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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6
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3answers
2k views

Debian - Port 80 is blocked, but I don't know by what

I can't make lighttpd listen to port 80. ~# /etc/init.d/lighttpd start Starting web server: lighttpd2013-03-16 23:15:02: (network.c.379) can't bind to port: 80 Address already in use failed! ...
-1
votes
2answers
23 views

“Connection to host lost” on telnet to port 25 [on hold]

i installed smtp4dev to test receive mails in my localserver(xampp) for the registration form here: https://github.com/panique/php-login note: localserver is on port: 8080 my php.ini file for SMTP ...
0
votes
1answer
908 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 ...
0
votes
2answers
21 views

Remote port forwarding through EC2 not working, though address is in use

I have a remote machine running a server which I'd like access to locally. However, I can only SSH into the machine, not use any other ports. I booted up an Amazon EC2 instances and opened all its ...
1
vote
1answer
20 views

It it safe to forward an ephemeral port to an internal host in a NAT environment?

Short story, I want to expose SSH from a box in a NATed environment to the internet but would prefer to do it on a high (in the ephemeral range) port. Is it safe to port forward an ephemeral port to ...
1
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 ...
0
votes
1answer
38 views

Redirect ssh trafic for one user through another port

Is it possible to have a configuration like this: A server which listen ssh connections on port 22 as usual For one user (let's say git) redirect all the traffic through another port (2222 for ...
0
votes
1answer
19 views

Is netbios required with samba -> win7 and what ports are needed for view/read/write functionality?

Basically I do an IT course at my college (United Kingdom) and obviously with it being a college, they have web filters and a restrictive firewall. To bypass the web blocks and to access my rented ...
22
votes
9answers
50k 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?
2
votes
1answer
235 views

mosh-like port forwarding

This is on linux, connecting to linux servers: I love mosh, but it doesn't support port forwarding, and likely won't for a while since it's been almost a year now and it hasn't happened yet. port ...
0
votes
4answers
958 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
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 ...
0
votes
0answers
26 views

Filtered port 22 with no firewall settings

I'm trying to connect to an sftp server from a CentOS 5.5 server. The connection is never established. When I run the command: nmap -p 22 -P0 <sftp server address> PORT STATE SERVICE ...
0
votes
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 ...
1
vote
1answer
17 views

Can't access ports assigned to Rails 4.2, but 4.04 works fine

I have Ruby 2.1.2 installed and Rails 4.2. Bundle install runs without error. I can do a Rails C without error. Rails s -p3004 launches with webrick or thin without error When I browse to ...
0
votes
0answers
30 views

Server 2012 R2 Telnet

Let me first get the infrastructure out of the way. We have one 2012 R2 Server acting as the Hyper V host for 2 servers. The two virtual machines is one 2012 R2 Server and one 2003 SBS server that we ...
0
votes
0answers
39 views

Windows TCP Port 139 Netbios-ssn vulnerability

I ran netstat -b on my computer. Two results showed that I do not understand, VAIO being another PC on the LAN. [firefox.exe] TCP 192.168.100.106:49186 VAIO:netbios-ssn TIME_WAIT TCP ...
5
votes
1answer
8k views

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 ...
-1
votes
2answers
255 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 ...
0
votes
1answer
133 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 ...
-2
votes
2answers
70 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 ...
-1
votes
1answer
580 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
votes
4answers
49 views

Best Method to test Opened Ports [closed]

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
votes
0answers
40 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
111 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
34 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
26 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
614 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
40 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
45 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 ...
8
votes
9answers
13k 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
51 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
28 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 ...
-2
votes
1answer
52 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
80 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" ...
3
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
votes
4answers
496 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)
-3
votes
3answers
67 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 ...
1
vote
2answers
71 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
40 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
votes
2answers
296 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
91 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: ...
1
vote
0answers
136 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
votes
2answers
19 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
48 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 ...
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
votes
0answers
20 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 ...
1
vote
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" ...