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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1answer
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Declaring multiple ports for the same VirtualHosts

Declare multiple ports for the same VirtualHosts: SSLStrictSNIVHostCheck off # Apache setup which will listen for and accept SSL connections on port 443. Listen 443 # Listen for virtual host requests ...
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votes
2answers
249 views

how can a server handle lots of port 80 connections

Admittedly this is a simple question but 20 minutes of googling and I just can't find an answer... I will frame my question with an example. say I own www.reallypopular.com and my website sees 100 ...
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0answers
25 views

Is it possible to redirect all port 53 traffic? [on hold]

We want to redirect all port 53 traffic to our DNS server using a "Raspberry Pi" acting as a switch. Is this something that is possible/realistic? (All DNS traffic, including applications that try to ...
0
votes
1answer
108 views

Trouble with port 80 nating (XenServer to WebServer VM)

I have a rent server running XenServer 6.2 I only have 1 public IP so i did some NAT to redirect ports 22 and 80 to my WebServer VM. I have a problem with the port 80 redirection. When i use this ...
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votes
2answers
63 views

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

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 ...
-6
votes
1answer
19 views

How to serve a file over a specific port? [on hold]

On this page is states that Adobe Flash Player checks port 843 for a socket policy file. However, what I'm wondering is, how can I serve my own file over port 843 on my VPS? ...
-1
votes
1answer
567 views

Forward localhost memcached server on port 12111 to domain.com memcached server

My customers are running many scripts that uses memcached, but all of them are using localhost as a address. My localhost server is now out of RAM, because it's doing many other things like WWW and ...
2
votes
3answers
1k views

How to enable Jetty to support cometd/reverse ajax while let it listen to port 80?

I would like to use cometd / reverse ajax capability of Jetty 7. I tried to configure it so it listen to port 80, instead of 8080. However, according to ...
0
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4answers
44 views

Best Method to test Opened Ports [on hold]

We have a requirment where in we have to test 500+ Port opening rules. So requires a suggest on below points. Which is the best tool to test the connectivity of the ports. Telnet will be sufficient ...
0
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0answers
25 views

Monitor traffic on ports with Cacti

This seems like a basic question, but i haven't found any solution yet. Recently I've installed Cacti for interface traffic monitoring. That works fine, but I would like to see these graphs for used ...
0
votes
1answer
94 views

Can't connect to remote server. Socket error = #2000

I don't know what went wrong, but I get a Timeout after logging in to the proftpd server. STATUS:> [12.05.2014 16:30:24] Getting listing ""... STATUS:> [12.05.2014 16:30:24] Resolving ...
0
votes
1answer
31 views

cannot send emails to other Web servers

I'm trying to limit my server's open ports in CSF. The IPv4 port settings include: # Allow incoming TCP ports TCP_IN = "22,25,53,80,110,143,443,587,3654,53343” # Allow outgoing TCP ports TCP_OUT = ...
0
votes
1answer
23 views

Amazon Security Groups: Change Inbound SSH Port

How can I change the Inbound SSH Port on my Amazon Security Group? When adding a new rule for SSH, the Port defaults to 22 and cannot be edited. Is this possible? Please note: This question is ...
0
votes
1answer
601 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 ...
1
vote
2answers
27 views

Haproxy backend servers on different interfaces

I have a haproxy server which gets limited to some 60k connections. I think it is because of ephemeral port limit as I have 1:1 connection mapping, so all my outgoing connections go to the same ...
0
votes
1answer
41 views

Run sshd on multiple ports but different domains [duplicate]

I want to run my sshd server on multiple ports but different domains. The server should be reachable as following: ssh -p 12345 example.com ssh -p 22 git.example.com I tried to modify ...
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9answers
12k views

How to find the number of open ports in linux?

How to find the number of open ports in linux? I want to see if I am running out of ports. Also, how do I see the limit of my OS?
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0answers
47 views

Nginx multiple IPv6 ssl

I'm running several websites with Nginx 1.6.1. Now I want to make them accessible over IPv6. Normal HTTP is working but with ssl I have problems. Site1 server { listen xxx.xxx.xxx.1:80; ...
0
votes
1answer
27 views

Is port 21 active?

I have recently installed sftp (secure shell ftp) into proftpd. Knowing that the default port for sftp is 22, I have also changed the port value from 23 to 22 in /etc/proftpd.sftp.conf. So I expect it ...
0
votes
1answer
866 views

Windows server - run nginx on port 80

Is there any way to get nginx running on port 80 on a windows 2003 server? It seems that the http.sys service is running on port 80 which is the new "preferred way" for a web server to run on windows ...
-2
votes
1answer
43 views

Hiding services from port scan

Upon running a port scan on my server: 22/tcp open ssh (protocol 2.0) 80/tcp open http nginx 1.4.6 (Ubuntu) 443/tcp open http nginx 1.4.6 (Ubuntu) 3000/tcp open ppp? 3001/tcp open ...
0
votes
1answer
70 views

How do I block all access to machine except port 3389 using Open vSwitch

I can allow access to the machine and block everything else using: ovs-ofctl add-flow xenbr0 "dl_src={mac-address} priority=39000 dl_type=0x0800 nw_dst={ip-address} idle_timeout=65000 action=normal" ...
2
votes
4answers
6k views

nmap on my webserver shows TCP ports 554 and 7070 open

I have a webserver that hosts various websites for me. The two services that are accessible outside are SSH and Apache2. These are running on a non-standard and standard port, respectively. All other ...
1
vote
1answer
355 views

Reserving Ports on Windows Vista?

Is there a way to reserve a range of ports on windows vista? On windows XP and 2003 there was a registry key for that (http://support.microsoft.com/kb/812873), does anyone know of a method to do so ...
3
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4answers
475 views

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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votes
3answers
65 views

SSH on linux | CentOS [closed]

I have a Linux server using CentOS. I have changed the SSH config to make it a little more secure, First I changed the from from default 21 (or 22?) to 34786. This way if someone tries to hack in at ...
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2answers
68 views

How to get the port number a user ssh'd in on?

I am transitioning servers away from port 22 in an existing multiuser environment. I have configured sshd to listen on two ports: 22 and the new port. Now I would like to detect when a user connects ...
-1
votes
1answer
38 views

What is the difference between an accelerated LAN port and a regular non-accelerated port? [closed]

Can someone explain the difference for me? Wondering more about the difference for the end user, but a technical description would also be helpful.
0
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2answers
294 views

Countermeasures versus incoming DNS reflection attack

i am currently experiencing a DNS reflection attack towards my server. I am getting a massive amount of answers via UDP from Port 53 that my server has never asked for: 02:53:57.626156 IP (tos ...
-1
votes
1answer
64 views

Can't access apache by port 80 from external

I followed a lot of solutions I found, but it still doesn't work. I can access the server by port 80 inside my network, bui I can't on another one, just by another port (like 62, as I set). Files: ...
0
votes
4answers
1k views

connections on port 80 suddenly refused / server not responding

my dedicated server stopped responding to requests on port 80 today out of sudden, i havent touched anything in more than a month. its ubuntu 10, varnish + nginx + php-fpm, only 1 website. load is ...
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0answers
116 views

Trying to change a custom VPN port back to the original on Fortigate 40C

We recently changed our firewall and bought a Fortigate 40C device. We wanted to use our old VPN settings. The Fortigate support technician told us that this model was new and he didn't know it in ...
0
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4answers
937 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. ...
0
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1answer
1k 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 ...
0
votes
2answers
18 views

How to append mysql access to iptables

On one of my servers, I can see this: ACCEPT tcp -- distinct_server_ip anywhere tcp dpt:mysql By doing sudo iptables -L | grep distinct_server_ip And with ...
-1
votes
2answers
46 views

Get domains accessed through a specific port [closed]

I'm developing a product and at a certain point I need to get domain names used to access some service on a specific port. Let's suppose I've a computers network with Internet access through a Linux ...
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vote
3answers
2k views

WMI: How can I fixe 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 ...
4
votes
3answers
9k views

How to disable System service from listening on port 80 in Windows Server 2003

I'm trying to install a service on a Windows Server 2003 machine which is supposed to listen on port 80 but it fails to start because some other service is already listening on that port. So far I've ...
0
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0answers
16 views

Can Azure load balancing, balance to several ports on one (or more) VMs

I have a single threaded application (on an Azure VM), which I want to run one instance per cpu core. I will need to use one port per instance. (e.g., ports: 81,82,83, and 84) Is it possible to load ...
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4answers
2k views

changing the default port no of tomcat in ubuntu

Hi all I'm trying to change the port number of my Tomcat server installed on Ubuntu. For this I have changed the file server.xml and made the following changes: <Connector port="8081" ...
8
votes
6answers
5k views

netstat shows a listening port with no pid but lsof does not

This question is similar to Network port open, but no process attached? I've tried everything from there, reviewed the logs, etc... and can't find anything. My netstat shows a TCP listening port and ...
1
vote
1answer
95 views

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 ...
0
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0answers
65 views

Daloradius / Freeradius mac authentication

I setup a centos freeradius mysql with the frontend daloradius using the steps on this site http://linuxdrops.com/install-freeradius-with-web-based-management-daloradius-on-centosrhel-debian-ubuntu/ ...
1
vote
0answers
47 views

Man-in-the-middle attack at Starbucks [closed]

I'm using Charles to sniff out the traffic on my iPhone at Starbucks and for some reason it won't work with at&t wifi. Google Starbucks wifi does, however. I use my iPhone to connect to the same ...
1
vote
1answer
831 views

Windows Server 2008 constantly spamming external IP's on outbound TCP port 445

I have a Windows Server 2008 box running as a Domain Controller. I have noticed in my Cisco ASA firewall logs that this box is continuously sending out (like a thousand requests a second) requests on ...
0
votes
1answer
44 views

How to ensure Netgear GS724TP is not blocking Dropbox Lan Sync - port 17500

We're a small company using Drop Box for business but have noticed that Lan Sync refuses to work on our network (it works fine at home). After trouble shooting the issues on the Dropbox forums, it's ...
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votes
1answer
65 views

How to close port 8080 from all except ip 127.0.0.1

I am on Centos 6 with Nginx on port 80 and Apache2 behind him on port 8080. I've written an anti DDOS script which works fine when ip access port 80, but if attacker directly spams port 8080 ...
12
votes
9answers
108k views

Disable TeamViewer from “stealing” Port 80?

How can you disable TeamViewer from using/reserving port 80? I am certain in the previous version <v4.1.6 there used to be a radio button option in "options" which disabled it from needing it, but ...
-1
votes
1answer
170 views

Opening port 587 on Debian running on Google Compute Engine

I'm attempting to use port 587 for my server mailing purposes. However, I can't seem to be able to unblock the port even after trying the following : Adding port 587 to the Google Cloud network ...
0
votes
2answers
50 views

CentOS - Allow FTP access through IPtables

Sorry guys for the stupid question, but I can't open my FTP (ProFTPd) from browser on CentOS 6.5. When I stop IPtables I don't have problem, but when is running I have. Port 21 is open, port 20 is ...