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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How to see which ports a process is using?

While testing our software, a large corporate customer was able to detect the third-party licensing software using port 137. Up until this point we have only been aware of the license software using ...
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Apache Server to serve WordPress and Normal sites on different port

I have installed Apache/2.4.4 in my ubuntu 21. I have already had a website in this IP: 172.20.x.y is listening to port 80 i.e the default port. It doesn't have a domain name yet. I have mentioned its ...
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Why does Nginx only respond on Port 80?

I tried to change nginx' port 80 to 81 in nginx.conf file but my sample site is not responding despite listening to port 81. The sample website only responds on port 80. Also , sample site on http://...
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2 votes
1 answer
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Dovecot claims ports are in use, netstat disagrees

Attempting to start dovecot gives me this: Apr 28 13:37:00 master: Error: service(pop3-login): listen(*, 110) failed: Address already in use Apr 28 13:37:00 master: Error: service(pop3-login): listen(*...
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why is port 35128 associated with ssh2? [duplicate]

I failed to login to my root account over ssh, and when doing so I noticed this interesting line in auth.log: "Failed password for root from [ip address] port 35128 ssh2" I'm not so ...
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2 answers
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"Open" port is not really open

I used the following command to open port 2022 in Ubuntu: sudo iptables -A INPUT -p tcp --dport 2022 -j ACCEPT But if I start a web server on port 2022 it is not reachable. If I run the command to ...
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1 answer
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Nginx reverse proxy reach my site but can't get pictures

I've been struggling for 3 days with Nginx reverse proxy to realize i think, a easy thing. I have to simply reach many backend node-red (nodeJS) application from Nginx but always, with different ports....
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1 answer
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nginx reverse proxy IP_adr/1881 to localhost:1881 proxy_pass

I have read this post, and try many thing but i have issue with rewrite regex. here I have many node.js processes as backends with always different port to access. With Nginx reverse proxy in the same ...
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As of this morning varnish is not listening on configured port 80

I've had varnish running on my site for awhile now configured to listen on port 80 and apache on port 8080. This morning I noticed that varnish is now listening on port 6081. When I systemctl restart ...
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Ports are shown as openedin firewall-cmd, but nmap scans shows they are closed

I am using OpenSuse Leap 15.3, with vicibox v10. I have surfed vicidial fourms, but it seems to be an issue with OpenSuse. I have opened ports with firewall-cmd, following are the output. vicibox10:~ #...
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Query User rule blocking packet despite Windows Firewall Exemption

I have created a Windows Firewall exemption via an Inbound Rule allowing UDP traffic through local port 51820 from any remote port. I have validated via the Windows Event Viewer that my simple PING ...
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2 answers
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haproxy: close or change port 80 of stats page

The http-port has to be available for another usage. Port 80 of the stats-page has to be closed or moved to another port. Removing mode http in the default section disables the page. echo >/dev/tcp/...
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Port forwarding on a FortiGate firewall sitting behind an ISP router

I have a FortiGate firewall (30E) which is sitting behind a router (provided by ISP). The router has allocated local IP to the firewall and from this firewall subnet is created on which the server is ...
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Starting Gitlab 14.6.3 Docker (custom ports) without errors but webserver not reachable

I am trying to run gitlab docker image 14.6.3 with custom ports for HTTP (60000) HTTPS (60001) and SSH (60002). For this, I created the folder /srv/gitlabNB/ and started the instance like so: sudo ...
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Is port 25 enough for running a mail server?

A simple question, is it enough to open port 25 to internet for running a mail server that only send and recieves email, and don't have any external "clients" (imap,pop3)? (all clients are ...
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Mysql remote connect CentOS

i have problem with mysql remote connect. In my.cnf have: bind-address = 0.0.0.0 and #skip-networking. In users mysql have special user remote@% And still not working. If i try: nmap -p 3306 remote.ip....
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How to change service “access point “?

I have a service running on a certain network server. In order to interface with that service, all the other network nodes contact the server on a particular open port (the service is listening on it)....
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-1 votes
1 answer
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Incoming IP addresses still processed even if all ports closed? [closed]

Does a computer process IP addresses of incoming connections even if all of its ports are closed? To be precise: (1) computer = primarily operating system of server or router, possibly raw hardware ...
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Bind timeout and ICMP reply port unreachable

This days i got a strange behavior in my network/bind server. Each 20/30 minutes and lasting about 5 minutes i got 'timeout' in bind querys. After that time everything works fine again. My bind server ...
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1 answer
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PHP socket connection through XR300 router to a receipt printer

I have a PHP application which is attempting to open a socket connection to a printer through my router. A couple things to note - my networking skills are lacking so I may be missing something ...
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HTTPS 443 port: netstat shows wildcard but curl --insecure only works for localhost

I have a remote machine with public IP address 121.x.y.z, with Gitlab (the software does not really matter and Gitlab knowledge is not required here) installed (which uses nginx for its web interface) ...
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2 votes
2 answers
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Moving files with rsync and custom port results in permission denied

I'm trying to move some files between servers with rsync and non-standard SSH port. I can login when I just use ssh and supply my password. When I try with rsync I get permission denied. I'm not sure ...
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1 vote
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Unable to connect to MySQL through port 3306 Windows Server 2012 R2

It looks like weird happening, I've followed and fixed all the possible things but still MySQL port 3306 is not accessible remotely. Here's my setup: Machine: Windows Server 2012 R2 MySQL Server: 8.xx ...
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Port accessible and open in local but not open for outside network Windows 11 Port 80 and 443

I am running docker container on windows 11 PC. I am completely lost and spend more than 24 hours in this debugging Expected Result : Mapping subdomain to my hosted project on the docker container I ...
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1 answer
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Oracle cloud compute change ssh port fails

I am new to cloud computing and plan to use an always free compute service from Oracle Cloud to obtain a public IP address to run a website. As a basic security measure I require my machines to not ...
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2 votes
1 answer
159 views

Proxying a "port" application on relative url ("subdirectory") of same server in Apache 2.4?

I have seen How to handle relative urls correctly with a reverse proxy - however I have great troubles understanding this (and applying it to my problem), hope someone can help. Let's say that I have ...
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-1 votes
1 answer
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Interpret URL correctly which port is the webserver listening to? [closed]

I have a webserver running which i didnt install. The URL to reach the webserver is https://adomain.de:7535 I took a look at the respective service unit and noticed its listening on port 7535 (--port=...
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Connection Refused between 2 VM containers

On my host Ubuntu 18.04 I am running two lxc containers using default setups. Containers use Ubuntu 18.04 as well. I have an app running on container1 that offers an https based service on https://...
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1 answer
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How do I specify a port other than 80 when adding SSL certificate using Certbot?

I have a server which runs 2 different web servers (Apache and Nginx). The Apache server takes care of all the traffic directed to Wordpress sites whereas the Nginx server serves my Python API and ...
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1 answer
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Hosting 2 webserver machines with iis10

I have an interesting problem. Basically I'm hosting 2 webserver machines (Production and development) on the same IP address. Each one is running IIS10 on Windows Server 2019 and each has it's own ...
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What is the name for protocol 1521 (Oracle)

What is the name for the Oracle protocol used by the port 1521? Like TDS (Tabular Data Stream ) 1433 for Microsoft SQL Server.
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3 votes
1 answer
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Ansible - How many can be controlled and operation in segmented networks

I'm using the free version of Ansible at the moment. What is the maximum hosts a single Ansible controller can manage? I would assume it depends on the resources provisioned on the server but can't ...
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1 answer
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No Pods reachable or schedulable on kubernetes cluster

I have 2 kubernetes clusters in the IBM cloud, one has 2 Nodes, the other one 4. The one that has 4 Nodes is working properly but at the other one I had to temporarily remove the worker nodes due to ...
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2 answers
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How to clear local ssh port for forwarding to remote?

I'm using ssh forwarding local port to a bastion server(10.20.30.40), connect to remote RDS database. ssh -i ~/.ssh/id_rsa -f -N -L 5432:db1.cluster-1.region.rds.amazonaws.com:5432 10.20.30.40 -v ... ...
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2 votes
1 answer
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bind() to 0.0.0.0:80 failed (98: Address already in use) even though there is only NGINX running

NOTE: It turned out that there wasn't any problem at all. See comment for detail. I've just got fresh instance from Oracle Cloud, Ubuntu 20.04 Minimized. Since I am trying to run DokuWiki on this ...
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0 votes
0 answers
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Setting up Nginx: port appears as not opened

I have gained access to a CentOS 8 machine which already has a web running on port 80. I have checked that there are no firewalls running (neither firewalld nor ufw). My idea is to set up a Django web ...
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Excessive port scanning on tcp/19139

Recently, I have noticed an excessive amount of scanning attempts on port tcp/19139 for several servers. It does not appear to be an IANA reserved port and I'm not familiar with any applications using ...
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Could not SSH and when I try to connect to the server using telnet I received the error "could not open connection to the host, on port 22"

I have spin up database server using customer AMI. All of my team members are on same network and I am able to SSH and telnet to the server but one of my team member is not able to SSH and telnet to ...
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Hide nginx from nmap scan

When I run a nmap -sV scan agains my server, the port 443 is exposed as nginx. PORT STATE SERVICE VERSION 443/tcp open ssl/http nginx I want to hide this information. I tried ...
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iptables rule to drop packets with namp closed ports

When I run a nmap against my server, there are some ports that are closed. 50000/tcp closed ibm-db2 50001/tcp closed unknown 50002/tcp closed iiimsf 50003/tcp closed unknown 50006/tcp closed unknown ...
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1 answer
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Linux routing and port forwarding to a secondary network not working from WAN

I have a linux box acting as a router, with two interfaces · eth0 - 192.168.0.61 · as0t0 - 172.27.224.1 Network 192.168.2.0/24 is accesible through as0t0, so I have this routes: [root@192.168.0.61 ~]# ...
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0 votes
1 answer
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What is igrid server - port 19000?

Recently our monitoring tools is reporting a port as down, the port number is 19000. I have never seen this port before and I don't find out good information. Doing some tests, I've seen I can telnet ...
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What is the correct way to open a port on Mac OS - big sur, specifically?

A lot of people are saying to use pfctl with recent versions of mac os (prior to Big Sur) - e.g., add a line to /etc/pf.conf to open the port reload settings via sudo pfctl -f /etc/pf.conf But this ...
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-1 votes
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Can't log into Centos SSH server after changing port

I was changing my ssh server's port to create a honeypot. I changed the port through /etc/ssh/sshd_config It originally said #Port 22 And I changed to Port 69 I now realise that I can't log back ...
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How do I figure out what prevents incoming connections on a certain port?

I would like to enable SSH connections on an additional port on my machine, for reasons. It is a physical machine (not a VM), running Devuan GNU/Linux Chimaera (~= Debian 11.0 without systemd). The ...
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Cannot Open Azure VM (Ubuntu 18.04) Port

Running the jupyter notebook server on port 8888 on the virtual machine. Trying to use port forward to my desktop (running Linux Mint). The server is running on the VM alright, but the port is closed ...
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2 answers
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systemd service reports "unknown port"

On a CentOS 7 server,I'm creating a new systemd service from scratch for a new service, prometheus-slurm-exporter. (It's an application that exports data from the SLURM scheduler on an HPC cluster.) ...
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Squid Proxy Server - Port numbers - HTTP - HTTPS etc

I have a virtual proxy client and I have a squid proxy server. root@arch:/etc/squid # cat /etc/squid/acls/ports.acl 80 # http 21 # ftp root@arch:/etc/squid # cat /etc/squid/acls/sslports.acl 443 # ...
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6 votes
2 answers
658 views

How to find out what service is listening on a specific port of a Ubuntu server without proccess id?

I have decided to post this question even though there are a lot of similar questions, but none of them answered mine. I periodically check the ports my server listens to. My ubuntu OS by the output ...
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1 vote
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How to whitelist egress traffic with a NetworkPolicy that doesn't prevent Apache Ignite from starting up?

I have some more or less complex microservice architecture, where Apache Ignite is used as a stateless database / cache. The Ignite Pod is the only Pod in its Namespace and the architecture has to ...
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