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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Multiple Ports Forwards, Most Working, but Not All?

So I have this ASA5505 setup and pretty much everything works, except a couple key port forwards. Can anybody spot ANY reason why SOME port forwarding would not work? Specifically I know the 50000 ...
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2answers
47 views

Why adding some port to IP address redirect to another IP? [closed]

I have a ubuntu server inside a router. And I have setup a DDNS (for example, example.com is the domain name) to point to my dynamic IP. The port 22 is forwarding to port 22 of ubuntu server, configed ...
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2answers
520 views

Can I run two server applications on port 80?

I am currently running nginx on port 80, with the configured server names as example.com and www.example.com. I also have a Flask application that I would like to have accessible through port 80, but ...
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1answer
62 views

SFTP source port used by client

What port is used by a client when connecting to SFTP server listening on port 22? In which range can be that port? Does that range depend on client application used, or it depends on operating ...
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201 views

Re-routing incoming network traffic from sub-domain to specific port on Windows 2008

I'll do my best to explain this. I've got a Windows 2008 server with TWO local intranet-sites running on it. The first website will open if you just type in the name of the IP address - ...
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1answer
109 views

Firewall connected to a switch using 2 ports (LAN & DMZ), but switch management talks on DMZ port

Someone let me know if I'm off track here. I'm setting up a firewall with 3 ports configured (WAN, LAN, and DMZ). The LAN and DMZ ports both connect to the same switch, on which I will configure a ...
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1answer
39 views

How to alias a range of ports to a specific port

I have a service running at port 3000, how can I forward ports [12000 to 14000] (2000 total ports) to the port 3000 with one command. I don't prefer to manually add each port though. Any ideas?
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1answer
52 views

Do ports need to be opened on Hyper-V server for Virtual Server to communicate over those ports?

I have had some issues with moving quickbooks to one of our virtual machines. Is it necessary for me to open the same ports required by that application on the physical server, which is hosting ...
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2answers
863 views

ubuntu: open udp port 123

into my linux server (Ubuntu 8) I have top open the port 123 for ntp. I have write this into /etc/iptables.rules: :INPUT ACCEPT [7496:9080183] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [4393:322232] [0:0] ...
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0answers
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How to reverse proxy specific ports to a different server behind a firewall using Apache mod_proxy

I have two Web severs, one Apache 2 and the other IIS 8, and both are on a LAN behind a firewall. I have ports 80, 443, and 8080-8088 open on the firewall. I have an externally hosted DNS A record ...
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1answer
73 views

Apache / Tomcat port information

I have few questions regarding the Apache HTTPD server and the Tomcat web server port configurations. Through netstat and TOMCAT/conf/server.xml I understand that: 80 and 443 ports are used by ...
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2answers
64 views

SSL on another PORT

We have a web server that can handle SSL requests, but on port 445 instead of 443. So https://domain.com doesn't work, but https://domain.com:445 does. How can I use .htaccess to issue a redirect to ...
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2answers
444 views

How can I make Jenkins inaccessible to the outside world?

On a development server, I have installed the tool Jenkins for automated testing. This runs on port 8080. If I go to www.mysite.com:8080 I can see the command panel for this. I want to make this ...
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1answer
1k views

Squid Proxy server (not transparent) working on port 3128 and 80

I have a Squid Proxy server (Debian) working perfectly with authentication: auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd I'd like that also client that try to get web pages ...
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0answers
72 views

forward a specific port from linux server (ubuntu) through firewall server (ubuntu)

I'm doing the following: % autossh -i YYY.pem XXX@SERVER -N -R 90:localhost:9000 -o ServerAliveInterval=30 to forward a server port from the local machine to the public machine. But connections ...
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1answer
242 views

Port 25 blocked but Firewall is off [duplicate]

OK so this is driving me crazy. Running sendmail on CentOS. It's running, and listening on 25: [root@mysqlslavebackup ~]# nmap -sS -O -sV 127.0.0.1 Starting Nmap 4.11 ( ...
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0answers
225 views

Static Public IP OpenVPN Client Needs to Accept Incoming Connections on His Public IP

I love serverfault, I have learned quite a bit from this website. Hopefully I can learn one more thing. OpenVPN Server has 30 Static WAN IP's each one has 1 user on it. Plus there is a main IP ...
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1answer
31 views

Can a firewall partially block a package?

We have just recently been doing an extensive testing of a certain in-house program (called SPARE) for handling spareparts. The idea is quite simple. Each node has a database on a server and through a ...
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3answers
1k 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! ...
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1answer
39 views

Need apache to proxy subdirectory to another service

I have a website running on Apache, at 192.168.1.90:80 for xxxxxxxxx.com I also have a reddit instance running at 192.168.1.90:8001 for reddit.local I have been trying to proxy the url ...
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1answer
369 views

Porting Nginx proxy to apache virtualhost

I installed Gitlab on my server which was using Nginx at the time, but we have since switched to Apache2, and I cannot seem to get mywebsite.com:3000 to refer to /home/gitlab/gitlab/public as it did, ...
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1answer
72 views

Port disconnection on Netgear GSM7328Sv2

I have a GSM7328Sv2 cascaded with some GS724TS (unstacked) and two tagged VLANs. The switch works fine, but sometimes it disables itself a cascaded port (almost always the same port), without ...
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1answer
88 views

Is port 8080 safe for IIS Management Service [closed]

Following Configuring Remote Administration and Feature Delegation in IIS 7, I configured the IIS Management Service to use port 8080 instead of the default 8172. Is this safe? Could there be ...
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1answer
322 views

iptables forwarding port to internal IP

I'm using OpenVPN on a VPS which I want to forward incoming port 7999 from the external IP 198.23.248.150 to the internal IP 10.1.10.2 using iptables. I cannot seem to get the syntax correct and I ...
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1answer
131 views

how to make my Linux to listen on his public ip rather than the private IP

I have a virtual machine on some public cloud. the physical IP is not routeble. the ISP provided for me with a public IP and the NAT is being done using the ISP FW. on that Server I'm running ...
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1answer
58 views

Can a FTP server use control port other than 21 (default control port)?

Can a ftp server listen on any other port than 21 (default control port to which any FTP client initiates the connection to)? If yes, how does the client know on which port it has to initiate the ...
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2answers
640 views

Connection Refused Error Java/Linux

I'm trying to move an existing project over to a new (linux) server environment (note, I have no direct access to the code nor do I have any knowledge about the project in general - talk about a great ...
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1answer
180 views

Could not open port for activeMQ broker on CentOS

Here is my problem: We have a virtual machine on VMware ESXi with CentOS 6.3 system (devserver). We use port forwarding to access ports on the virtual machine. We deploy our application in tomcat on ...
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1answer
155 views

Unable to access NTPD server except on loopback address Centos 6

I can only get results from: ntpq -p localhost or ntpq -p 127.0.0.1 If, from the same server, I try it as either the external IP address or domain name then it times out with no response. ntpq -p ...
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1answer
53 views

set specific port on all incoming mssql requests

I connect from my LAMP server to another MSSQL server (through php) at 1433. But all incoming activity from that connection is coming to random ports on my server and because of that I cannot start my ...
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1answer
70 views

How to configure iptables for must open ports? [closed]

In my machine there are 2 ws (web services) which can be accessed from any PC connected to in the same network (wifi for example) .. so i have to install iptables on the machine to prevent any call ...
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1answer
150 views

100 Mb/s port limit reached or something else?

I have a dedicated server with a 100 Mbps port. A few times a week, there comes a time (usually in the evening hours) when there is an extremely high bandwidth usage, by far more than usual. I am on ...
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Java BindExceptions in delayed stop/start conditions

I have a script that will automatically stop a server and restart it on the same port/ip address. I've noticed that some mornings the server doesn't restart successfully because it gets Java ...
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1answer
131 views

Running an email server on a VPN client, wanting traffic passed through for smtp, pop3,imap etc from vpn server.

I have a home broadband network which I also run an email server. As my provider won't give me a fixed ip address, and most servers refuse to accept smtp mail from dynamic ip ranges, I felt the simple ...
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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 ...
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1answer
242 views

ProxyChains is redirecting packets destined to local machine to the proxy server

I am using ProxyChains to connect to my proxy at college. It works very fine except that it even redirects packets meant for a local port to the proxy server : ...
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2answers
227 views

Is there a way to tell a device name (computer name) which connects to the internet jack from a wall without accessing the switch to find out?

I'm not familiar with networking and have been trying to search for info online. From what I have found, there's no possible way to find out the particular physical port of a switch that a computer is ...
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5answers
1k views

When would I open Port 53 for DNS?

Locking down an application server. The server hosts a web app that is served via http. There are a few other ports open as well. Port 53 is open for DNS. Why would I need this? Extra: (Do not ...
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4answers
49 views

Mongo security users & ports

As long as my mongo port is not accessible to the outside world and only available locally, can I go about without securing my database with a username and password?
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2answers
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Domain that redirect to a port

I've got two domains that are connected to one server (same IP). I want to domain1.example.com redirect to 1.2.3.4:12345 and domain2.example.com redirect to 1.2.3.4:12346. How can I do that? I can't ...
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Am I using the correct custom security service?

I have a documentation system that needs to send user updates regularily to users that do not sit on the same network. The network that the documentation system resides is up until now a closed one. I ...
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2answers
147 views

can not access portal after specifying port in URL

Django webservices is running on port 8000 (pyhon manage.py runserver 0.0.0.0:8000) I am able to access using , https://ec2-72-44-51-113.compute-1.amazonaws.com/admin/ but if I specify port in url, ...
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1answer
812 views

how to solve the error: “ssh_exchange_identification: connection closed by remote host”

I have been researching for hours and still unable to solve my problem. This error "ssh_exchange_identification: Connection closed by remote host" has many proposed solutions but none seem to solve ...
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1answer
291 views

Enable alternative FTP port on Windows Server 2008 R2

I have Windows Server 2008 R2 installed and using XLight FTP Server. I need to use 2221 port as FTP. I've created rules in FireWall, also run commands: netsh advfirewall firewall add rule name="FTP ...
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166 views

tell tcpdump to not include the port numbers in the output

how can tell tcpdump to not include the port numbers in the output? Right now it includes the resolved IP + resolved port. I just need the resolved IP address (hostnames)
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1answer
258 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 ...
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1answer
123 views

opening firewall 1433 port to IP address that require a direct connection

We are upgrading from sql server 2005 to sql server 2008 and windows server 2008 R2. New server is behind a firewall, we have 30 or so windows XP machines, that will require the port 1433 to be ...
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1answer
329 views

How to add port exception range via group policy

I am currently working in a Windows Server 2003 environment. We've recently picked up Spiceworks and are having some issues getting all of the machines on our network scanned properly. So far it seems ...
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apache2 connection hangs

I'm kinda new to Apache2 and all the server stuff and I am facing a strange problem I have set up a reverse proxy in apache.config, so that all the calls with /api/ will be forwarded to port 8015 ...
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1answer
68 views

Can a SVN Server run on Port 81?

I have a IIS installed server and I installed SVN on the same server. I noticed that IIS occupied port 80. I change the port of the SVN service to 81. I just wondered if it's acceptable to change to ...