![]() Machine3 - IP: 333.333.333.333 - Hosts the ftp-server that machine1 wants to connect to. Machine2 - IP: 222.222.222.222 - Forwards incomming connections to Machine3 Machine1 - IP: 111.111.111.111 - Behind firewall, and wants to connect to Machine3. To make it clear, we have the following machines: So we can set up this port forwarding machine with the help of rinetd. Okay, so how do we go about actually implementing this? Rinetd - Port forward/redirect We will have home-computer/port-80 -> port-80/proxy-machine/port-21 -> ftp-serverĪnd the other way around of course, to receive the traffic. So instead of having this kind of traffic home-computer/port-21 -> ftp-server/port-21 What we can do is add a machine that redirect/forward all traffic that it receives on port 80 to port 21 on a different machine. So how are we going to be able to connect to our ftp-server? But someone has put some crazy firewall rules (egress filters) that prohibits outgoing traffics on all ports except for port 80. So imagine that you are on a network and you want to connect to a ftp server (or any other port) to upload or download some files. Port forwarding and tunneling Port forwarding These machines are connected to other networks, so we can use them to pivot. We are looking for machines that have at least THREE network interfaces (loopback, eth0, and eth1 (or something)). The pivot is just used as a way to channel/tunnel our attack. The technique of using one compromised machine to access another is called pivoting. You will use the first machine as a staging point/plant/foothold to break into machine 2. Let's say that you have compromised one machine on a network and you want to keep going to another machine. What is a good approach to doing this on Windows 10 or 11? I would like to set up one proof of concept system.Common ports\/services and how to use themīroken Authentication or Session Managementĭefault Layout of Apache on Different Versions That means updates (such as changes to a server that require an update to client settings) need to be able to be pushed to remote clients in a fairly automated way. What tools would I need to use to set this up? The procedure ultimately has to be something that can be managed for a remote team. I'm tasked with this because I know a little about using OpenSSH on Linux. However, I don't have any personal experience using Windows. I also know that there is a Windows subsystem for Linux. ![]() I read that there is a built-in Windows 10 SSH client that became part of Windows starting from Windows 10 v1809 and Windows Server 2019. These need to be under the management of the admin account, not the user account. On six (or more) business laptops for a small startup, we need to set up SSH tunnels that start at bootup and stay up all the time without any user intervention.Įach tunnel needs to have a local port, to establish a connection with a Linux server using ed25519 keys, to be monitored by autossh or similar so the tunnel stays connected. (Also, btw, that similar question has several answers that reference products which no longer exist and none of the answers there answer my question.) ![]() In contrast, I'm looking for something that will run under the admin account without any action by the user and be rock solid. Even some of the answers there admit that those solutions can be inconvenient and unreliable. That other question focuses on tools a single user can set up and manage themselves. My solution requires a Linux OpenSSH server and Windows clients. The accepted answer at the similar question Automatic SSH tunneling from Windows - Super User recommends Bitvise Tunnelier which requires a Windows client and Windows server. ![]()
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