@Алекс it is really standard Linux lore: search for linux two ip addresses on one nic with Google, you will see lots of references. You could also have multiple addresses belonging to disjoint subnets. Basically, the reason for this is that an IP address identifies a connection, while a MAC address identifies a device.

Apr 10, 2020 · If you have several devices on your network that get IP addresses from DHCP, don't reserve the same IP address you found in Command Prompt. For example, if DHCP is set up to serve addresses from a pool between 192.168.1.2 and 192.168.1.20, configure the IP address to use a static IP address that falls outside that range to avoid address conflicts. To do this, you need to enable IP forwarding in the configuration file, usually stored at /etc/sysctl.conf: Find and uncomment the net.ipv4.ip_forward=1 line: Save the changes and exit the file. #docker images debian REPOSITORY TAG IMAGE ID CREATED SIZE debian latest 978d85d02b87 5 months ago 123MB #docker run -it --hostname web-server --name Apache debian /bin/bash root@web-server:/# ip a l eth0 45: eth0@if46: mtu 1500 qdisc noqueue state UP group default link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff SSH Port forwarding is used to forward ports between a local and a remote Linux machine using SSH protocol. It is mainly used to encrypt connections to different applications. Even if that application doesn’t support SSL encryption, SSH port forwarding can create a secure connection.

Configuring IP Forwarding Policies

IP forwarding should be enabled when you want the system to act as a router, that is transfer IP packets from one network to another. In the simplest case, consider a server with two physical ethernet ports which is meant to connect to two different networks (say your internal network and the outside world as provided by a DSL modem). By now, you should be comfortable with forwarding ports on a Linux server with iptables. The process involves permitting forwarding at the kernel level, setting up access to allow forwarding of the specific port's traffic between two interfaces on the firewall system, and configuring the NAT rules so that the packets can be routed correctly. First make sure that the IP forwarding is enabled on Linux following the "Enable Linux IP forwarding" Section in Setting Up Gateway Using iptables and route on Linux. This is the rules to forward connections on port 80 of the gateway to the internal machine:

Jul 05, 2009 · You can easily turn on IP forwarding under Linux operating system by modifying Linux kernel variables (MIB). Linux Enable IP Forwarding Open /etc/sysctl.conf file using a text editor, enter:

Defaultly any UNIX/Linux distributions will have IP Forwarding is disabled. As most of the peoples will not need IP Forwarding, but if we are setting up a Linux router/gateway, when you want your system to act as VPN server, and for sharing the internet connection. See the below steps for enable or disable IP forwarding in linux. How-To: Redirecting network traffic to a new IP using Dec 05, 2008 How to find your IP address in Linux | Opensource.com Feb 07, 2020