I have a problem with my Bgp configuration. I want to configure a iBGP Connection between router and VPNhub, but the connection inbetween failed. It sends messages but can't receive and it doesn't build routes.
it recognized it as iBGP connection, it's just the peering problem.
Related
I am looking for the answer: how can I auto disconnect connection of VPN Client after specific idle time or specific connection duration?
There are many clients connected to my OpenVPN server but they forgot to disconnect VPN client or they connect for a long time but do nothing.
I am using OpenVPN Access Server v2.4.12
I have created a .net core 3.1 console application for reading azure service bus queue messages and deployed the EXE in a client on-premise VM. It was working initially but now it is not working from VM (now also working from local machine). I am getting a time-out (socket exception) while executing the exe in on-premise VM. I am using shared access policy connection strung to connect the service bus.
Exception :
Azure.Messaging.ServiceBus.ServiceBusException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. ErrorCode: TimedOut (ServiceCommunicationProblem)
---> System.Net.Sockets.SocketException (10060): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.
at Microsoft.Azure.Amqp.Transport.TransportStream.EndRead(IAsyncResult asyncResult)
at Microsoft.Azure.Amqp.Transport.TransportStream.<>c__DisplayClass22_0.b__1(IAsyncResult a)
at System.Threading.Tasks.TaskFactory1.FromAsyncCoreLogic(IAsyncResult iar, Func2 endFunction, Action1 endAction, Task1 promise, Boolean requiresSynchronization)
The most common connection issue in an enterprise environment is that the ports needed for AMQP over TCP (5671/5672) are not open. Changing the transport to AMQP over WebSockets often helps, as it will use port 443 and may be routed through a proxy, if needed.
Both the transport and the proxy (if needed) can be specified using the ServiceBusClientOptions when creating your client:
var options = new ServiceBusClientOptions
(
TransportType = ServiceBusTransportType.AmqpWebSockets,
WebProxy = new WebProxy("https://proxyserver:80", true)
};
var client = new ServiceBusClient("<< CONNECTION STRING >>", options);
For more information, you may want to look at the Service Bus troubleshooting guide.
I am using Windows 10 with IIS 10.0
I am publishing website on IIS and I need to reach it with public ip.
What I did;
* Port forwarding through router
* Adding DMZ with my local IP
* Turning off firewall
* Adding port to firewall inbound rules with allow edge traversal
I can connect with internal IP like 192.168.1.75:81
I get "System.Net.Sockets.SocketException A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond from [MYPUBLICIP]" when I try to reach it like MYPUBLICIP:81
What are the possible scenarios that blocks to port?
Thanks.
As far as I know, the error message means there is no server listening at specified ip/port that you are trying to connect to.
In my opinion, you should firstly make sure your client machine could access your server by using this MYPUBLICIP address.
Then I suggest you could try to make sure the port 81 is your IIS web application port.
Besides, I suggest you could try to open your event viewer to find out the details error message.
Actually i am using rabbit mq server and mosquitto mqtt client for the connection
but after sometime server is disconnecting from the client
and the error in not traceable.
You should check the rabbitmq log (and log configuration) and also test with different keep alive values.
I have following script to get given file from given remote directory by accepting following parameters
Host Name that you are connecting to get File
User Name of the Host
Local Directory where you wanted to transfer file
Remote Directory from where you wanted to get file
File name that you wanted to get from Remote server
FSERVER=$1
FUSER=$2
SRC_DIR=$3
REMOTE_SRC_DIR=$4
FILE_NAME=$5
cd $SRC_DIR
sftp $FUSER#$FSERVER <<GOTO
cd $REMOTE_SRC_DIR
ascii
get $FILE_NAME
bye
To access the files from $REMOTE_SRC_DIR to SRC_DIR do I need port open from both side? I.e. bi-directional or just one port from Remote Server to Source and it should need "INITIATE" session from the source. And what is the reason?
As per my understanding we are connecting to remote server path and then writing the query Get File name. So we need to bi-directional access.
SFTP uses a single TCP connection. In general, TCP connection is stateful. As such, once opened both sides can send data to each other. Only the passive side of the connection needs to initially have a well known port number opened (22 for SSH/SFTP in this case). The active side opens a random port number that the passive side learns from the TCP connection initiation packed. This passive-side port closes with the TCP connection. While the active-side port is kept open for future TCP connections.
The SFTP protocol uses strictly request-response model. I.e. although the TCP allows both sides to send data anytime, with the SFTP, the server never sends data on its own, but always in a response to client request. Note that this does not mean, that no unsolicited data flows from the server to the client on network level, as in both underlying protocols of the SFTP (the TCP and the SSH) both sides of connection can send (and send) packets anytime.
Simplified flow is:
SFTP client initiates TCP connection to remote port 22 (this causes implicit open of random local port on client side, this is done by operating system).
SSH protocol initialization and authentication occurs.
SFTP client requests SSH server to start SFTP server. Note that SFTP server is not a continuously running process. It is a sub-process/sub-service of SSH server, which is continuously running (=listening on port 22)
SFTP protocol initialization occurs.
SFTP (contrary to FTP protocol) is stateless, as such it does not have a concept of a working directory. As such changing remote working directory with the cd command is simulated on client side. The SFTP server is not aware at all of client remote working directory. SFTP client typically only verifies existence of the new working directory with the SFTP server.
The ascii command: The OpenSSH sftp client does not have ascii command. You should get "Invalid command." Unless you use other client than OpenSSH.
The get command: For file transfers the SFTP protocol offers a similar block-level API as most operating systems (contrary to a stream API of FTP protocol). So SFTP client sends "open file" request, over the existing connection, followed by repetitive "read block" requests and "close file" request. As with any SFTP requests, responses go back over the same TCP connection.
At the end, the TCP connection is terminated and connection-specific random local port is closed.