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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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My SSD is disconecting and reconecting imediatly on USB-C

I'm using Linux Mint on a HP Pavilion 17-cd1119nf. Recently, i bought a SSD T7 of samsung. When i plug it on USB-C, it get disconect then imediatly reconect when i'm using it. It can be when i ...
Getrude Annefort's user avatar
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32 views

How to achieve a git pull from a CGNAT?

I imagine my scenario to be reasonably common, so I am wondering if there is a method to achieve it. I perform development on my local machine, which is either connected to the internet over my home ...
Joe Pritchard's user avatar
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1 answer
40 views

SMTP port listening for relay/submission

I have been reading the SMTP spec and other related RFCs (mainly 8314 & 6409) and can not wrap my head around it so I hope you guys can help me out. I'm trying to setup an SMTP server for testing ...
biohzrdmx's user avatar
1 vote
1 answer
63 views

In Windows is there a way to check which port can be opened

I am experiencing an issue where port 64120 through 64130 cannot be opened.These ports are needed for the Eclipse SonarLint plugin. The ports are not in use, checked with netstat, tcpview and portqry. ...
carl verbiest's user avatar
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91 views

Ncat: Connection Refused when connecting on Linux server

I created a java application and ran it with docker inside a linux server XX.XX.XX.XX. That application should listen behind port 105 of that server. In fact, by executing the "netstat -an | grep ...
El_Merendero's user avatar
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48 views

Blocking [IPaddress:8080] on nginx

I have an app working on port 8080 perfectly with the domain desh.onecloudhelper.com and now when I hit the Public IP address of the Server, I can still view the same app running using the server's ...
Desh Deepak Dhobi's user avatar
0 votes
2 answers
41 views

PORT number and the deep confusion

I am new to Networking and going through the theory. Kindly help me on following query : So i came across port number which says that through this OS of node at which the packet is received will come ...
Dev's user avatar
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135 views

How to block port 135 on Windows 11 using Windows Firewall?

I was able to create a rule to block port 135 using Windows Firewall. However when looking at nmap output. The port is still open. How can I successfully block this port on Windows 11? Thanks
Dan's user avatar
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1 vote
2 answers
209 views

What could be the cause of multicast on Ports 3289, 22222 and 10004?

I've recently been monitoring my home network traffic heavily (using Netflow). Today I noticed some odd multicast coming from a Windows 11 laptop (it was left on, but unattended). I have AVG and ...
fredmeister77's user avatar
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48 views

Block MQTT port from windows firewall

I want to block any MQTT transaction from my laptop. I am using port 8883 as mqtt port as i am using TLS. I tried to change the firewall outbound rules and added a new rule to block the connection for ...
Devjeet Mandal's user avatar
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20 views

SSL/HTTPS based on port instead of subdomain?

I have my home server setup with many docker services running on a VM. I have like 10+ services. Up till now I've had all of them running locally with no SSL authentication. I access them through a ...
Nertskull's user avatar
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0 answers
61 views

Ncat inside WSL2 not behaving correctly

I have an instance of kali linux running in WSL2 on Windows 11. It is configured to use mirrored networking mode, if that is relevant. Typically, if one were to start listening on 127.0.0.1 on any ...
JavaNoob's user avatar
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85 views

Filezilla Server and Client Port 21 enabled?

I wanted to ask if it's enough when I enable the Port 21 on the Filezilla Server or if I also need to enable Port 21 on Filezilla Client? I set up Filezilla Server on my PC, added a User group with a ...
Redoxi's user avatar
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2 answers
97 views

iptables port REDIRECT works locally but not from outside

I have a server that can only listen to port 23006. I want to access it from outside and on port 443. I have systemctl setup: $ sudo sysctl --system * Applying /usr/lib/sysctl.d/50-pid-max.conf ... * ...
Aario's user avatar
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2 votes
1 answer
164 views

How does remote users connect to a device on a local network behind NAT without port forwarding or VPN? [closed]

How would someone at tech support for a product (assume for now any generic ethernet/wifi connected device) remotely access the device needing troubleshooting when the device is connected to a local ...
David_M16's user avatar
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41 views

YARN resource manager "HTTP request sent, awaiting response..."

we have Hadoop cluster with active/stand by resource manager services the active resource manager is on master1 machine and the stand by resource manager is on master2 machine in our cluster YARN ...
King David's user avatar
1 vote
1 answer
88 views

Ping varies on different Ports with the same IP (Gaming related)?

I apologize if my question is "dumb" and not in the right category, I'm new here and I am genuinely curious about it. Recently, there have been numerous complaints from users of the game ...
Little Yuuta's user avatar
1 vote
0 answers
228 views

Which ports to open on the firewall for this FTP client connection?

I'm using for the first time today https://github.com/veeso/suppaftp and I'm super happy. On my local machine everything works. On production machine it does not. On production machine there is a ...
Fred Hors's user avatar
  • 111
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0 answers
33 views

Bind different instances of a program to different Eth/Usb ports (Windows)

For my job I connect a target system to my Win11 laptop via Ethernet cable, then analyze it with 2 proprietary programs. I often analyze multiple systems per day, so I'm looking for a way to do them ...
DavidBevi's user avatar
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0 answers
113 views

How to access a folder inside of WSL remotely on another linux machine?

I have a NAS setup inside of WSL. The easy part was the server. For what ever reason Windows or Linux doesn't want to play nice with the rest of the network. I was able to get samba working inside of ...
pops64's user avatar
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2 answers
45 views

Creating a list of physical locations in intranet

For the intranet of my workplace, I have inventory data including Netname and location within building of our PCs. I would like to create a list of network wall sockets with location in building, so ...
Greener's user avatar
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0 answers
201 views

Change IPSec IKEV2 VPN Default Ports 500 & 4500 To Anothers

For some reason OpenVPN is working on my local machine very well, But IPSec IKEV2 VPN not & it only works when OpenVPN is connect. I have a domain for IPSec IKEV2 VPN & in local machine vpn is ...
helius.dev's user avatar
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130 views

Port forward page not showing on ZTE H288A

I have Orange router ZTE H288A and it must show "Port forward" page in internet > security enter image description here it should show it here but its not. I will be very thankful if ...
HurricaN's user avatar
0 votes
2 answers
316 views

Can not connect to the FTP (hosting) - Windows - port 21 issue

Here is the weird problem I have. I suddenly can't connect to any of my 2 FTP (hosting servers) (port 21) through my Windows 10. It took me two whole days now, and I just can't find out, where the ...
Marko N's user avatar
0 votes
2 answers
278 views

External port checking services claim my port is closed even though I opened it

I have a FRITZ!Box 7590 and I opened some ports for GTA online for two computers as adviced by rockstar games. But if I check the port online, then it says it is closed. I have GTA online running in ...
Black's user avatar
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976 views

Can i scan a website in nmap?

The Nmap command i wrote: nmap -A -Pn -sS -T4 -p 1-65535 <my_website_domain> and the result is shown WARNING: No targets were specified, so 0 hosts scanned. Nmap done: 0 IP addresses (0 hosts up)...
Anna01's user avatar
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0 votes
3 answers
260 views

Understanding how ports work and how are they different from processes?

I've been a part of a network operations team for quite some time now and was extracting a certificate using this command: openssl s_client -connect <IP>:<PORT> </dev/null | sed -n -e '/...
Keshav Sehgal's user avatar
1 vote
1 answer
121 views

Port Forwarding is not working [closed]

I want to be able to connect to my Raspberry Pi either via ssh or through connection like server-client from WAN which I think I need to do with port forwarding which is what I'm having problems with. ...
ZombieSpale's user avatar
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0 answers
319 views

What is the “down” service at port 2022?

According to NMAP and IANA port 2022 TCP belongs to the service down: PORT STATE SERVICE 2022/tcp open down But what is down? I cannot find anything about it. Is there any document explaining ...
HeartOfGermany's user avatar
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106 views

Home Network - Port open, Firewall rule set - still unable to connect

I'm trying to setup a Minecraft Server for the Kids to play on and ensure no adults can interact with them. I followed the tutorial on how to install it and it seems to be up and running. I just can'...
user3166462's user avatar
0 votes
2 answers
103 views

My keyboard repeats the keys even though I haven't released it

My keyboard repeats the key even if I don't release it. When I press a key, my keyboard "drops" it and repeats it again, making it difficult to type or play video games. I tested my keyboard ...
Maxrbr24's user avatar
-2 votes
1 answer
146 views

Can I use this SSD on this motherboard

Recently I bought a Western Digital SN570 1TB NVMe Solid State Drive. I currently have an ASUS P8B75-M motherboard which support my SATA SSD. However I am not sure if this SSD will go with my current ...
Great Leader's user avatar
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0 answers
80 views

USB port from Host device is not charging the charging cable is getting hot and burnt colleagues laptop

USB host device has an HSD connector, which is connected to USB 2 port with a length of cable about 2 meters. When I connect my phone for charging, I can feel the USB cable get hot and phone does not ...
Jamal2189's user avatar
1 vote
1 answer
371 views

MySQL Docker container on Plesk isn't accesible from the exterior

I'm trying to set up a MySQL database to use it externally. I have a Ubuntu server with Plesk and Docker. The main problem is that when logged in the server the port seems to be used/open, but ...
5n10m's user avatar
  • 13
0 votes
1 answer
429 views

Do I risk damage my usb port when connecting two laptop using regular phone cable (usb A to usb C)

So my friends requested some files from my laptop, as he seat next to me, he hand me his phone charger cable (similar to what the picture shows) I connected the usb A part to my laptop, he connect ...
Liso's user avatar
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0 answers
103 views

Port is open and process is listening but server respond with ERR_CONNECTION_TIMED_OUT

I am forwarding external port 80 to local port 3000 that has Node.js listening and I have successfully configured DDNS in order for the client to be able to access a web app that I am currently ...
AmineBinOthman's user avatar
0 votes
0 answers
91 views

Can’t port forward Sven Co-Op Unturned server but I can port forward a Minecraft server

Can’t port forward Sven Co-Op Unturned server but I can port forward a Minecraft server. I cant port forward these games, and I think I know why. These games are UDP while Minecraft is TCP why cant I ...
Gintas Jonelis's user avatar
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0 answers
47 views

RPC Port-flapping in Active Directory

Have you ever experienced RPC port flapping in Active Directory servers? In deploying an agentless server performance tool we experienced RPC connection issues that gradually opened up over a few ...
Patrick Burwell's user avatar
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0 answers
101 views

Is it possible to force an application to connect to Internet via specific allowed UDP port?

If I execute : netstat -tulpn On an cachy (Arch derivative) distro, I find: Not all processes could be identified, non-owned process info will not be shown, you would have to be root to see it all....
Sean's user avatar
  • 127
0 votes
2 answers
661 views

linux + how to verify the dynamic ports allocation settings

How to know the range for the allocation of dynamic ports on red hat Linux machine From Linux we did sysctl -a | egrep "net.inet.ip.portrange.first|net.inet.ip.portrange.last" but those ...
King David's user avatar
2 votes
1 answer
644 views

How to reserve port number and avoid other applicationsto use this specific port number?

We have a Linux machine running RHEL version 7.9. In this machine, we have installed the Ticktok service, which uses the port number 4590. Sometimes the service stops and doesn't use port number 4590. ...
King David's user avatar
1 vote
1 answer
127 views

How to start a script when there is incoming traffic on a specified port?

I'd like to automate the start of my mc-server when I am logged onto my computer. I have registered a public DNS, which is available 24/7. There is nothing running on that domain though, as it is just ...
Exo01's user avatar
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0 votes
0 answers
243 views

Pptp port forward mikrotik

I am connected to a pptp server(mikrotik). My client is outside the local network of the mikrotik. I want to use my client to host a media server which I want to be forwarded through the mikrotik ...
Pest Control's user avatar
1 vote
1 answer
2k views

Why can two containers in host network namespace both bind to the same port?

I was working with Docker containers with --network host set and realized, that if I bind to a port in one container I can still start a second one which binds on the same port without any error ...
Benibr's user avatar
  • 113
0 votes
0 answers
199 views

How do I block port 1234 in localhost without killing the process in MacOS

I have a requirement to close a port without killing the process to test out a certain fallback scenario. I am using MacOS and I am unable to figure out how to do this, can someone please help? I ...
AP_22's user avatar
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1 vote
1 answer
2k views

How to make local application accessible for other pc in my local network

I would like to host an application from a local Windows pc, for my local network I have an ASP.NET Core application (running in debug mode) on Windows pc A (192.168.1.10) on port 5001 There is ...
THEoneANDonly's user avatar
1 vote
1 answer
692 views

My Ports are always Occupied and no Software Shows why (netstat, TCPView)

I have this frustrating Problem that my programs cannot connect to their designated Ports. I'm using a windows 10 machine and this is how my problem goes: I open a software which needs port 5053 or ...
DeDifferentOne's user avatar
1 vote
1 answer
132 views

Repair RJ45 socket after plugging in RJ11

Background My family member tried to plug a RJ11 into the RJ45 sockets on my modem and router. Now my internet doesn't work as well as it did before. What I know I read that that the RJ11 may have ...
hlp's user avatar
  • 111
0 votes
2 answers
2k views

How to interpret Open | Filtered status of port scan?

I have Softether VPN server running on Windows 10 PC. My ISP offers me CGNAT (IP4) and GUA (IP6). I have configured it to accept L2TP Ipsec with preshared key. Now I am checking the open port status ...
rajeev's user avatar
  • 1,676
0 votes
0 answers
261 views

How to send emails without outgoing port 25 with Plesk and postfix?

I have a VPS server running Plesk with postfix and my IP is blocking outgoing port 25. Do you know how to set up my server to send emails from it? Can't some other ports be used for this? I managed to ...
Borgann's user avatar

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