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67 lines
2.0 KiB
Markdown
67 lines
2.0 KiB
Markdown
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# Quick Start Guide
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## Linux Kernel Requirement
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### Kernel Version
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Use `uname -r` to check the kernel version on your machine.
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> **Notes**
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> If you find your kernel version is `< 5.8`, follow the guide [HERE](./kernel-upgrade.md) to upgrade the kernel to the minimum required version.
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**Bind to LAN: >= 5.8**
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You need bind dae to LAN interface, if you want to provide network service for LAN as an intermediate device.
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This feature requires the kernel version of machine on which dae install >= 5.8.
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Note that if you bind dae to LAN only, dae only provide network service for traffic from LAN, and not impact local programs.
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**Bind to WAN: >= 5.8**
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You need bind dae to WAN interface, if you want dae to provide network service for local programs.
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This feature requires kernel version of the machine >= 5.8.
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Note that if you bind dae to WAN only, dae only provide network service for local programs and not impact traffic coming in from other interfaces.
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### Kernel Configuration Item
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Usually, mainstream desktop distributions have these items turned on. But in order to reduce kernel size, some items are turned off by default on embedded device distributions like OpenWRT, Armbian, etc.
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Use following command to show kernel configuration items on your machine.
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```shell
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zcat /proc/config.gz || cat /boot/{config,config-$(uname -r)}
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```
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**Bind to LAN**
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```
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CONFIG_DEBUG_INFO_BTF
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```
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**Bind to WAN**
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```
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CONFIG_DEBUG_INFO_BTF
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```
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Check them using command like:
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```shell
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(zcat /proc/config.gz || cat /boot/{config,config-$(uname -r)}) | grep 'CONFIG_DEBUG_INFO_BTF='
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```
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### Enable IP Forwarding
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By default, any latest Linux distributions will have IP Forwarding `disabled`. In the case where we need to up a Linux router/gateway or a VPN server or simply a plain dial-in server, then we must need to enable forwarding. Do the followings to have `ip-forwarding` feature enabled:
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```shell
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sudo tee /etc/sysctl.d/dae.conf<<EOF
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net.ipv4.ip_forward = 1
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net.ipv6.conf.all.forwarding = 1
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EOF
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sudo sysctl --system
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```
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