January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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Linux
｜
59
怎样，把下面这行代码添加到
/etc/sysctl.conf
中或者添加到
/etc/sysctl.d
的配置文件中。
net.ipv4.ip_forward = 1
要想启用
IPv6
转发，可以添加下面这行代码。
net.ipv6.conf.all.forwarding = 1
接下来，既可以重启
Linux
主机使改动生效，也可以执行
sysctl -p
<path to file with
new setting>
。
单个配置文件还是多个配置文件
？
之前不止一次提过，在某些情况下，
Linux
发行版会使用目录（
/etc/network/interfaces.d
或
/etc/sysctl.d
）中的多个配置文件。哪种方法更好呢？这个问题在
Linux
系统管理员
之间存在一些争议，其实两种方法各有利弊。当你使用配置管理工具时，使用多个配
置文件可能更有优势（这类工具能够帮助管理配置文件及其内容），但无论采用哪种
方法都没问题。
只要启用了
IP
转发，
Linux
系统就可以被当作路由器使用了。这时的
Linux
系统只能执行
静态路由，你需要使用
ip route
命令提供所有必要的路由信息，以便流量能够被正确路由。
不过，
Linux
也有动态路由协议守护进程
，能够让
Linux
路由器参与动态路由协议（比如
BGP
或
OSPF
）。
将
Linux
整合到动态路由环境中的两个流行选择是
Quagga
和
BIRD
。
利用
IPT
able
（或是其继任者
NFTables
）等特性，还可以加入网络地址转换（
Network
Address Translation ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.