I have setup a lan with a router, with a few computers connected via both wifi and cables. There are also mobile devices connected to the network.
I have a server running on one of the computers. Other computers can access the server via its hostname (http://myserver:8080/), but mobile devices are not able to.
Is there any softwares or any means I can get the mobile devices to access via server hostname too?
You may need to setup a Name Server (DNS probably) on a computer in your local network. This Name Server should be able to resolve hostnames to IPs (e.g. myserver to 10.0.0.21). Configure your mobile devices so that they use this DNS to resolve device names.
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I am developing an app with a login system in flutter. Using postgresql I can access to an external database located in a raspberry. All works perfect until the network of the device changes. So here are my questions:
How can I access to a database from a device connected to a different network? Is that possible?
If not, how could it be the correct way to do it? or what should I read and/or learn to apply this funcionality?
Thank you.
This question is not Postgres specific.
You connect to servers over TCP/IP protocol using servers IP address or it's FQDN, fully qualified domain name. If your device is mobile and changes network, you can use some dynamic IP service or your own name servers.
Setting up a port forwarding system is also possible.
I have an Azure VPN client that I use for connecting to a web server using RDP and to an Azure SQL Server instance using SSMS. The problem is, I cannot connect to both at the same time.
When I go to the Networking properties of the VPN connection, then select the properties of TCP/IPv4, if I select "Use default gateway on remote network", I am able to connect to RDP, but not SQL Server. If "Use default gateway on remote network" is not selected, I am able to connect to SQL Server, but not RDP.
What can I do to be able to connect to both at the same time?
As far as I know. By default, once a successful VPN connection creates, the highest priority entry will be added automatically in the local machine route table. When you select Use default gateway on remote network, data that can not be sent on the local network is forwarded to the dial-up network when you are connected to a local network and a dial-up network simultaneously. The local network prefers to select a VPN connection route. The connection to a local network is disconnected automatically by default. So you could RDP to the web server via the private VPN connection in the dial-up network. You could not access the Azure SQL server since the traffic from the dial-up network is not allowed in the firewall of Azure SQL server firewall. In this scenario, you could check if the outgoing traffic to the Internet from your dial-up network is blocking.
When you un-select Use default gateway on remote network, usually default gateway of the PPP adaptor will be empty. In this scenario, you cannot connect to resources on the remote network because you have disabled the Use Default Gateway on Remote Network setting in the VPN TCP/IP configuration. You could add routes for the desired VPN subnets. Refer to this paragraph Configuring Split Tunnel for Windows
You could use route print on the local machine to check the route entry. Compare the route table in the two situations. More details you could get from this DOC.
It sounds to me like you need to configure a service endpoint on your vnet to allow traffic to route through to your Azure SQL database.
https://learn.microsoft.com/en-us/azure/sql-database/sql-database-vnet-service-endpoint-rule-overview
Try the link above for help configuring it.
I'm setting up an Active Directory in Windows 2012 for user authentication in Windows 10. Server and client PCs are not in the same area, therefore, it is a Wan connection.
For testing purposes, all firewalls are off. Server's public IP is 34.207.231.151 and a has a local IP 172.31.13.53. DNS in the server is active and correctly points the desired domain adir.school1.com to local IP. Client PCs use the server's public IP as DNS, that works well because if I ping adir.school1.com, I get the servers local IP.
If I try to join the clients to the domain it says Cannot contact with an Active Directory Domain Controller in the domain. In the details it says that the DNS was successfully query and it identified a domain controller but it cannot contact the Domain Controller.Which is expected as it cannot connect to 172.31.13.53 outsdie the LAN. How do I configure my ADDS to be reachable outside the LAN?
It looks like about your network configurations. I draw a basic network configuration.
Also you can see a wan network here. Gateway is very important at this point.
In order to use ADDS through WAN, you do need a VPN. I could not use this solution, though, because the admins of the network did not want to open the required ports for VPN overt the firewall.
The solution was to change the network configuration of the entire campus so our virtual server became part of the internal nerwork (which is a bunch of LANs with gateways) and voila!, the ADDS was reachable from all other computers. Still, not accesible outside the campus, but inside it works perfectly.
I have developed an application using sql anywhere database as back end and powerbuilder as front end. it is working on my laptop very well and i have also used this app on network server (without internet ) using wifi on another laptop. in which the program is installed on that other laptop and it connects database stored on my laptop .
now i want to develop a mobile app which should connect to my laptop and use database stored on it. It should connect the database using WIFI network.
i have knowledge of powerbuild simple programing, SQL and Visual basic. but i dont know any thing about mobile app developing.
Please help me to solve my problem.
This shouldn't be too challenging, it sounds like you want the app to connect to a network (or your laptop) database vs. the client machine like any web application and this shouldn't be a challenge other than making sure you've opened up the proper ports for the database in windows firewall AND/OR if you are on the INTERNET you'll probably need to set up port forwarding on your local router so that the database requests to your laptop from the "internet" get forwarded from your router to your local subnet (network).
So for example mySQL uses port 3306 (I think.. memory?) so you'd need a port forward in your router that forwards incoming 3306 requests to your laptop IP address, mac address, or machine name (better to use machine or mac).
HTH
So I have a network setup with a Windows Server 2003 machine running as the Domain Controller. All of the domain users are physically connected over Ethernet except for one which due to it's location requires being connected over our Wifi (which until now hasn't had any domain users). The PC is running Windows XP SP3 and was successfully able to join the domain, but it cannot see any other computers in the domain. Also, when looking in the Active Directory on the server, it also does not show the computer.
I tried unjoining and rejoining the domain but it didn't resolve the issue. I also tried connected the computer over a different AP but again it didn't resolve the issue. After researching online I was only able to come up with information regarding how routers will sometimes interfere with the server's DHCP settings which can cause this issue, but I don't believe this would be relevant as the devices are setup as access points and not routers.
Any ideas?
Not an answer, but a troubleshooting idea. Run 'ipconfig /all' from commandline on this machine and a LAN connected machine and compare. Specifically compare DNS settings, and the IP addresses to make sure they are in the same range.