Thank you for your answer
Unable to disable IPv6 privacy extension，I tried to change the settings, but the temporary IPv6 address will still appear after restarting the computer.
/etc/sysctl.conf
net.ipv6.conf.all.use_tempaddr = 0
net.ipv6.conf.default.use_tempaddr = 0
net.ipv6.conf.enp4s0.use_tempaddr = 0
/etc/sysctl.d/99-openmediavault.conf
# Enable IPv6 privacy extension
net.ipv6.conf.all.use_tempaddr = 0
net.ipv6.conf.default.use_tempaddr = 0
net.ipv6.conf.enp4s0.use_tempaddr = 0
Don't know where else to set？
After restarting the computer, the network card information is as follows：
root:/etc #ifconfig
enp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.100 netmask 255.255.255.0 broadcast 192.168.0.255
inet6 fe80:::*:*:*:* prefixlen 64 scopeid 0x20<link>
inet6 2409:8a1e:91cd:b1d0:*:*:*:*
inet6 2409:8a1e:91cd:b1d0:d59d:4e01:4418:312a
....
....