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Linux中通過緩存DNS的解析來提高上網的響應速度

←手機掃碼閱讀     火星人 @ 2014-03-23 , reply:0

用Firefox瀏覽網頁的時候,一開始總會看到左下角有一行提示:

「正在解析主機 xxx ...」

看上去是等待DNS伺服器對域名的解析,於是閑來無事,決定做一個DNS Cache來提高下速度!

找了一下,有一個:

[xport@ubuntu ~] $ apt-cache search "dns" | fgrep "cach"
dnsmasq - A small caching DNS proxy and DHCP server

去翻翻資料,設定的步驟如下:

1. 安裝dnsmasq:
# 安裝dnsmasq的軟體包
[xport@ubuntu ~] $ sudo apt-get install "dnsmasq"

2.設定dnsmasq接管本機的DNS解析請求:
# 修改dnsmasq的配置文件
[xport@ubuntu ~] $ sudo gedit /etc/dnsmasq.conf

# 找到下面的內容,並進行修改
# If you want dnsmasq to listen for DHCP and DNS requests only on
# specified interfaces (and the loopback) give the name of the
# interface (eg eth0) here.
# Repeat the line for more than one interface.
# interface=
# Or you can specify which interface _not_ to listen on
# except-interface=
# Or which to listen on by address (remember to include 127.0.0.1 if
# you use this.)
listen-address=127.0.0.1 # 把這一行前面的註釋去掉

3.修改dhclient的配置:
# 修改dnsmasq的配置文件
[xport@ubuntu ~] $ sudo gedit /etc/dhcp3/dhclient.conf

# 找到下面的內容,並進行修改
prepend domain-name-servers 127.0.0.1; # 把這一行前面的註釋去掉
request subnet-mask, broadcast-address, time-offset, routers,
domain-name, domain-name-servers, host-name,
netbios-name-servers, netbios-scope;

4.修改resolv.conf的配置:
[xport@ubuntu ~] $ sudo gedit /etc/resolv.conf

# 因為dnsmasq會接管本機的DNS解析請求,所以把127.0.0.1的地址放在最前面
nameserver 127.0.0.1
nameserver xxx.xxx.xxx.xxx
nameserver xxx.xxx.xxx.xxx
search localdomain

5. 重新開啟dnsmasq的服務:
[xport@ubuntu ~] $ sudo /etc/init.d/dnsmasq restart

[火星人 ] Linux中通過緩存DNS的解析來提高上網的響應速度已經有1177次圍觀

http://coctec.com/docs/linux/show-post-122948.html