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.

learn more… | top users | synonyms

-1
votes
0answers
13 views

vsftpd set passive port lower than 1024

I have vsftpd running on an up-to-date Arch Linux system. Currently the FTP server is working just fine, but the passive port range (7000-7100) is blocked by the firewall of a network from which I ...
-2
votes
1answer
40 views

Is there a way to port forward a port to alternate between 2 ips [on hold]

I have a server on a laptop that I move a round. if I am at my station I have Ethernet IP-address e.g. 192.0.0.1, and when I'm not I have the wifi IP of 192.0.0.99 is there way to make my router to ...
0
votes
2answers
26 views

UDP/TCP ports on AWS ec2 public IP blocked

My goal is to receive/send UDP packet traffic on specific ports on my EC2 instance (on my eth0 private IP) via my public IP. I am asking because I have set my security group to allow all ...
-2
votes
2answers
34 views

Finding the server that blocks port [on hold]

Is it possible to find which server is blocking one specific port using unix tools (on a complex local network)? I know the server to which I want to connect and also the port. But something seems ...
10
votes
7answers
30k 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 ...
19
votes
8answers
49k views

How to check if a port is open for remote system(ubuntu) [on hold]

Is it possible to check that if the ports are open for the remote system on ubuntu server? I should able to check if a port(eg:ssh) on my machine is open for the remote machine.
0
votes
1answer
963 views

iptables denies internal access to port 17500

In the kernel log there are hundreds of these lines. The source is the external IP of the VPS (not localhost nor 127.0.0.1), other times an IP of the network of the VPS provider. The source port and ...
0
votes
2answers
57 views

Unable to connect via apache port

I created a new VirtualHost file with the folllowing parameters: <VirtualHost *:6060> ServerAdmin xxx@xxx.systems DocumentRoot /var/www/xxx/httpdocs <Directory ...
1
vote
1answer
26 views

Enabling LDAPS: Cannot get to open port 636

I have a domain controller, which has Active Directory (AD). I want to turn on LDAPS on this AD, so that I could access the AD via secure connection. I have followed the following guide: ...
0
votes
0answers
15 views

Opening port 8000 for WCF on Azure

I created a virtual instance on Azure and deployed a couple of WCF services for testing, and also installed IIS. Then I added TCP endpoints for ports 80, 8000, and 8001. The services run on ports ...
0
votes
1answer
839 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 ...
1
vote
4answers
3k views

How to run node.js app on port 80? Are processes blocking my port?

I believe the port 80 on my remote instance is blocked, and I am trying to run a node.js app using port 80. I have experimented with ports 3000 and 3002, and both ports are working fine, but I get an ...
1
vote
0answers
14 views

Hadoop namenode port getting blocked

I have installed 7 VM instances of Ubuntu 14.04 LTS servers. First instance runs the namenode service and all other 6 nodes run datanode service.I think my NameNode is getting crashed or blocked due ...
0
votes
1answer
29 views

Passive FTP high port range - could the port actually be different?

When using Passive FTP, is it possible that the port number specified by the server could be altered in any way? For instance, if I see in the logs on my server the following, is it possible that the ...
19
votes
7answers
99k views

What firewall ports do I need to open when using FTPS?

I need to access an ftps server (vsftpd) on a vendor's site. The vendor has a firewall in front of the ftps server and I have a firewall in front of my ftps client. I understand that ports 990, 991 ...
4
votes
5answers
3k views

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 ...
1
vote
1answer
1k views

Configure Glassfish http-listener to Port 443/ 80

I want to configure the http-listeners in Glassfish 3.1.2.2 Build 5 under Linux. I changed the settings for the http-listener-1 to the port 80 and the settings for the http-listener-2 to the port 443. ...
1
vote
3answers
3k views

WMI: How can I fix the port?

I need to use WMI for getting some information from my servers. But I have a server in DMZ, so I need to open a port in my firewall. I've searching and I found that WMI uses random port. How can this ...
0
votes
1answer
44 views

How to block every port except specific ones to a user with iptables? [closed]

I'd like to block every port except 80, 443, 1005 to a specific user (owner) with iptables. What command should I use?
1
vote
1answer
31 views

How to restrict access of a process to specific ports?

How can I restrict access of a process to use only specific ports, or block it if it uses non-allowed ports?
0
votes
1answer
33 views

Windows Server 2012, application needs administrative access to open port

How can I grant an application access to listen on one particular port, without running it as Administrator or disabling UAC? Per policy, had to transition from an old server (Windows Server 2003) to ...
0
votes
4answers
1k views

Server not reachable on all TCP ports from all locations

I have a very strange situation on a Linux (CentOS) server. Firstly, from my Ubuntu desktop PC, I can successfully connect to all services that are running on it, on ports 22, 80, 8080 and others. ...
1
vote
3answers
914 views

Windows Server 2008 - unable to bind any TCP port

OS: Win Server 2008 RC2 Windows firewall on (no effect when off) I have suddenly been plagued by an issue in which I cannot find any similar ones with a search. I am running about 20 game servers ...
0
votes
2answers
41 views

Can I configure a server to use a user port(>1023) for NTP?

Can a linux server be configured to use a high source port(above 1023) for NTP synchronization with a Stratum 1/2 server? Are there any disadvantages to doing this?
0
votes
1answer
2k views

Open port 8009/tcp on Fortigate necessary?

A nmap scan of a Fortigate Firewall showed that TCP port 8009 open is. According to knowledge base articles this is only to download the client for ssl vpn. Is this port used for anything else, and if ...
2
votes
4answers
2k views

How can I set Postfix outgoing port to 465, but keep incoming port to default?

My ISP blocks port 25. So, I cannot connect to my server and send emails. I've tried changing it to 465. And it works! However, after this change, I cannot receive emails anymore. # # Postfix master ...
0
votes
0answers
41 views

ACL Rule to Open UDP Ports

I have the current rules in an attempt to open port 5060 and 10000-20000 for my VoIP provider. We are on a Cisco 1921 router. This ACL is applied to the WAN port on the router facing the ISP. Nmap ...
0
votes
1answer
28 views

cobbler managed dnsmasq is not listening on the correct interfaces

I have a cobbler server I am trying to get installed. Unfortunately dnsmasq is not listening on the correct interfaces. It should be listening on my 192.168.10.2 network which is assigned to br1 ...
4
votes
1answer
107 views

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 ...
15
votes
11answers
150k views

How can I find out if a port is opened or not?

I have installed Apache server on my Windows 7 computer. I was able to display the default index.php by typing http://localhost/ in the address line of my browser. However, I am still unable to see ...
0
votes
0answers
11 views

What part of the reboot cycle in Linux is WinSCP detecting as FTP port 21 being available?

When I rebooted one of my boxes running Ubuntu Server LTS 14.04.1 today, I received a strange message from WinSCP during the automated reconnect attempt that I've never seen before: ...
0
votes
0answers
28 views

Ubuntu 14.04 LTS, RDIFF-BACKUP, data source and destination on remote machines

i've got a problem with rdiff-backup... I have three systems: System-A: Data source, SSH on port 1234 System-B: Backupspace, SSH on port 22 System-C: Executive system which runs rdiff-backup. my ...
-2
votes
2answers
45 views

Redirecting to game ports based on subdomain? [closed]

I've been browsing, looking for an answer and there does not seem to be one that works. Here's the situation: I have a web server (running Apache) that I only have access to the files for. It hosts ...
0
votes
1answer
30 views

LDAP communication between two local server

I want to make my LDAP Port accessible inside my private network. Is it possible? Operating System : Ubuntu 14.04 x64 My LDPA Server configuration: eth1 Link encap:Ethernet HWaddr ...
1
vote
3answers
529 views

Server Firewall preventing sending of email [closed]

The firewall on my VPS appears to be preventing my site from sending email. It was working fine until the end of last month. My hosting provider (Webfusion) has been next to useless. I am able to ...
1
vote
2answers
1k views

Plesk - Forward subdomain to another port [closed]

I'm using an ubuntu web server with plesk 11.5.* - I want to forward a subdomain to a nodejs application with the port 2368. On my old debian systems i would create a vhost for ip:2368 and set the ...
0
votes
2answers
110 views

Bind DNS server respond timeout

I've set up a BIND DNS server on centos 7. I've created the master zone record, it is the following: $ttl 38400 loool.ro. IN SOA ns1.loool.ro. owner.yahoo.com. ( 1421842090 ...
0
votes
0answers
41 views

How to prohibit connections on port 25 except from real mail servers - exim, ubuntu

I'm fairly new to email servers, and my VPS has being blacklisted (for the second time) IP Address 45.56.85.76 is listed in the CBL. It appears to be infected with a spam sending trojan, proxy ...
0
votes
1answer
21 views

http requests working on KVM virtual machine, mysql not?

I have an Ubuntu server with KVM virtual machines. I allowed SSH in the firewall so I could access the host. Also I allowed incoming traffic that has state related, established. This is the full ...
6
votes
1answer
304 views

Failed to connect to 127.0.0.1 port 80

I have running nginx server (doesn't matter which server): $ sudo netstat -tulpn | grep 80 tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 4268/nginx tcp6 0 0 :::80 ...
4
votes
3answers
2k views

Prevent port change on redirect in nginx

I currently have nginx setup to serve content through Varnish. Nginx listens on port 8000 and varnish connects users' requests from 80 to 8000. The problem is, on some occasions, particularly when ...
0
votes
0answers
32 views

SharePoint link to Cognos TM1 Server causes 403

We have a strange issue where a direct link from SharePoint to a Cognos TM1 URL causes a 403, however if we refresh or paste-in the link directly it works. The cause might be related to the leading ...
0
votes
0answers
9 views

Ganglia server in Google Cloud

Fairly new to the google platform. I needed to open up port 8649 for a ganglia server environment. When I modified the default network and added the port it shows that tcp:8649 is opened. I'm able to ...
52
votes
2answers
306k views

How to check if a port is blocked on a Windows machine?

On the Windows platform, what native options to I have to check if a port (3306, for example) on my local machine (as in localhost), is being blocked?
23
votes
4answers
138k views

Check if port is open or closed on a Linux server?

How can I check if a port is open or closed on a Linux server?
1
vote
3answers
4k views

How to check a route exist between two hosts for a particular port?

How to check whether there is a route between two hosts for a particular port (e.g. 1433).
0
votes
2answers
284 views

What is the risk of opening network port?

What can someone do if i write a program to open a TCP port and run, lets say an echo server? Can some one access data on my system? or any other risk of opening port?
5
votes
2answers
426 views

Where does a firewall application fit into the software stack?

I'm trying to figure out where a firewall application on a server fits into the software stack, and at what point in the networking process the firewall "kicks in," from the perspective of an ...
1
vote
4answers
4k views

Force close an open port in Windows Server 2003

On a server running Windows Server 2003 I killed the TS-service (specifically the svchost.exe which belongs to terminal services). The service is not running anymore but the server is still listening ...
0
votes
1answer
33 views

Iptables: some ports are closed despite being open by my iptables; can it be something else?

Beginner question. I set up the following iptables rules: #!/bin/sh # Réinitialise les règles sudo iptables -t filter -F sudo iptables -t filter -X # Bloque tout le trafic sudo iptables -t ...