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ping -4
ping -6

ping6 -I eth1

# 查看路由
/sbin/ip -6 route show dev br0

route -A inet6

telnet 2408:400a:6c:3cff:d219:5fcd:9528:535 80

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curl -6 http://[2409:8089:1111:6010:7001::0021]:10002/

curl -6 -g -i -L 'http://[2409:8089:1111:6010:7001::0021]:443'

# LocalLink:
curl -g -6 http://[fe80::5054:ff:feab:185%eth0]:8080/

# curl v7.61.0+ 无论本地是否启用 ipv6, 都会先尝试 ipv6 连接, 不需要显式使用 -6 参数
curl -i http://[2408:400a:6c:1111:d219:5fcd:9528:535]
curl -i -6 http://[2408:400a:6c:1111:d219:5fcd:9528:535]
curl -i -6 https://[2408:400a:6c:1111:d219:5fcd:9528:535]:443/

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listen 80;
listen [::]:80;