Suppose you have an OpenVPN server. Now, you want to set two public IP addresses on it. Your public IP addresses are:
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1.2.3.4
1.2.3.5
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# ifconfig
enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.0.2.15 netmask 255.255.255.0 broadcast 10.0.2.255
inet6 fe80::a00:27ff:feed:b47c prefixlen 64 scopeid 0x20<link>
ether 08:00:27:ed:b4:7c txqueuelen 1000 (Ethernet)
RX packets 14915 bytes 2455731 (2.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 11701 bytes 1581492 (1.5 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 4 bytes 336 (336.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4 bytes 336 (336.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
I'm sure this thread is useful for many users.
Thank you.