7/28/2023 0 Comments Stunnel sshOn each workstation, install stunnel and re-route unencrypted port 23 traffic to encrypt and send out on port 6707. Configure stunnel encrypted SSH traffic on port 6707 and 're-route' the decrypted traffic to port 23, but don't disable port 23 just yet you'll be able to use both ports temporarily until you get all the workstations switched. You will have to install stunnel on the server and every client so there is some work, but it can be done "over time" so there shouldn't be much downtime.įirst, install stunnel on your server and configure it for a high port - for this example, let's use 6707. There is a way to "re-route" telnet over a secure SSH tunnel with a product called 'stunnel.' There are free stunnel implementations for Windows, Linux and AIX, and I have tested using it across architectures (Windows Client to an AIX server, Linux client to Windows server, etc.) so it's basically architecture agnostic. It does not matter if you even used Linux, and had to solve the same task, the solution would be exactly the same. Using the right SSH client, which will support Kerberos. In this case, any user already signed on on their machine with Active Directory account, may get fast connection to the system on Caché through SSH, without any prompt for login/password. Target Windows server and Caché should be configured for Kerberos authentication, as well as SSH server. Your users in Caché, should be tied with Active Directory accounts. I would suggest that, if you have Windows in your park machine, you may have Active Directory, so, Singe Sign On with Active Directory, looks the best way (it's even possible with Linux). And I see only one way, how to implement it, is using Kerberos. You have to understand that ssh connection should use authentication, and for sure it should be done on InterSystems side, it's should be done on SSH level. I'm against implementing it directly in Caché/IRIS.īack to your the next issue. On Linux InterSystems does not have even telnet, for the same reasons. Thus, application communication is secured without requiring any changes to the application or end user workflows.You should understand that there are no reasons, to implement something, which can be done better with external solutions. The server then establishes a connection to the actual application server, which is usually located on the same machine or in the same data center as the SSH server. The SSH client then sends the application to the server via an encrypted tunnel. When tunneling is enabled, the application connects to a local host port that the SSH client listens on. The application uses the SSH connection to connect to the application server. SSH tunneling adds network security to legacy applications that do not support encryption natively. This means that the application data traffic is routed through an encrypted SSH connection, making it impossible to eavesdrop on or intercept while in transit. It also allows you to secure the data traffic of any given application by using port forwarding, which essentially tunnels any TCP/IP port over SSH. SSH is a protocol that allows for secure remote logins and file transfers over insecure networks. It can also be used to set up VPNs (Virtual Private Networks) and connect to intranet services behind firewalls. It can be used to secure legacy applications. SSH tunneling is a technique for sending arbitrary network data over an encrypted SSH connection.
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