Get the latest tutorials on SysAdmin and open source topics. Hub for Good Supporting each other to make an impact. Write for DigitalOcean You get paid, we donate to tech non-profits. After setting up the bare minimum configuration for a new server, there are some additional steps that are highly recommended in most cases. Before you start this guide, you should run through the CentOS 7 initial server setup guide. This is necessary in order to set up your user accounts, configure privilege elevation with sudo , and lock down SSH for security. Once you have completed the guide above, you can continue with this article. In this guide, we will be focusing on configuring some optional but recommended components.
Custom Bridge, Existing Network (and interface)
The SYN cookies activation allows your system to accept an unlimited number of TCP connections while still trying to give reasonable service during a denial of service attack. In other words, did the response packet originate from the same interface through which the source packet was sent? It's recommended for single-homed systems and routers on stub networks. Since those are the configurations this firewall is designed to support, I turn it on by default. Turn it off if you use multiple NICs connected to the same network. It's used to build a DMZ.
Docker Bridge, Routed Network
Server Fault is a question and answer site for system and network administrators. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. I have hosts A,B and C. From host A I can access through ssh only B. From B I can access C. I want to be able to run X11 programs on C and forward display to A. Assuming the problem is that the middle machine doesn't have X, but it otherwise configured to allow forwarding X11, just install xauth. You have to make sure X11Forwarding is enabled on destination and all intermediate sshds you are using.
Join Stack Overflow to learn, share knowledge, and build your career. Connect and share knowledge within a single location that is structured and easy to search. I have a server VLAN of How do I configure a bridge network on my Docker host VM so that all the containers can connect directly to my LAN network without having to redirect ports around on the default I tried searching but all the howtos I've found so far have resulted in losing SSH session which I had to go into the VM from a console to revert the steps I did. There's multiple ways this can be done. The two I've had most success with are routing a subnet to a docker bridge and using a custom bridge on the host LAN.