linux►notes

Linux之网络配置

DNS

Debian+

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# interfaces; configured by dns-nameserver
$ cat /etc/network/interfaces
...
auto wlan0
allow-hotplug wlan0
iface wlan0 inet static
	address 192.168.8.160
	netmask 255.255.255.0
	network 192.168.8.1
	gateway 192.168.8.1
	broadcast 192.168.8.255
	wpa-essid "<wifi-id>"
	wpa-psk "<wifi-password>"
	dns-nameserver 8.8.8.8
	dns-nameserver 8.8.4.4
	dns-nameserver 192.168.8.1

Proxy

全局代理

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export http_proxy=socks5://<host>:<port>
export https_proxy=socks5://<host>:<port>

适用

  • cURL

Git 代理

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# 设置代理
git config --global https.proxy socks5://<host>:<port>
git config --global https.proxy socks5://<host>:<port>

# 取消
git config --global --unset http.proxy
git config --global --unset https.proxy

CMD ip

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via : [FAMILY] ADDRESS, 指定下一跳地址
src : ADDRESS, 发送至目的地时优先使用的源地址

table

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# show table
ip route show table all
ip route show table 10

# add table
ip route add 192.168.6.0/24 dev br0 table 10
ip route add default via 192.168.6.1 table 10

# 删除 table
ip route delete table 12 192.168.9.0/24

rule

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# show rule
ip rule show

# 添加
ip rule add from 192.168.6.0/24 table 10 priority 1

gateway

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# 添加
ip route add default via 192.168.1.1 dev eth0

# 更新 (所有配置都要添加vc)
ip route replace default via 192.168.1.1 dev eth0

静态路由

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# github ip 走网关 192.168.6.68 
sudo ip route add 20.205.243.166 via 192.168.6.68

CMD route

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# 添加路由
route -q -n add -inet 192.168.6.0/24 -interface utun3

Route Trace

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$ traceroute -4 baidu.com
$ traceroute -6 baidu.com  # ipv6
$ traceroute -g 192.168.6.1 # 指定 gateway

tcpdump

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# 客户端抓取向服务端发送的数据
$ tcpdump dst host {dst-host} and  dst port {dst-port} -w out.pacp