Normal when a client starts a session with a server. It starts on one port and then the remaining conversation takes place on port assigned it by the server
I don't want to open that big of a port range on my firewall. So is there a way to configure the oracle listener to answer and continue the same port that it started on?
If your firewall supports sql net proxy, you only need to open port 1521.
Related
I have a regular MySQL server running with XAMPP at port 3306 and accessible by my internet ip aswell my local ip (127.0.0.1), the ports are forwarded in my router. An account set up to be accessed from any IP, Everything works fine.
I'm trying to make this same server be accessible by AirVPN DNS address. So I've followed AirVPN instructions to remove the forwarded ports in my router and forward a new port at their VPN with a random number (lets go with 1111) with local port as 3306 and DNS named as xxx.airdns.org
So I open MySQL with XAMPP under port 3306, nothing changed in config file. I run the AirVPN port checker over 1111 and it signals as open. I also try at other sites that checks ports and signals open at xxx.airdns.org:1111
Though when I try to make a connection as usual it returns error (10060): Can't connect to MySQL server on 'xxx.airdns.org' (10060)
Resolutions I've tried:
Switch port values in MySQL config files matching with the ports open in AirVPN
bound address to VPN adapter bind-address="10.6.114.48"
repeated the options above in all different kind of port combinations and addresses
Disabled Firewall on Ethernet adapter of VPN as described here
I couldn't achieve success in this task. I'm looking for some enlightment so I can understand the process.
EDIT:
The connection is set only to TCP protocol. A port check done through airVPN and is registered at XAMPP & FIREWALL logs as accepted connections. Though trying to connect from a client I got no log from Xampp or Firewall, it gets timed out.
Sorry for "answer" type not just comment, but i dont have enough reputation here :)
Maybe the protocol ( TCP/UDP ) is your issue.
If you use UDP on your airVPN better check forwarding on your router - most of them
by default sets TCP only. Otherwise maybe change to TCP on your airVPN.
ISP provider often filter this protocol.
Issue: Consider that you can't connect to a service running "behind" some VPN server from a machine that's connected to that very same VPN service.
Solution: Connect from another machine to test your service properly.
I want to make multiplayer game, and I want it to use UDP sockets. Because of that, I want to use DatagramSocket. The problem is that DatagramSocket needs to be bound to a port on both sides. Is there a way to create a server - client program with UDP that does not need the client to portforward? (Like Serversocket and Socket).
Remember that UDP is connectionless. You send a packet of data to some IP address and hope it knows what to do with it once it gets to the targeted machine. But actually once it's on the machine it has no idea where to go from there, is there an application that's interested in these packets? And this is precisely why you need to specify a port number that is registered to forward packets to specific application on the machine.
Send a packet to myself to the application running on port 7000: 127.0.0.1 : 7000
I have a VB.NET application that can connect to the SQL Server through LAN base, but how can I connect to it through internet, the application need to use outside, I know i need to use the public IP instead of using the IP address of the server but my public IP address that I've set in connection string can't connect to the server, Here's my connection string
Dim connstr$ = "Server=xxx.xx.xx.xxx\SQLEXPRESS,xxxx;Initial Catalog=sample_db;Integrated Security=True
Public conn As New SqlConnection(connstr)
I've try also to set the port and change the firewall restriction,enabled the TCP etc. and search a lot here but still doesn't work
Here's our network setup
PC-->router-->internet modem
1433 is the default sql server communication port. Port 1433 should be forwarded to the local IP address where your sql server runs.
1) Make sure that port 1433 is the valid communication port for sql server. You can check it from sql server configuration tools. Use actual port number rather than 1443 if it was changed by someone.
2) Find NAT (Network address translation) menu in your modem or router administration panel.
3) Forward port 1433 to your server's local IP address
4) Restart device
As a note that, your modem does not require a static IP. Your device most probably might have a new IP address after every restart. But it would be valid until you restart it once more. You can use this IP address in order to access your database remotely. It would be better but you don't have to get a static IP address.
UPDATE: You should also be sure that, port is not blocked by a program on the server such as a virus or security program.
Good luck
Google "port forwarding", which is also called Network address translation or "NAT".
The other answers are perfect but searching for the term on google should get you an idea on what it is, and how to go about it. Add your router name to the search for exact steps.
In short forward the port that SQL Server is listening on, from the router to the server machine. You will need to do some configuration on the router for that by opening the admin page. For how and details, Google "port forwarding"
Hello my name is Ozan Bayrak
I have SQL on my pc and I have made a C# application.
I published the C# and installed another SQL server into this computer so I have 2 SQL
and now I can't Log in into my SQL cuz I get a error it says like this
"You can't run this Sql on 2005 and 2008"
who can help me please I really need to know this.
Everytime I want to log in it gives me a error.
when I go to services the SQLEXPRESS is offline too.
Thanks for the help
Ozan Bayrak
There's many possible issues here, including all or one of the below
Test Open Port The network on your LAN, can you ping SQL Server remotely on the default port 1433 on the specific IP Address (you can use PuTTY or Telnet to check this)
SQL Configuration Manager Check SQL Configuration Manager and see if the Network Protocol for SQL is enabled for TCP/IP, Named Pipes or Shared Memory
Firewall and Default Port Check the Windows Firewall make sure its allowing 1433. Since you are testing, best thing to do is to disable the Firewall in Windows Services to confirm whether its a firewall issue or not.
SQL Server Browser SQL Server Instances (instances have the form SERVER\SQLEXPRESS or SERVERNAME\SQL1 for example). Check in services and makes sure the "SQL Server Browser" is running. Also, you must allow a Firewall rule for port 1434, which is the default port of the "SQL Server Browser". This is necessary because the SQL Server maps and forwards the traffic based on the Instance Name, so this is the service that resolves the instance name.
SQL Server Instance Port Varies SQL Server Instances does not necessarily run on port 1433, in this case you will have to have the SQL Browser Running which maps the name to the port and directs traffic to the correct instance. In your firewall, instead of allowing port 1433, you will have to allow sqlservr.exe Executeable Program. The port also can be determined by looking at the SQL Server log File in the MSSQL\LOG folder in Program Files. There will be an entry for "Server is listening on port ..."
My recommendation for you is to install SQL Server Express Management Studio (SSMS) which is the GUI interface to manage the SQL Server Express instance. The link is below for both SQL Express and SQL Management Studio. And see if you can connect to the servers that way first. Another suggestion is for you to install both on a Local Computer and simply familarize yourself with SQL Server first before exposing it on the Network.
http://www.microsoft.com/en-us/download/details.aspx?id=29062
Since you have both, its possible that ports are conflicting thereby the SQLEXPRESS instance for MSSQL 2005 isnt starting up. Change the port number with the following steps
In SQL Configuration Manager, in the left side window under SQL Server Network Configuration select Protocols for SQLEXPRESS.
On the right side window, Right Click on TCP/IP and select Properties. In protocol tab, change Enabled to Yes
Under IP Address tab, search among IP1, IP2, IP3 and IP4 which has Enabled as Yes(if neither is enabled, just enabled one)
Which ever has Enabled as Yes, make sure TCP Dynamic Ports is blank and change the TCP port to anything other than 1433.
Also under IPAll, make TCP Dynamic Ports blank and for TCP port enter the same value that you entered above.
Click Apply and close the TCP/IP Properties window.
Now go back to SQL Configuration Manager, under SQL Server Services, right click on SQL Server(SQLEXPRESS) and click Start.
Try the following:
Turn on the SQLEXPRESS service and try to reconnect.
If the above fails, then read this article.
In a nutshell, you will do the following:
Enable remote connections on the instance of SQL Server that you
want to connect to from a remote computer.
Turn on the SQL Server
Browser service.
Configure the firewall to allow network traffic
that is related to SQL Server and to the SQL Server Browser service.
In case of not turning the Firewall off:
after pinging the IP the Request time out will appears,
but after turning off the firewall it will reply.
Why?
I am using Mysql with Java, the question not related with java but maybe java programmers get something like this issues with sharing the database.
Your firewall will block access to port 3306 (default port for MySQL). To get it to work without turning the firewall off, you will have to configure the firewall to let connections to port 3306 (other whatever port is configured in your my.cnf) through.