Questions tagged [port]

Port is a generic term that can refer to port number (software related term), and computer hardware port. Here, questions referencing this tag refer to port numbers.

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Using tc to delay packets to several ports

After reading several pages like this this and without having a really deep knowledge about the kernel Linux, I am able to filter up to 3 ports using just the three first leaves of the tree. tc qdisc ...
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Apache redirect without port number

This might actually not be possible, but trying anyway: I want to create a container image for Apache without the need to run as root. So I set up the VirtualHost to listen to port 8080 instead of ...
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Would any port check command (telnet) work if sever application is not running? [closed]

This may be a simple yes and no question, but I haven't had luck finding answer anywhere. I am tasked with the installation of certain tools on server machines (RHEL based). The issue is, I need to ...
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How do I restrict access to all ports with source's PublicKey like SSH does?

I want a server to block any and all incoming traffic on all ports with the exception of the traffic from those machines which can be (and are right there and then regardless of the port being ...
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How can a server accept incoming traffic to port 443 if it isn't listed in netstat?

I have a server that is currently accepting HTTPS requests and the only thing that shows with netstat -plnt is this: elijahlynn@web:~$ sudo netstat -plnt Active Internet connections (only servers) ...
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Apache seems to redirect to domain name ever when not running

I'll preface this by saying I don't have a lot of experience with Apache. But currently I am running a Node process that's listening on port 8080. However, when I access that port via 'ipaddress:8080'...
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I am not able to use port 80 in my ubuntu openlitespeed server

Some file is running on port 80 how to find what is running on that port and how can I stop it and run my python(flask) app on that port
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Nginx, Nextcloud, Docker: redirecting http traffic to non-standard https port?

I have a VPS that is publicly accessible via mydomain.com and is running an OpenVPN server (10.8.0.1) I have an UnRAID machine at home that connects to the VPS via OpenVPN (10.8.0.200) abd is hosting ...
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How to find home router's port number? [migrated]

I can't access my router. I have the IP, but I don't know the port number, and I can't access it without it. If anyone knows a way to override, and access without port number, please say. Up till now ...
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Can not redirect traffic with iptables in MITM

i've been trying to make a MITM attack with Kali linux and a smartphone, using the mitmproxy tool. echo 1 > /proc/sys/net/ipv4/ip_forward arpspoof -i wlan0 -t {smartphone_ip} -r {route_ip} Then I ...
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Incoming port through openvpn problems

Here is my install: I have a server MYSRV in my 192.168.1.x LAN, its IP is 192.168.1.110. It also runs openvpn client to connect to an openvpn server REMOTESRV. 10.0.0.x is the openvpn private LAN. On ...
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Can't connect to EC2 via TCP

My Ubuntu 19.04 EC2 instance has security group with inbound and unbound rules set to all protocols, all ports and 0.0.0.0/0 IP range. I can connect to it with SSH on port 22 and with http on port 80,...
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Find the process listening on a port (not showing in lsof)

Using Ubuntu 18.04 I want to know which process or kernel function listens on UDP port 38637. I have researched this problem and found similar questions: https://superuser.com/questions/42843/...
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Can only connect to my apache Centos server on port 22. Can SSH but no browser. Runs DirectAdmin

I have a remote apache server set up running Centos7.1 but I usually use DirectAdmin on port 2222 to manage it. This problem first came about after my SSL certificate expired. I tried to get on and ...
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Guide to exclude traffic on certain ports (22, 80) from being routed via OpenVPN (client) on Linux/Ubuntu 18.04?

I'm running a VPN client on Ubuntu, and I'm looking for guidance on how to exclude certain ports from being routed through the VPN client (OpenVPN). For example, how would one go about excluding ...
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Connection timeout trying to access Webmin on port 10000 in CentOS 7

I'm trying to install Webmin so I can have a graphical interface to manage the websites on my server. By default, it should be accessible at port 10000. When I try to access it at http://myipaddress:...
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SnS: Windows 10, System HTTP process running on a port,.. What exactly is running… Jeopardy like

I'm trying to figure out "what" is running on port 8888 on my windows system. Let me say that this is a fresh reboot, I do not have IIS installed or any apache/nginx programs, there are no docker ...
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How to stop an application started with NPM's forever start?

I started a NodeJS application with forever start app.js. The code had a bug and the server is not running and not responding. When I launch it again with npm start, I see that the port is already in ...
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NetworkError: cannot connect to 'ldap://ipa.myserver.net:389' during install of FreeIPA

Problem: When trying to install FreeIPA (Version 4.6.5) the installation breaks when trying to connect to the ldap server: [36/44]: adding entries for topology management [37/44]: initializing ...
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Why connecting to a high SSH port number takes longer than a lower port number? [closed]

I have a Linux server to SSH, and the old port number was 1818. Recently there's been a network issue in my country that I had issue reaching my server port 1818. So I decided to change it to another ...
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How to setup nping echo mode to listen on an UDP port?

nping, which is part of nmap, has an echo mode: it runs as a client on one side and as a server on the other side to let you see what packets actually go through. However, I cannot make it listen on ...
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How to make Tomcat Webapp not only accessible on port 8080 but through the whole IP

I'm currently trying to set up my first V-Server (CentOS 7) with Tomcat to run a Web-App. Everything works fine now, but I am facing one last problem that stops me from releasing it: I can only ...
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Windows server 2019 kaspersky security center not visible on network

Trying to set up Kaspersky server on win server 2019 machine. Everything went ok, until I found that server's network had a Private type. After changing it back to domain, KSC became unaccessible from ...
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Ftps server doesn't work properly using kubernetes [closed]

i have a problem with ftps-filezilla and Kubernetes for weeks. CONTEXT : I have a school project with Kubernetes and ftps. I need to create a ftps server in kubernetes in the port 21, and it needs ...
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How to make srv record for ssh?

I got the port 2107 for ssh and I want to connect it with ssh.mydomain.se without typing in the port in putty? so is it possible to connect 123.456.78.9:2107 to ssh.mydomain.se?
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Apache2 Won't Start: (98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:80

I've been trying to use Apache2 to put an SSL certificate on my Ubuntu Server 18.04.4 LTS for Nextcloud, and I can't even get a far as to start Apache. I keep getting this error: Error Picture I've ...
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VPN Server Port forwarding

I got a VPN client 192.168.0.9 which is connected via a my home VPN server 192.168.0.12. (Most of my LAN clients are connected via 192.168.0.12 to use VPN). I'd like to port forward from WAN via my ...
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How to access specific ports from external client

As a warning, this is a noob question, sorry in advance. I wanted to install beancount/fava on my VPS (Ubuntu 18.04.4 LTS - GNU/Linux 4.15.0-76-generic x86_64). With SSH tunelling (with Putty), I ...
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Nginx dynamic port in iframe

I have a node application running on port 3000 using Nginx as a reverse proxy. The application displays when the user navigates to my-domain/node-app. This all works great. Inside the application I ...
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How can I intercept a socket binding call to map to another port?

Let's assume I have some executable foo and I have bar. Both are hard-coded to listen on port 80. Let's assume we have root. How can I get both running on different ports? Or one of them? You can ...
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Change Postfix outgoing port without relay

I need to change the outgoing port to 587 for Postfix without relay. The server only sends contact forms from a website and it is not used for incoming emails. Outgoing port 25 is blocked on the ...
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1answer
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Failure to access AD in Linux EC2

I have a EC2 instance called EC2-B and I configured it to use AD Connector. This is instance is in the VPC B while the AD Connector EC2 is in VPC A. I have another instance EC2-A in the VPC-A and ...
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Merge different web services to one port

I have different web services running on different ports (on one Linux host): https://host.com:101/app1/ (Flask) https://host.com:102/app2/ (Ruby) ... How can I access them through a common port (80)...
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1answer
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Nginx : port redirection

I'm using nginx as a reverse proxy and i would like to redirect the port 3000 provided through the url to the same port on the proxy pass but i'm always redirect to the 443 port when trying. Below is ...
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1answer
53 views

reverse proxy to local webapplication , which port must be open by iptables?

I want using reverse proxy (nginx or apache) for my tomcat application. I want redirect the ports 80,443 from reverse proxy to tomcat ports 8080, 8443. After setting up the reverse proxy, which port ...
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1answer
149 views

start service over systemd as non-root to bind port 80, 443 [closed]

im running tomcat on my ubuntu 18.04 headless server as root. Like in apache or nginx you can start a service as non-root with systemd and only root will start the master process to bind the ports 80 &...
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1answer
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Subdomain for specific ports?

Summary: In a broader context, I just need a way to connect to multiple servers that are all running the same services on the same network without having multiple external IP addresses or having to ...
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1answer
124 views

ssh/tcp no route to host admin-prohibited

I have two servers, .105 and .104, and I am trying to troubleshoot 'no route to host' issues when .105 tries to connect to .104 over ssh or tcp. .104 has a service running on port 16000. .105 used ...
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tc - Simulating Network Latency of Internal Ports (LAN)

I am doing some network simulations on an Ubuntu VM. I am trying to add some latency to all packets being sent to and from specific ports without affecting the whole adapter. The traffic never leaves ...
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1answer
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Bridge + nftables: How to redirect incoming HTTP/HTTPS traffic to local port 8080?

I have set up a bridge and would like to redirect HTTP/HTTPS traffic traversing it to a local port (8080) so that I can further process it using mitmproxy. So far I was using a combination of ...
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1answer
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Split requests to subdomain to 2 ports

I have a subdomain on an Apache web server that contains 2 folders: frontend and backend. My frontend is running a node application, whereas my backend has a headless CMS. I have both of these running ...
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Rust Nickel Server Not Working When Deployed

I created a simple backend server using the Rust "Nickel" framework by following the guide here: https://nickel-org.github.io/getting-started.html I can run cargo run locally and hit the local ...
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1answer
166 views

Port 53, address already in use in MAC

I'm trying to set up my own DNS server. But I can't start my server as it says port already in use. I read most of the posts regarding this, but didn't work for my mac. This is the error I'm getting....
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is it possible to host multiple server that have different IPs on the same port such as 80? [closed]

I am trying to setup multiple website domains, but from different servers and because they are different servers they have different IPs, I am wondering if I could port forward each domain to 80, so ...
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2answers
523 views

DigitalOcean Ubuntu droplet not serving port 80

I have a simple Python server on a DigitalOcean Ubuntu droplet that should serve the index.html file in the /dist folder: port = 8000 os.chdir(os.path.join(os.path.dirname(__file__), 'dist')) Handler ...
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1answer
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Do ports change for every request? Are Ip ports are different from system ports?

A typical ip address has >65k ports then again a system that runs localhost offline has port which sometimes face conflicts. Am very under-read in this area please give some light. Pardon my English. ...
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Identify what service is listening on a remote port

I would like to figure out what service is listening on a remote port. If I knew what system it was running on, my go-to would be a simple lsof -i -P, which works great. Problem is that I don't know ...
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Possible to Designate a Source Port for Putty?

Using Putty to SSH into a remote Linux (CentOS 7) server from a Windows 10 machine. I would like to know if it's possible to designate a port from which Putty connects to the server. The backstory: ...
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1answer
47 views

Ho to use NMAP to check if a port is filtered by a firewall?

I have the following situation. I should have the access to a VM via SSH but trying to connect to this machine I obtain no response. I suspect that some firewall rules are blocking my request (so it ...
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1answer
57 views

How many ports HAProxy machine opens

I have below port range configured cat /proc/sys/net/ipv4/ip_local_port_range 32768 61000 So, 28232 will be no.of available ports I have HAProxy Configured to take 5000 connection with 2 processor ...

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