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there,
Which application uses port 6443 and for what? I want this information because when I use the command nmap with mi ip, there is a line that puts "6443 sun-sr-https". Is it something about oracle? sr means "server"?
And in other port, in 9090, I have "zeus-admin". I read about it in some places and in there they said that it is some kind of malware. Is it correct? Thanks for your answers.
kube-apiserver which is one of Kubernetes components uses port 6443 too.
The service name sun-sr-https is the name of the Oracle Service Registry which (according to this) uses the 6443 port for HTTPS over SSL connections as an alternative to the default well-known port 443 so as not to cause conflicts with the default Application Server domain.
Many applications use the 6443 port as an alternative to the default one, for example, the Kubernetes API. Applications can use those ports without superuser permissions.
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I have a dlink router..Dlink DIR 600M...I am trying to port forward 1337 and 1334 through my router and opened listener but after enable i checked canyouseeme.org but theres no port opened..i have a cable net connection...my wan ip and public ip is different.
If your WAN IP address and your Public IP addresses are different, you will need to be sure that you first port forward from the public-facing router to your D-Link router. If you do not have access to your public facing router (as is the case with my current network setup), then this port forwarding is not possible.
I have a DIR-651, and there are check boxes next to all the Port Forwarding rules. Make sure those are checked. I've wasted hours of troubleshooting because one of the boxes wasn't checked and saved.
Finally, make sure that you have a server running on the correct IP address and port that you specified on your router. Also, make sure that your firewall is disabled on those ports. If your server isn't configured to respond on those ports, then canyouseeme.org will not respond that those ports are open.
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How can I add a port to 127.0.0.1? I have 127.0.0.1:5984 open but want to open another one. Any idea? As A head's up I'm new to computers. I'm on a Mac running OS X Mavericks. I'm also on Xfinity.
Edit: I am having a port conflict while attempting to use CouchDB, how can I resolve this?
A port is a listener for a specific protocol such as tcp or udp. In order to open a port. You need a program or service to listen on that port. For example, by default Skype will listen on port 80.
Please read the wikipedia page for a basic overview or what a port is.
In computer networking, a port is an application-specific or
process-specific software construct serving as a communications
endpoint in a computer's host operating system. A port is associated
with an IP address of the host, as well as the type of protocol used
for communication.
http://en.wikipedia.org/wiki/TCP_Port
Edit: To answer actual question:
Unavailable Port
Problem
$ couchdb Apache CouchDB 0.9.0a747640 (LogLevel=info) is
starting. Failure to start Mochiweb: eaddrinuse {"init terminating in
do_boot",{{badmatch,{error,shutdown}},[{couch_server_sup,start_server,1},{erl_eval,do_apply,5},{erl_eval,exprs,5},{init,start_it,1},{init,start_em,1}]}}
Solution
Edit your /etc/couchdb/couch.ini file and change the Port setting to
an available port.
Excerpt from:
http://wiki.apache.org/couchdb/Error_messages
You can change the port CouchDB listens on by editing its local.ini file (which is in /usr/local/etc/couchdb by default). Under the httpd section, uncomment the port entry and change its value to the port you want to listen on (5983 in your example).
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Is it possible to block a ip address and website using powershell in windows 7 ?
Hosts file is not an option for me as I want to block IP address so that windows cant connect to that website.
Thanks.
I do not think that is possible, but I know you can use the firewall in Windows 7 to block outgoing connections to an IP address. Create an outgoing rule (I think the Port type will work) and once completed go to properties and on the Scope tab enter the remove IP address that you want blocked. The Action must be set to "Block the connection".
You can block for all ports or selected list of ports. For eample, you can block port 80 for HTTP traffic while still allowing other traffic to pass.
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Why is 22 the default port number for SFTP? Is there any specific reason for this?
It's the default SSH port and SFTP is usually carried over an SSH tunnel.
Why is 21 the default port for FTP? Or 80 the default for HTTP? It is a convention.
From Wikipedia:
Applications implementing common
services often use specifically
reserved, well-known port numbers for
receiving service requests from client
hosts. This process is known as
listening and involves the receipt of
a request on the well-known port and
reestablishing one-to-one
server-client communications on
another private port, so that other
clients may also contact the
well-known service port. The
well-known ports are defined by
convention overseen by the Internet
Assigned Numbers Authority (IANA).
Source
So as others mentioned, it's a convention.
Not authoritative, but interesting: 21 is FTP, 23 is telnet. 22 is SSH...something in between (that can take the place of both).
Ahem, because 22 is the port number for ssh and has been for ages?
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I'm new to managing EC2 instances. I have created one, and I can run it and remotely login with Windows Remote Desktop. I can ping external servers from inside my instance, but I cannot ping the instance from my machine using its DNS public name.
I guess I'm doing something wrong with security groups.
Any thoughts anybody?
To ping an EC2 instance, you need to allow ICMP traffic in the instance's security group.
As far as I am aware, Amazon is blocking ICMP (ping) requests. If you want to perform some sort of "is it up" request you may want to implement some other routine like a web based "ping" page; just have it display the time when you hit it.