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linux_router:ubuntu [2023-06-18 Sun wk24 15:49] – [Ubuntu] baumkp | linux_router:ubuntu [2024-06-16 Sun wk24 13:29] – baumkp | ||
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- | {{tag> | + | {{tag> |
- | ======Router Basic Debian Server Setup====== | + | ======Router Basic Configuration |
+ | |||
+ | =====Router Configuration===== | ||
+ | <fc # | ||
+ | A router performs the following key features: | ||
+ | - A gateway between different network areas | ||
+ | - Restrict network traffic | ||
+ | - Forward Network traffic | ||
+ | - Track network traffic, allows traffic incoming only if response to out going (one way traffic) This is primary firewall action and primary security action! This is often confused with NAT, NAT is additional to this! | ||
+ | - NAT (Network Address Translation) is basically mandatory for IPv4 due to limited address space and optional for IPv6 | ||
+ | - NAT obfuscates Local IP addresses behind public addressable WAN IP address(es). | ||
+ | - NAT obfuscation wrecks simple end to end IP addressing that is required for some services, e.g. VoIP. This requires additional services to compensate, e.g. STUN/TURN services. | ||
+ | Key networks services, such as DNS and DHCP are separate functions that a router may perform, although correct router setup is required to allow these services to function. | ||
=====Debian===== | =====Debian===== | ||
- | Basically the same as Ubuntu, except I tried with Debian Buster (10). I updated to Debian Bullseye (11) with no major problems. When I updated to Bookwork (12) the update failed. | + | Basically the same as Ubuntu, except I tried with Debian Buster (10). I updated to Debian Bullseye (11). When I updated to Bookwork (12) the update failed. |
Having used Ubuntu for the past many years I have grown use to netplan. | Having used Ubuntu for the past many years I have grown use to netplan. |