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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server 2012 not receiving data on specific port

I installed a windows server 2012 r2 standard + sql 2008 r2 standard on a new dell server for a client of mine as regular workgroup file server (not acting as a Domain Controller) 3 months ago and all ...
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0answers
63 views

cannot bind a port altough LISTEN

I'm new to this problem I'm using Ubuntu 12.04 LTS via VMware My problem is to bind port 6703 i tried alot of commands to check if this port or open or not Error Message is Failed to bind to: 0....
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1answer
48 views

Track web application access through windows server

I have a web application running on Amazon EC2 accessed on the port 80. I would like to track the users who have accessed my application via windows server log. However when i go on the logs i can ...
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1answer
181 views

Why is iptables not blocking any ports?

I have iptables running and the most recent rules applied (i.e. I restarted the service and it says everything is "OK"). I have only used system-config-firewall to edit/define any rules, so I ...
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1answer
17 views

Centos Ports for Updates, Repositories etc

I want to use a Proxy-Server which is free to use from the network, my nodes are placed in. But this Proxy only allows the Port 80. My question is, if somebody knows, which ports are used for the ...
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3answers
4k views

Is it safe to serve HTTP/HTTPS over ports 8080/8443

Due to an infrastructure limitation, one of the proposed solutions for serving an HTTP service to the world is to offer it over ports 8080 and 8443. My concern is that some users may not be able to ...
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0answers
197 views

How to proxy setup nginx with play and angularjs

I am learning play framework and angularjs with nginx. The play app is running on port 9090 and angularjs app is running on 9000. I am trying to proxy all requests to /app/* to the back-end Play ...
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2answers
170 views

Linux: How to find out which ports did my application use [without being root]? [closed]

I have the following question. On a CentOS machine I run an application which connects to another system. I am interested in finding out on which ports (input/output) the communication happened. The ...
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3answers
314 views

apache2 change port from 443 to 7443

I'm using the default apache ssl conf file "default-ssl.conf" If i leave it alone using my self signed cert i can get to the page using 443: <VirtualHost _default_:443> ServerAdmin my....
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1answer
885 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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0answers
54 views

TCP and UDP ports usually blocked [closed]

Which are TCP and UDP ports most likely to be blocked? I refer especially to the client edge of the network. To start I guess SMTP (25), SIP (5060) for TCP, Traceroute (33434) for UDP.
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1answer
10k views

Why MySQL command line tool ignores --port parameter?

This is what I'm doing: mysql --host=localhost --port=9999 mysql -u root -p --execute="show tables;" The command works (connecting to port 3306) no matter what I provide in --port argument. I have ...
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1answer
23 views

Setting up Apache as fallback for webapplication server on Centos

I run a web application server (namely, eXist db) which listens to port 8080. Unfortunately, eXist is not totally reliable. Therefore, I'd like to set up Apache 2.4 as a fallback web server: Whenever ...
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1answer
28 views

Web application access permission

I have a web application that uses SQL server . SQL server is hosted on a server and accessed using port 1433 . My question is will the user who is accessing my application required to be able to ...
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0answers
69 views

VPN Server not working on AWS

I'm running SoftEther on my home computer and after some basic configuration (Server 2012 R2, ports forwarded to server), everything works. I am able to use my computer as an L2TP server. I tried ...
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2answers
30 views

Scan LAN ports for devices other than computers

I have a fingerprint device attached to a LAN and I want to figure out the port number used. I could not figure out from its settings and configuration, so I thought to do a port scan over the network....
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2answers
78 views

wget only works when tcpdump is listening

I am running two Virtual Machines over the XEN hypervisor both with Ubuntu trusty (Linaro-Developer version) with the following simple bridge networking setup: Backend domain (dom0): br0 ...
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9answers
64k views

How do I find out whether a port is available on Ubuntu 8.04?

Is there any command I can run from bash that will tell me whether a port is already open?
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2answers
5k views

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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1answer
115 views

Port 80 is not accessible, although opened in iptables

I have an Ubuntu server running by a hoster and am trying to set up an nginx server with a config: user www-data; worker_processes 4; pid /run/nginx.pid; events { worker_connections 768; } http ...
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0answers
77 views

How to redirect subdomain to other port using Apache2 server with reverse proxy

Thanks in advance for your help. I have, in my home server running Debian 8, installed Deluged (torrent client) and a web UI to control it. I can access this web UI using the address :http://example....
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0answers
355 views

Endpoint creation doesn't work in Azure Preview Portal

I'm trying to open up port 443 on an ubuntu setup using the docker quickstart for wordpress + mysql. Because my VM is classed as "new" it only shows up in the new preview portal on Azure and doesn't ...
0
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1answer
33 views

how to limit number httpd process for port 80

So lets say I have 10 instances of httpd on port 80 and another 10 on 443. I run everything through 443, so I don't see the need to balance the connections (80 is used only to redirect to 443) How ...
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1answer
25 views

Change NFSv4 Bound Port?

I need to use port 2049/tcp for another purpose. Is there a way to change which port NFSD binds to? I don't need NFSv3 or NFSv2 so I am not using rpcbind service. I cannot find that config option...
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1answer
185 views

Change the order that an IPTABLE CHAIN is read (Using Fail2Ban)

I have some experience using iptables and fail2ban. Both are working as they should, but I would like to optimize the way packets are "DROPed" when IP & port probing occur. Fail2Ban is doing a ...
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1answer
1k views

Getting 'ERR_CONNECTION_REFUSED' when trying to browse port mapped to Docker container

I have pulled a Docker image: $ docker pull ghost And run a container from the image: $ docker run --name test-ghost -p 8080:2368 -d ghost ...
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0answers
85 views

Is firewalld blocking return traffic?

I'm on Debian 7 trying to forward requests to other machines through firewalld and have the following setup: --HOSTNAME-- ----IP----- ------------Configuration------------- Firewall 192.168.0.2 ...
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8answers
43k views

How do I get rid of sockets in FIN_WAIT1 state?

I have a port that is blocked by a process I needed to kill. (a little telnet daemon that crashed). The process was killed successfully but the port is still in a 'FIN_WAIT1' state. It doesn't come ...
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4answers
301 views

azure endpoint for cassandra does not work for ports 7000, 7001, 7199

I have setup apache cassandra on a centos7 compatible linux machine in azure. I can telnet directly to port 7000, etc on the IP address on the machine, however I cannot telnet to that same port from ...
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0answers
76 views

interface not showing on port-channel (dell S5000 switch)

Our trunk went down due to a faulty cable, but when we had it replaced, the interfaces (speficially TenG 0/4 and /5) are not being shown on the port channel group even if they are physically up: Our ...
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1answer
75 views

Prevent port from being used by anything but one application

Is there a way to make only java be allowed to use a certain port? OS: Windows Web Server 2008 R2 No access to router (hosted box).
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0answers
28 views

Cant configure NAT in iptables

Есть два сервера с линукс. Первый выполняет роль роутера, он имеет два сетевых интерфейса, один из которых подключен к интернету, другой к локальной сети. Второй сервер подключен к локальной сети. ...
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1answer
123 views

iptables outgoing default policy is accept, but some ports appear blocked

I'm new to servers and iptables. I have a web app (happens to be bugzilla) running on my Centos 6.7 apache/httpd server, and it attempts to connect out to the web (updates.bugzilla.org) via port 80. ...
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1answer
77 views

only allow a specific port that can be connected by only one ip address at the same time

I have a open port, 40002, I want to limit that at the same time the port can only be connected by one ip address(not specific address). if there is an ip address conntecing to that port already, ...
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3answers
784 views

Is there a top like tool that shows processes and ports, live?

I'd like to be monitoring ports in "realtime" and the processes that use them. Is there any tool that can handle that? I imagine somethinkg like top, but with a column that lists all ports the process ...
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3answers
4k views

Examining Multiple Ports When Running NetCat (nc)

I am looking to test if specific ports are on a host are open. I am using: nc -z host 22 nc -z host 80 nc -z host 443 nc -z host 8080 which works, but it would be nice to use a one-liner like: nc -...
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1answer
81 views

Tomcat and Apache parallel usage on different subdomains

I have just set up an Ubuntu server with Tomcat7 and Apache2. Apache is running on port 80, Tomcat on port 8080. What I want to do now is to redirect certain subdomains to Tomcat. mydomain.com ...
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2answers
277 views

Can't make nginx listen on nonstandard ports (3000, 35729)

This is on a fresh install of Ubuntu 14.04 running on a VPS. For example the following will work: server { listen 8080 default_server; root /var/www; location / { try_files $uri ...
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0answers
158 views

Nginx listening on different port but not accessible from outside

OS: Ubuntu 12.04 I have both Apache and Nginx running. Apache is listening on port 80 and that is why I want to make Nginx listen on different port, in this example it would be 90. Below is the ...
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2answers
43 views

Firewall setup - Input and Output

Sorry for my english. I am having some troubles understanding if I should open ports via input, output, or both. For instance, let's take the basic HTTP port 80. To set up a standard client. If I ...
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4answers
7k views

netbios-ssn Port 139 open on Linux machine

all. I'm desperately trying to pass a Security Metrics test, I've been trying for a few days, but I 'm always left with the same problem: NetBIOS available on Linux Service: netbios-ssn Port 139 ...
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0answers
125 views

Error when viewing database mirroring monitor in SQL Server with non-default port

I have database mirroring set up (with witness) on SQL Server 2014 Standard. Both servers use default instance on a non-default port (not 1433). Mirroring works perfectly fine. However, when I try to ...
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1answer
100 views

Docker run command, expose port private only

docker run -it -p 8080 myimage /bin/bash I would expect the code above to expose port 8080 private. However when I run: docker ps -a It shows: 0.0.0.0:32770->8080/tcp How does one set port ...
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0answers
117 views

How should I set up my sub-domain to allow it listen on a port for web socket transfer?

This may be a really beginner question, but I really want to make sure I'm going in the right direction before investing time in this. Heres what I have. charlieli.me @ 45.55.33.185:80 fileserver....
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2answers
152 views

Do network administrators block outgoing traffic to not-well-know ports? [closed]

I've written a Java server to listen on port 49474. My client runs on Android phones all over the US. Of course, they will be connecting from a variety of networks: home, work, school, library, ...
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0answers
23k views

Cannot telnet to SQL Server on port 1433

I've been working solidly on this issue for the past three weeks. I cannot seem to find where the actual issue is. I just recently found this article on how to troubleshoot the connection. I made it ...
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3answers
1k views

What port does OpenLink ODBC Driver use?

I use Avaya Reporting Services and OpenLink ODBC Drivers for db connection. I know that it uses port 5000 for handshaking but after that I believe it uses an random port for communication. I want to ...
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1answer
1k views

Windows SMTP Service - Configure Smarthost for Specific Domains over different ports

I have a client that was recently acquired by a company. Their email system now resides on the parent company's network. Currently there is no VPN setup between my client and the parent company. I ...
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3answers
4k views

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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5answers
3k views

What ports are least likely to be probed on the internet? [closed]

Suppose you've got a server that runs insecure software and you have to make it publicly accessible, what ports are "safest" for providing that service on the internet. By "safest" I mean least likely ...