Questions tagged [ports]

Use this tag for Ethernet ports. E.g. IP:port.

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I see rlm-admin and tor-socks port opened on my machine should I close them?

I ran the following command to see what ports are opened on my machine i.e Ubuntu 21.10 x86_64 nmap localhost and got the following result Starting Nmap 7.80 ( https://nmap.org ) at 2022-01-15 16:25 ...
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61 views

https://localhost:443 becomes https://localhost

I launch a web application by sudo PORT=443 HTTPS=true ./node_modules/.bin/react-scripts start. Then, I run https://localhost:443/#/start in a browser. It does open the start page, but the url becomes ...
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74 views

Why should registered port numbers not be used as public ports? [duplicate]

Registered Ports (1024 - 49, 151) are port numbers that gets registered with IANA for public use. Assume I have a popular application like discord, running on some port using a different protocol ...
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147 views

What exactly is a Registered port [ 1024-49151 ] and how to use it?

I've come across the below definition for registered ports, Registered Ports 1024-49151 are available for registration at IANA for more common purposes since they are available for regular users to ...
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107 views

Bypass ISP blocking Ports?

how to bypass isp blocking opening ports? im just trying to open a minecraft server to play with my friends so we can play, but it seems like my internet provider is blocking it. and this is weird cus ...
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362 views

Port trigger - How to set up

What is best security wise, port forward or port trigger? What ports shall I put in "Port target" and "Port trigger"? CSGO uses, for example, 27000-27031 UDP, so does it open up ...
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476 views

How does docker port mapping work on windows?

As far as I understood, it uses iptables on Linux and it allows to forward traffic not only by ip but also by port. Now, in case of windows we have docker running in WSL2. Image name is docker-desktop....
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83 views

Same ports with different domains(subdomains) with different services(websites) on same server

Here is my setup: -RasPI static ip with 192.168.x.x resolving to my domain blah.xyz and port 443 open on my router forwarding to my Pi -Vaultwarden(bitwarden) running within a docker container using ...
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3answers
251 views

How to Stealth Port 0 on a router

My Sagemcom F@st 3868 cable gateway (modem-router combo) has four devices on its LAN ports: a PC, a Hardware Firewall, a Cable TV Switch and a VoIP Adapter. The GRC Shields UP! test showed several ...
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2answers
107 views

Where is the port number listed in this command result?

I am running simple port scans on my system and I don't know if I am confused or not. After running lsof -i and my results are: COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME firefox-e ...
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15 views

Unknown/unlabeled ports

I have been looking into some of the Modular/Hardware Configurable/Customizable laptops, I own two Compaq Presario laptops, and although I can name Every port and slot on one of them, the other (an ...
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23 views

How to identify actual service running on a port on a remote server via the terminal?

I used nmap on my target server which returns the following services PORT STATE SERVICE VERSION 53/tcp open domain? 80/tcp open http Microsoft IIS httpd 10.0 88/tcp open ...
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27 views

Can't Find Arduino Drivers Windows 10 Precision3560

I'm unable to upload anything to my Arduino Nano because it says it doesn't have the drivers for it. I've tried going to the Device Manager and going to the USB serial to "update" the ...
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42 views

Openvpn blocks external traffic

I am looking to set up self-hosted cloud storage, and need to open a port in order to do this. This would be hosted on a raspberry pi with an external drive that I used to store my important documents....
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1answer
205 views

How to install and use scanlogd

I want to install and run scanlogd from my Ubuntu 16.04 machine. I am able to install and run it with apt-get install scanlogd and it works fine. But I am not able to change the parameters like log ...
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1answer
82 views

How are the FTP, SMTP, SSH ports used?

I know these are three questions, but I put them together because I think one connects with the other. I understand that when you want to send an email it's done using the SMTP protocol. Now port 25 ...
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1answer
34 views

Connect PC to TV from VGA to HDMI

I have a PC unit with a VGA port to which I connect my monitor and it works with no problems. When I try to connect the same VGA port to the HDMI port from the TV (HDMI IN 2(DVI)) it doesn't display ...
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2answers
272 views

How to Forward Specific Traffic Through VPN?

Before we begin, I must admit myself as more of a novice in the world of networking. Thank you. I would like to send specific traffic through my VPN, through a local machine, or through WSL. ie. ...
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How to set different TTLHOP for TCP ports

We want to set sensitive TCP/UDP Ports at low TTL/HOP Leaving other ttl/hop at 128 default data center = 3 Priv net = 8 Internet = 128 default Ssh 22 = 8 (internal hop max) Rdp 3389 = 8 Http 80 = 128 (...
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140 views

Connect to linux outside network without port forwarding

Currently I am running Lubuntu 19.04. Right now I am using samba to share my files on my local network ( anyone connected to my network can access the files ) Is there a way to access my files from ...
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1answer
232 views

Allow application to bind to port 80/443 on Windows

I really really need to allow an application to bind on port 80 and 443 on Windows. I understand that this is somehow blocked by http.sys. Is it possible to disable http.sys temporarily so this ...
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79 views

Is there a way to connect it to the PC without using direct serial port (or parallel port)?

I want to connect a sensor to my PC (MPU-9250 Nine-Axis (Gyro + Accelerometer + Compass) MEMS MotionTracking™ Device). I know that in the device drivers list there is the category "Sensors" (...
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23 views

If I am using a VPN and using p2p with specific open ports, does the VPN server have these ports open too?

If I am using a VPN and using p2p with specific open ports, does the VPN server has to have these ports open too?
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106 views

Why do most application protocols have two ports assigned?

So I am trying to learn about the application layer in the OSI model and when I go to the IANA website, I notice that most of the well known protocols have same port assigned for TCP and UDP. For ...
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1answer
24 views

host mutliple servers on the same port?

Okay, I have two physical computers on my one network, they are both running CSGO servers. Let's call them Server A, and Server B. Server A and Server B are both set to bind to the same port. But, ...
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650 views

IP camera streaming to app without any open ports

I have three no-name ipcameras that I have been fooling around with. Previous ones came with a webserver that used UPnP to make them accessible outside my home network. These ones use an app, but I ...
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308 views

Windows 10 VPN host does not accept connections

I've been trying to setup the VPN hosting in Windows 10 Pro. On the VPN host setup New Incoming Connection added dedicated user for connection specified acceptable IP range allow clients to assign ...
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1answer
1k views

Docker container available in browser but not in curl

I have a running gitlab container. The run command: sudo docker run --detach \ --hostname gitlab.domain.com \ --publish 8888:80 --publish 2222:22 \ --name gitlab \ --restart always \ --...
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1answer
86 views

connecting linux computer using vnc

I'm trying to connect to a linux computer using a vnc viewer, but the connection times out. when I type netstat -na, none of the ports listed are 5900, which as I understood is the one VNC uses. Is it ...
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iptables on Ubuntu18.04 doesn't filter when changing default-action to DROP

I am facing a issue on a freshly set up Server in the Hetzner-Cloud running Ubuntu 18.04 LTS. After installing Iptables(-persistent) and configuring the following ruleset: root@inetsec:/home/linus# ...
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899 views

Installation new domain controller throws error about used ports (88)

When I configure my server as the first Active Directory domain controller in a new forest in Windows Server 2016 I get error as below: Verification of prerequisites for Domain Controller promotion ...
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659 views

Port Forwarding Port 80 to PS4 - what about other devices on port 80

I would like to forward several ports, including port 80, to my husband's PS4 for gaming purposes. On our network I know that there are a few other devices using port 80, notably a nanny-cam. These ...
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163 views

Cant access open ports on local network including server, but can externally

I have recently purchased a new server, I have a pretty infuriating problem where ports that I open are accessible to external devices but can't be accessed by any device on the local network and even ...
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1answer
417 views

assigning com ports to usb ports of a usb hub

I am starting to automate my lab and for that I need to connect 8 devices to my computer (not enough USB ports). All of them can communicate through a virtual com port. My question is that if I ...
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1answer
697 views

What are the risks of hosting my own website with WAMP?

I already know everything I should do to, but most of the guides out there just state that opening port 80 is very risky. What are those risks, in practice? I would use WAMP and WordPress, do they ...
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1answer
21 views

Anyway to connect A/V cables to a laptop?

I want to connect the red, white and yellow A/V cables from an A/V camera receiver to my laptop so that I can cast the video from the camera to my laptop screen. But there are no A/V ports in my ...
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1answer
100 views

Setting up a SSH jump host for forwarding?

I am trying to configure a machine, B, as a proxy which means that incoming ssh connections get silently redirected to another host, for example C. As the guy who initiates the connection all I have ...
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112 views

Attempts to publish RabbitMQ data seem to be blocked

I am using RabbitMQ for syncing data between two applications. These applications reside in 2 different countries—the U.S. and China—and RabbitMQ is being accessed from both the locations. Sometimes ...
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1answer
5k views

What computer port is this? [closed]

My Lenovo X1 Carbon (6th gen) supposedly has a MicroSD card reader. But I have never had to use a MicroSD card reader before and I couldn't identify this port. I tried to put the microSD card in, but ...
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1answer
813 views

How to determine what is filtering port?

I have a number of devices they are used in electric power SCADA system, which are connected to GSM routers to send the data to a server by means of two ports 2404 and 9002. Some times the server can'...
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38 views

Flashing bios chip with i/o ports?

I'm using lenovo b490 laptop. recently bios failed on my laptop. Blank screen appears when i turned on my laptop. I'm trying to flash bios from the usb or other i/o ports. Is there any way to flash ...
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1answer
71 views

How does nc identify service names

root@nanana:~# nc -zv localhost 5432 Connection to localhost 5432 port [tcp/postgresql] succeeded! How does nc find out that postgres is listening on the port? just by common port numbers and by ...
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1answer
162 views

How can I prevent the Media Centre Extender from recreating port rules?

I have a windows 10 PC which hosts a web service for an application, so there is a port rule for it to come through 7778. Recently a rule is overwriting the web service one causing it to stop working, ...
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1answer
109 views

What am I missing in port forwarding?

I am trying to forward a specific port on my router with listening to that port number, but when I run canyouseeme tool, it shows the connection is refused. I made the inbound rule, no firewall no ...
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300 views

Port Forwarding vs Port Triggering for online game Elder Scrolls Online

My system is Windows 10 on a TP-Link WDR3600 router (no VPN). I use this computer for banking and other important things. I'm no network engineer but I've heard port forwarding puts you more at risk ...
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1answer
3k views

Can not forward docker container port to host

I am trying to forward docker container to host machine. I am using following command docker run -d -p 80:8000 nginx I have tried very hard, but not able to access nginx from http://localhost:8000 ...
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1k views

How can I properly open ports for local traffic on a windows domain profile?

I'm trying to open port 23 on a windows firewall, specifically a domain profile. The purpose is to allow communication from computers A and B to computer C, all are on the same domain. When I open ...
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52 views

Can I run my server on SSH port?

I set up server for a game on my PC and by default it works on port 25565(minecraft!) and I want people from outside my Uni network to connect to the server. I want to know if there's any way to use ...
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1answer
956 views

Restrict Chrome to using only a very small range of ports?

Is there a way to restrict Google Chrome to using only a very small range of Local Ports? Presently, Chrome is using a large range of high-numbered ports. I'd prefer to be able to more precisely ...
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16k views

How to open port 8080 on windows 10, configure firewall and any other settings?

I have a Windows 10 computer. I am attempting to get my WAMP web server on the web but have been and continue to be unsuccessful. I believe I narrowed it down to windows though. My Motorola Cable ...