I want to check the internet connection through out my application in following manner:
here is the exactly what you are looking for https://pub.dartlang.org/packages/flutter_offline
Related
I installed insilicoDb, when I give the following order;res<- getDataset("GSE4635", "GPL96")
I receive the following error,
Webservice not accessible. Please check your internet connection
Why
Trying to connect to mongodb atlas but the page keeps loading after i click on connect button.
One thing to consider is to check if your ISP allows connection to the server. I had similar issue and the reason was the port was blocked. It was unblocked after a request.
Turns out I did not have mongoDb installed.
Is there any way to determine which Local Port was used by the Client (C#) to Establish a connection to a SignalR Hub? I have looked at properties of both the HubCallerContext and HubConnection, but it does not seem to be available.
The short answer the question: yes, using netstat or similar you can look at all the connections your client initiated to the SignalR. There you can identify the TCP source port number.
If for some reason you want to get this from inside the application you can either try to find your way via Get underlying tcp connection from HttpWebRequest/Response
or by following this answer.
I set up a VPN on my virtual Server using openswan, xl2tpd and ppp (see this tutorial: https://raymii.org/s/tutorials/IPSEC_L2TP_vpn_with_Ubuntu_14.04.html).
So I am talking about a L2TP/IPSec VPN with a PSK.
The problem I have:
I can connect a smartphone with the VPN using the on-board API.
But after that I cannot connect any more devices to the VPN using a device from the same network (others or cell-networks are working).
For me that means NAT-support isn't enabled but as shown in the tutorial I set the nat_traversal-value in /etc/ipsec.conf to "yes".
Actually, if I connect a windows-computer first, I CAN connect both the computer and one more other device (smartphone), but I am NOT able to connect another device.
I am sure the problem isn't:
- the phone: Sometimes I can connect, sometimes not, as shown above. No installations block anything.
- the router: A connection to the VPN is not impossible.
- the server itself: A connection to the VPN is not impossible.
I see the problem in the configs but I have no clue where to look for these settings.
If someone knows what to do I appreciate every answer.
Thank you.
I found my problem in the config files.
For anyone who has the same problem, add the values to the /etc/ipsec.conf as shown below:
version 2.0
config setup
oe=off
listen=%IP_ADDRESS%
conn L2TP-PSK-NAT
rightsubnet=vhost:%priv
also=L2TP-PSK-noNAT
conn L2TP-PSK-noNAT
rekey=yes
It should work after that c:
I am using strophe.js to intract with xmpp . it has the feature to restore its states when network fluctuate. this work okay for short time but when network got connected after 5 to 10 min fater disconnection it didnt restore its connection. any ideas why this it is so?
You can use connection manager for this. see this one
Basically what you to do is that start a timer when network get disconnected and in that timer check network connection. once network found connected relogin the strophe to make it working.