10 views

Laravel page running with no servers it looks like

I have been having major issues, kind of like this: cannot create a project in Laravel , with Laravel after installing XAMPP (was able to kind of normally operate it at beginner-level with just a ...
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0answers
113 views

How could I connect to a remote router located far, far away, with an intention to browse the internet by using his current public IP address

Scenario: Let's say my friend lives 10km away With his permission I'd like to use his internet connection 24/7 as if I'm there, and browse the internet by using his public IP address, just like you ...
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2answers
63 views

how to map custom domain name against IP address and port

How to map custom domain name e.g. chat.server.com to chat.server.com:9090. I actuly want to map custom domain name like shown above with having typing to port no. Just like i type localhost and ...
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10 views

Not able to access Secure SSRS report on port 443

I facing issue with SSRS report on port 443. I can configure URL but when I trying to access in in local computer or from remote server I am getting below message. This page can’t be displayed Make ...
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1answer
14 views

Port forwarding to domain name

I'd like to mask an IP and Port with a domain, ie. so user visits domain.com and content from 127.0.0.1:4444 displays without letting the visitor view the source IP and port What's the best way to do ...
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34 views

Asus RT-AC66U_B1 Port forwarding not working only port 8443 is open?

i have an Asus RT-AC66U I just tried port forwarding port 9 and some other ports then I was going to https://portchecker.co/check to check if the ports where open witch there were not?? I also have ...
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1answer
157 views

ssh: connect to host localhost port 22: Connection refused on Windows 10

thanks in advance for the responses ! I've been trying to make a multi node cluster with hadoop, but my mates can't ssh to my server. I have hadoop working, and daemons launched, but when I try to ...
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0answers
17 views

How to make Docker for macOS listen on something other than port 8000?

I need to run other programs on my machine that also use port 8000 by default, so I need to change one of them. For example, I would like Docker to run on port 8065. I don't see anything in the ...
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4answers
130 views

Computer ports like 22, 25, 80, 443 and 3306, are they of the motherboard or of the operating system?

As far as I know as of 2018 some of the 65535 available ports has at least one of what's called a "port proto"; I know 2 such protocols; TCP and UDP, while TCP is the mainly used one. If I'm not ...
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1answer
66 views

I broke the GND (I think) pin of my devices micro USB port. How to fix it?

While putting force to plug usb cable to the port I broke the GND pin of the microUSB port. The port is probably soldered to the device's PCB, and the device itself is not disassemble friendly (Sphero ...
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1answer
45 views

AWS EC2 FTP port 21 not opened on my instance but allowed in security groups

I try to launch a node js application on a ec2 instance. I authorize the port range in my security group: I stop the instance totally and restart it just to be sure. But if I launch the command ...
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2answers
37 views

Upgrade of Dell Latitude USB port

Received Dell Latitude C400 without wireless capability. Tried usb 2.0 adapter to access wifi but got "need hi-speed USB controller to use 2.0 USB adapter". Do I need software or hardware to resolve ...
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1answer
65 views

How to setup 2 services with same DNS?

I had 2 service on a server that run on 2 different port. one of them on port 80 and another on port 3000. I want to address them with same DNS like this: http://xxx.ttt.yy : the one that run on port ...
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1answer
77 views

Tunneling through private OpenVPN on port 53

To bypass restrictions of open HotSpots, I've created my own OpenVPN server in the cloud listening on port 53. I was able to successfully tunnel through it while I was on a tethered connection through ...
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1answer
38 views

Unable to access nginx forwarded port to AWS remote instance

I have an nginx running on my local machine which is serving on port 8080. I can't forward that port through the router, but I do have an AWS Linux instance running, over which I have total control. ...
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1answer
145 views

Reserving ports in the Windows 10 Dynamic Port Range

I want to set a Windows 10 dynamic port range between 20000 and 29999 (inclusively), so a range of 10000 ports. To do this, I run the following commands: netsh int ipv4 set dynamicport tcp start=...
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0answers
110 views

Remote Desktop Connection from Windows 10 Pro to Windows Server 2016 over Internet got Internal Error

I got a workstation computer (call it Computer B), installed with Windows Server 2016 OS 64 bit and connected to router via LAN Ethernet cable. I had also login to the router admin account, added ...
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0answers
9 views

Is using a dynamic port a good solution to software-test servers?

For testing (automated, TDD, ATDD/BDD, also running on a CI/CD pipeline), I want to run a server on a dynamic port. The test shall start the server, perform tests, stop the server. This shall be ...
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1answer
25 views

Unable to connect to VirtualBox through WinDbg via COM port

I am doing windows driver debugging and am trying to connect to Windows 10 on a virtual box guest. I have set up a serial port on virtual box on COM1 as a Host Pipe with a name \\.\pipe\windebugpipe ...
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1answer
24 views

Toshiba eStudio-242 installation error

I'm having this quite peculiar problem while trying to install this printer through USB. Recently, I formatted my system and reinstalled Windows 7 Pro (x64) and I can not reinstall this printer ...
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1answer
242 views

Advanced Port redirection Windows Firewall

I need to redirect some ports on Windows. What i want is to messure the traffic on a specific port (445, SMB). My proxy runs on the same machine. The problem is i cant change the port 445. So my ...
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1answer
63 views

How can I reliably find out, if a Computer supports SATA Port Multiplier or not?

How can I reliably find out, if a Computer supports SATA Port Multiplier or not? Is it booting a live linux and issuing dmesg?
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1answer
97 views

Netcat and sharing images and html files on port 80

I am trying to setup a server to share single pictures and single html files using netcat. I have some questions about the netcat server. If I setup the server to listen on port 80, the port 80 shows ...
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1answer
84 views

IPTABLES: Blocking port to external users only

I have a server with two docker containers running. One of them is the frontend of a small application, served with http-server. This application used Javascript fetch API to fetch data from a really ...
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1answer
99 views

Telnet Linux and connecting with putty on Windows 10 with root user and password

I am trying to install and enable telnet on Linux so I can connect to it using putty on Windows 10, I followed the instructions on this link: Install and Enable Telnet server in Ubuntu Linux To see ...
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1answer
16 views

Port change on-the-fly

I have an API which reads only on ports 80/443 and I have an IIS server app that should talk with this API but the 80/443 ports are taken by Nginx. Is there a service that takes the API data sent from ...
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0answers
24 views

Server not appearing to public with VPN

I have a VPS with OpenVPN and I have connected my server to the VPN, on the server I can web browse and download through the VPN but when I start up a game server on the machine no one can see it in ...
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1answer
381 views

Specify VPN port in windows 10, “Edit VPN Connection”

It seems like i am only able to specify a hostname or an ip address as "Server name or adress", but how do I specify the port? I was trying to separate the port with colon and comma, semicolon and ...
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0answers
42 views

Forwarded port is timing out

I have hosted a website on my computer and have verified that it is accessible internally. I am using a Prima Tel Router and have set up forwarding for exposing the website publicly (Snapshot of the ...
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1answer
54 views

How to access websites serving ports different from 80?

In my workplace we are allowed to browse regular 80 and 443 sites, however my school uses 8097 and other ports on several sites. Sometimes I would like to advance some homework and connect to my ...
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0answers
86 views

Telnet not working from a specific server to specific port

I am using 2 servers (A and B) centos 7. I am trying to telnet from A to mail.smtp2go.com serverA$ telnet mail.smtp2go.com 2525 Trying 45.33.53.153... telnet: connect to address 45.33.53.153: ...
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0answers
94 views

Port forwarding through VPN using docker

I am new to docker and have set it up for my work VPN but want to know if I have gone about it in a sensible way. First I created an image that runs openvpn client and connects to work. Second I ...
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2answers
157 views

Doing an SSH reverse port forward without GatewayPorts enabled

I have two machines, m1 and m2, and machine m2 can connect to m1 using SSH. There is a machine m1bis that can only connect to m1, and there is a machine m2bis to which only m2 can connect. I would ...
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0answers
32 views

Docker silently hides the port on macOS

Here's the story. I've got a an (scala) application that runs in a docker, defined in docker-compose.yml like this: app: image: dmydlarz/foobar ports: - "9000:9000" When it starts with ...
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1answer
54 views

Not able to open port on Ubuntu Server

root@server:~# ufw allow 83973/tcp Rules updated Rules updated (v6) root@server:~# sudo ufw status verbose Status: inactive root@server:~# sudo ufw enable Command may disrupt existing ssh connections. ...
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0answers
89 views

Access to local IP on port 3000 works but 8080 does not

I went through the answers on Access local webserver on port 8080 in home network using IP-Address but it still did not address my issue. Why would I be able to access a remote (non-localhost) ...
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1answer
93 views

My computer is scanning ports 21, 80 etc in my neighbour computers, and being scanned thoroughly by another computer in the network

Checking the Traffic log of Symantec Endpoint Protection in another computer I noticed that my computer had scanned its ports 21, 80, 8080 and 4899 (using random local ports). In this image, 42.51 is ...
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1answer
79 views

Remote MySQL service unreachable due to port 3306 being blocked locally

Here is the network setup: The computers (Windows PC, RPi,...) making the MySQL connection are located in a network that has blocked port 3306 in there firewall (among others). We do not have access ...