原文链接：统信UOS操作系统上禁用IPv6
hello，大家好啊！继之前我们讨论了如何在麒麟KYLINOS上禁用IPv6之后，今天我要给大家带来的是在统信UOS操作系统上禁用IPv6的方法。IPv6是最新的网络通信协议，但在某些特定的网络环境或测试场景中，可能需要禁用IPv6以确保兼容性或满足其他需求。本文将介绍在统信UOS上通过命令行的两种方式来禁用IPv6。让我们开始吧

注意事项

• 在进行系统配置更改之前，请确保您了解这些更改的影响，并考虑备份相关配置文件。
• 禁用IPv6可能会影响您的网络连接和某些依赖IPv6的应用程序或服务。
• 如果您不确定是否需要禁用IPv6，请咨询您的网络管理员或技术支持团队。

一、使用ipv6后的现象
1.查看系统信息

pdsyw@pdsyw-PC:~/Desktop$ cat /etc/os-version 
[Version] 
SystemName=UOS Desktop
SystemName[zh_CN]=统信桌面操作系统
ProductType=Desktop
ProductType[zh_CN]=桌面
EditionName=Professional
EditionName[zh_CN]=专业版
MajorVersion=20
MinorVersion=1060
OsBuild=11018.101.100
pdsyw@pdsyw-PC:~/Desktop$ uname -a
Linux pdsyw-PC 4.19.0-amd64-desktop #6108 SMP Wed Sep 13 13:27:25 CST 2023 x86_64 GNU/Linux
pdsyw@pdsyw-PC:~/Desktop$ 

2.ping网页查看，发现使用的是ipv6地址

pdsyw@pdsyw-PC:~/Desktop$ ping www.baidu.com
PING www.baidu.com(240e:e9:6002:15a:0:ff:b05c:1278 (240e:e9:6002:15a:0:ff:b05c:1278)) 56 data bytes
64 bytes from 240e:e9:6002:15a:0:ff:b05c:1278 (240e:e9:6002:15a:0:ff:b05c:1278): icmp_seq=1 ttl=52 time=197 ms
64 bytes from 240e:e9:6002:15a:0:ff:b05c:1278 (240e:e9:6002:15a:0:ff:b05c:1278): icmp_seq=2 ttl=52 time=39.2 ms
64 bytes from 240e:e9:6002:15a:0:ff:b05c:1278 (240e:e9:6002:15a:0:ff:b05c:1278): icmp_seq=3 ttl=52 time=60.3 ms
64 bytes from 240e:e9:6002:15a:0:ff:b05c:1278 (240e:e9:6002:15a:0:ff:b05c:1278): icmp_seq=4 ttl=52 time=45.7 ms
^C
--- www.baidu.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 6ms
rtt min/avg/max/mdev = 39.234/85.441/196.577/64.614 ms
pdsyw@pdsyw-PC:~/Desktop$ 

3.使用ping -4 网页，使用的是ipv4地址

pdsyw@pdsyw-PC:~/Desktop$ ping -4 www.baidu.com
PING www.a.shifen.com (180.101.50.188) 56(84) bytes of data.
64 bytes from 180.101.50.188 (180.101.50.188): icmp_seq=1 ttl=50 time=52.5 ms
64 bytes from 180.101.50.188 (180.101.50.188): icmp_seq=2 ttl=50 time=108 ms
64 bytes from 180.101.50.188 (180.101.50.188): icmp_seq=3 ttl=50 time=46.9 ms
64 bytes from 180.101.50.188 (180.101.50.188): icmp_seq=4 ttl=50 time=54.4 ms
^C
--- www.a.shifen.com ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 6ms
rtt min/avg/max/mdev = 46.913/65.411/107.818/24.638 ms
pdsyw@pdsyw-PC:~/Desktop$ 

4.查看网卡信息，wlp5s0上有ipv6的信息

pdsyw@pdsyw-PC:~/Desktop$ ifconfig 
enp4s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500ether 38:f7:cd:c4:72:9f  txqueuelen 1000  (Ethernet)RX packets 0  bytes 0 (0.0 B)RX errors 0  dropped 0  overruns 0  frame 0TX packets 0  bytes 0 (0.0 B)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0device interrupt 46  base 0xd000  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536inet 127.0.0.1  netmask 255.0.0.0inet6 ::1  prefixlen 128  scopeid 0x10<host>loop  txqueuelen 1000  (Local Loopback)RX packets 724  bytes 58768 (57.3 KiB)RX errors 0  dropped 0  overruns 0  frame 0TX packets 724  bytes 58768 (57.3 KiB)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0wlp5s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500inet 192.168.0.247  netmask 255.255.255.0  broadcast 192.168.0.255inet6 fe80::d3a3:a08e:e3bb:90a3  prefixlen 64  scopeid 0x20<link>inet6 240e:46d:8810:209b:fe52:8d91:6f5d:52c5  prefixlen 64  scopeid 0x0<global>ether 50:5a:65:c3:30:79  txqueuelen 1000  (Ethernet)RX packets 484  bytes 116482 (113.7 KiB)RX errors 0  dropped 0  overruns 0  frame 0TX packets 482  bytes 65776 (64.2 KiB)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0pdsyw@pdsyw-PC:~/Desktop$ 

二、禁用ipv6的操作
方法一：编辑配置文件禁用ipv6
1.编辑/etc/sysctl.conf 文件，禁用ipv6相关信息

pdsyw@pdsyw-PC:~/Desktop$ sudo vim /etc/sysctl.conf 
请输入密码:
验证成功
pdsyw@pdsyw-PC:~/Desktop$ grep disable_ipv6 /etc/sysctl.conf 
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
pdsyw@pdsyw-PC:~/Desktop$ 
pdsyw@pdsyw-PC:~/Desktop$ sudo sysctl -p
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
pdsyw@pdsyw-PC:~/Desktop$ 

2.查看网卡信息，wlp5s0上无ipv6的信息

pdsyw@pdsyw-PC:~/Desktop$ ifconfig 
enp4s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500ether 38:f7:cd:c4:72:9f  txqueuelen 1000  (Ethernet)RX packets 0  bytes 0 (0.0 B)RX errors 0  dropped 0  overruns 0  frame 0TX packets 0  bytes 0 (0.0 B)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0device interrupt 42  base 0xf000  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536inet 127.0.0.1  netmask 255.0.0.0loop  txqueuelen 1000  (Local Loopback)RX packets 35  bytes 3080 (3.0 KiB)RX errors 0  dropped 0  overruns 0  frame 0TX packets 35  bytes 3080 (3.0 KiB)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0wlp5s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500inet 192.168.0.247  netmask 255.255.255.0  broadcast 192.168.0.255ether 50:5a:65:c3:30:79  txqueuelen 1000  (Ethernet)RX packets 248  bytes 58035 (56.6 KiB)RX errors 0  dropped 0  overruns 0  frame 0TX packets 244  bytes 32743 (31.9 KiB)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0pdsyw@pdsyw-PC:~/Desktop$ 

3.ping网页，使用的是ipv4地址

pdsyw@pdsyw-PC:~/Desktop$ ping www.baidu.com
PING www.a.shifen.com (180.101.50.242) 56(84) bytes of data.
64 bytes from 180.101.50.242 (180.101.50.242): icmp_seq=1 ttl=50 time=21.4 ms
64 bytes from 180.101.50.242 (180.101.50.242): icmp_seq=2 ttl=50 time=73.1 ms
64 bytes from 180.101.50.242 (180.101.50.242): icmp_seq=3 ttl=50 time=49.9 ms
^C
--- www.a.shifen.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 4ms
rtt min/avg/max/mdev = 21.373/48.149/73.129/21.168 ms
pdsyw@pdsyw-PC:~/Desktop$ 

4.重启系统

5.重启后网卡无ipv6信息

pdsyw@pdsyw-PC:~/Desktop$ ifconfig 
enp4s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500ether 38:f7:cd:c4:72:9f  txqueuelen 1000  (Ethernet)RX packets 0  bytes 0 (0.0 B)RX errors 0  dropped 0  overruns 0  frame 0TX packets 0  bytes 0 (0.0 B)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0device interrupt 42  base 0xf000  lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536inet 127.0.0.1  netmask 255.0.0.0loop  txqueuelen 1000  (Local Loopback)RX packets 35  bytes 3080 (3.0 KiB)RX errors 0  dropped 0  overruns 0  frame 0TX packets 35  bytes 3080 (3.0 KiB)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0wlp5s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500inet 192.168.0.247  netmask 255.255.255.0  broadcast 192.168.0.255ether 50:5a:65:c3:30:79  txqueuelen 1000  (Ethernet)RX packets 248  bytes 58035 (56.6 KiB)RX errors 0  dropped 0  overruns 0  frame 0TX packets 244  bytes 32743 (31.9 KiB)TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0pdsyw@pdsyw-PC:~/Desktop$ 

方法二：使用sed命令禁用ipv6
1.使用sed添加禁用ipv6的信息

pdsyw@pdsyw-PC:~/Desktop$ sudo sed -i '$anet.ipv6.conf.all.disable_ipv6 = 1' /etc/sysctl.conf 
请输入密码:
验证成功
pdsyw@pdsyw-PC:~/Desktop$ sudo sed -i '$anet.ipv6.conf.default.disable_ipv6 = 1' /etc/sysctl.conf 
pdsyw@pdsyw-PC:~/Desktop$ 
pdsyw@pdsyw-PC:~/Desktop$ sudo sed -i '$anet.ipv6.conf.lo.disable_ipv6 = 1' /etc/sysctl.conf 
pdsyw@pdsyw-PC:~/Desktop$ 
pdsyw@pdsyw-PC:~/Desktop$ sudo sysctl -p
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
pdsyw@pdsyw-PC:~/Desktop$ 

通过在统信UOS上禁用IPv6，您可以根据特定的网络需求或测试要求调整系统配置。希望这篇文章能帮助到需要在统信UOS上禁用IPv6的朋友们。如果你有任何问题或者更多的经验分享，请在评论区留言，我们一起讨论。
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