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 detect which process is doing a port scan

I have Linux server running a unauthorized process (which I do not know the name of) which is doing a port scan from the server out to the internet. How do I find out which process this is and kill ...
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tomcat cannot change port 8080 to 80

I want to change the port 8080 to the default HTTP port (80), to use a Jersey Application as HTTP-Restful API. Therefore I replaced the port from 8080 to 80 (within /etc/tomcat7/server.xml) and ...
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how to check connectivity to server by windows tools?

I need to check if client can connect to server on specific TCP port. Server is listening on it. Tried "telnet server_IP port" but telnet is stuck when I see that it's connected to the server. Seems ...
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Allow iptables to allow ip range only on specifc port

In this question I see a line like this that will allow me to say "allow these ip addresses to connect" iptables -A INPUT -m iprange --src-range 10.50.10.20-80 -j ACCEPT Now, I want to further ...
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MS SQL Server Dynamic Port Range

I understand that a SQL server named instance will default to dynamic ports, and I know HOW to change that to a static IP: ...
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Installing gitosis and closed port? [duplicate]

I'm trying to install gitosis on a Server (hosted by OVH and running Ubuntu server 11.04). I've done it a few times and never had any problems. But this time I have something very wired when I simply ...
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Where is the webmin port number stored? [closed]

I made a typo when changing webmin's port number; now, I don't know what it is. How can I change it?
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Restrict a port to a single app

I'd like to restrict a range of udp ports to a single application (or a user). What I'd like to achieve is not simply blocking a bind() from other uids, but also remove the range from a pool that can ...
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Phantom NIC issue causing eth0/1 to drop out

We are experiencing a very strange and frustrating problem. Our company has servers here in Massachusetts, as well as in California. The issues we are seeing are only on the CA hardware. Out in CA, we ...
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What port should I use for my reverse proxy to Apache 2 from nginx?

I have nginx setup as the defacto port 80. I want to setup django+mod_wsgi on Apache2. I'm worried if I leave Apache2 as 80 it will cause a conflict. Is it better to avoid the headache and change ...
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Opening port 5432 on ubuntu

I am trying to open port 5432 on ubuntu using ufw using sudo ufw allow 5432/tcp I then use nmap to see if port 5432 was opened and i get this: root@domain:~# sudo nmap -sS -O 127.0.0.1 Starting ...
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What are Port 45702 Visits?

Been looking in my iptables logs and there are hundreds of different IP's trying to access port 45702, Google doesn't seem to know much. They always arrive in blocks per ip Jun 3 00:59:49 ...
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Solaris ethernet ports: nge2 and nge3 are missing

There is a Sun X4100 with an interface nge0 which is configured and working. The server has a group of 4 network jacks in the back and nge0 corresponds to ethernet port 0. I tried enabling ethernet ...
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Linux Port 80 to redirect to a Windows box

I have 2 servers here at work. One is a Windows 2008 Server R2 (for safety's sake, lets use 192.168.1.100) and the other is a Fedora 14 (192.168.1.101). Currently when you hit our subdomain, ...
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fwbuilder: port forwarding incoming 222 port requests to a local machine 22 port

I am using fwbuilder to setup my iptables rules for a public server. The idea is to forward external requests from the 222 port to a local machine's ssh port. The settings i used are: NAT section ...
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1answer
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How to install newer port (PHP >5.1) on older release/world?

On my FreeBSD (home) server I have installed 6.2-RELEASE-p8. This "includes" PHP 5.1. I need to install PHP 5.2 now (because of a dependency, 5.3 would probably also work). Now my (newbie) question ...
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How does Windows 2008 specifically select ephemeral ports (does it test to avoid conflicts)?

I have a server application which uses permanently connected incoming ports within the range that W2k8 now uses in the IANA recommended range of ~49000-65000. (For legacy reasons it's extremely ...
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Can't launch glassfish on ec2 - can't open port

I'm trying to start glassfish on an EBS-based AMI of Ubuntu 10.04 64-bit. I have used glassfish on non-ec2 servers with no problems, but on ec2 I get this message: $ sudo -u glassfish bin/asadmin ...
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Stealthed vs Closed Port

I was reading a website about the difference between stealthed and closed ports. http://www.grc.com/faq-shieldsup.htm A closed port will echo a packet if closed. However, a stealthed port will not ...
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Force apache to server different directories on different ports?

For example, say I have my htdocs in: ~/public_html and those documents are being served on port 80. Is there any way to make apache server documents in: ~/public_html/something on a different ...
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Varnish on 80, nginx on 8080, on which port to put jenkins?

On my staging server, I have Varnish + Nginx. They are on port 80 and 8080. Given that I have to install jenkins, on which port I have to bind it ? (which is usually 8080 but it's already taken)
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iptables doesn't close port 3000?

I wanted to configure iptables on my server in such a way that only specific ports are open. Nevertheless I can access e.g. port 3000, if I run a web app on it. What could be the reason why 3000 is ...
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Open Ports: Apache vs. IIS

I just had an interesting meeting with security guys and the main point of this meeting I wanted to have some backup on is: Apache is secure, because it only needs port 80 and 443 (for http and https ...
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How do I save iptables config?

I have just installed Webmin on a Ubuntu server. According to the docs you need to open up port 10000 (which is what Webmin runs on), with this: iptables -A INPUT -p tcp -m tcp --dport 10000 -j ...
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How to determine which TCP/UDP ports are being opened by a given process (linux)?

I know how to do the opposite (find out what process has a given port open) using lsof or netstat, but extensive research on Google hasn't helped me solve the reverse problem. I know I could use ...
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Cannot access port 80 from remote location but works on local?

I have a linux server on configuration with apache. However I cannot get access to it using a remote computer. I can ssh to the server normally. my IP table: Chain INPUT (policy ACCEPT) target ...
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How to open port 555 on Linux / Debian

I want that phpmyadmin to work at mysite.com:555 (555 port) # phpMyAdmin default Apache configuration <VirtualHost *:555> Alias /phpmyadmin /usr/share/phpmyadmin <Directory ...
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1answer
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Firewall Port Mapping, Good or Bad?

Is it worth the trouble to map open ports in the firewall from some inconspicuous port number to the correct port number for a given service? Or is it simpler and similarly secure just to present ...
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861 views

Setting up SRV records for a Minecraft server

I have a Minecraft server listening on port 25566, and I'm trying to set up an SRV record on my domain so you can access that game server by just typing the IP address: play.example.com. After many ...
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How do I create Virtual Hosts for Different Ports on Apache?

I want apache to do this > mydomain.com:80 --- opens var/www1 mydomain.com:81 --- opens var/ww2 mydomain.com:82 --- opens var/www3 Problem is I dont know if those ports are open on Linux (how do ...
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What is “Radan HTTP”?

There is a service using the 8088 port on a Linux server I use. It identifies itself as radan-http, and indeed it's on the IANA port list. It is apparently being used by Nginx. But, despite a fair ...
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How do I check if a port is open on Red Hat Linux/CentOS

I've written a program that is suppose to implement SLP (rfc2608) and I'm having trouble testing it. I'm not sure if the port is closed or there is something out there dropping my multicast ...
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How to open OpenVPN port (1194) on server?

I have been installed OpenVPN server on my CentOs VPS, and it started successfully And try to configure iptables for it by following command: iptables -A FORWARD -m state -–state RELATED,ESTABLISHED ...
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OpenBSD has open ports in default installation

I have been considering replacing Ubuntu with OpenBSD to improve the security on my local server. I need to have ssh access to it, and I also need it to serve static web content - so the only ports I ...
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Ports being used on Windows XP

I have a MySQL db running, or I want to see if its running. What command may I use to see which ports are active and what they are running?
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Why does DHCP have fixed client and server port numbers

In most client-server-applications, the port number of a server is a well-known number, while the client uses a currently available port number. DHCP is different. Here, both the client and the server ...
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is TCP port exhaustion real? [closed]

How fast would one need to allocate ephemeral ports in order to get into the TCP port exhaustion condition? I was told there are ~4k (older Windows), ~16k (newer Windows) or ~28k (RH Linux) ports ...
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How to Identify Port to a Process?

I'm running a RedHat 5.5 and I was wondering how I can identify a port to a process. This is the output of netstat and I am trying to find the process associated with port 35670: $ netstat -tulnp ...
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Why do nmap -p <port> and nmap -A scans show different results?

I have a C# application that I've written that listens on port 789. It is running on a Windows XP Professional computer. Running netstat -an | find "789" TCP 0.0.0.0:789 0.0.0.0:0 ...
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Directing DNS to different ports

Greetings all, I have a server with two tomcat services (one being run on port 80, the other 8080). What I'm wanting to achieve is to have two different DNS records for these two ports, so they'll ...
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outbound ports that are always open

What are some ports that can NEVER be blocked outbound in firewalls, as doing so will stop basic internet use? Some I can think of are: port 53 udp/tcp -- dns, blocking this will prevent users ...
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Is there a section of ports reserved for in-house use?

Example uses A backend webserver that is called by the world-visible webserver. A static NAT table for the public to use a port number to specify which server they are connecting to. A software that ...
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Linking Domain Names to Port Numbers

I have a [game] server (CentOS) that has about 10 used ports. For one game in particular, I have 2 servers: a private one and a public one. The IP for them is the same, so to differentuate between ...
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How forward one port to other using ssh or any other tool?

I have a legacy application listening on port 5050 bound to localhost interface (i.e. 127.0.0.1). This app runs on a Linux box (an embedded system). I have an app, lets call it App C that runs on PC ...
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Which ports to open for DB Mirroring

We have two physical servers on the different area protected by firewalls. We need to use DB Mirroring for our purpose. So which ports we need to open between two area for using MS SQL 2008 DB ...
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Binding Apache to Specific IP Address

I have three IPs. I am trying to bind Apache to two of my IP addresses to leave the third free for other uses(Node.js). At present, Apache is listening on all IP addresses. httpd.conf: Listen 80 I ...
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How to set up a secure Git repository?

I followed this tutorial to set up a git repository on an EC2 instance. http://git-scm.com/book/ch4-4.html. Basically, I add a new git user and include my public key in authorized_keys. After setting ...
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Automatic/scheduled check for open ports on list of servers

I need a way to configure a scheduled check for open ports on a list of servers and to get notified if something has changed from last check. what's the best way to do it? If there is some solution ...
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Limit maximum incoming connections to a port using iptables

I have a server that has apache listening on a number of ports. Some ports are used for configuring the server, and another is used to download large files. My problem is that when I have a large ...
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can visualsvn server be bound to more then one port?

I know i can go to the visualsvn server properties and specify the port and IP address. But what i would like to know is if i can specify a different port for different IP addresses? For example, say ...