Reputation: 48526
What is the different between 127.0.0.1 and ::1
Originally, there is one third library used in my legacy codes, and one IP address configuration for it. Its default value is localhost. For IPV4, we know, the value of localhost is 127.0.0.1.
However, I find this value changed to ::1. According to this, ::1 represents the localhost for IPV6 and whole address is 0:0:0:0:0:0:0:1.
Here are my questions:
Is there any different between
127.0.0.1and::1? If::1is used, any impact on my program?For the
localhostconfiguration. Why127.0.0.1is used sometime, while::1is used sometime? Does it depend on the OS?
Upvotes: 0
Views: 166
Answers (1)
Reputation: 21460
127.0.0.1 is an IPv4 address while ::1 is the equivalent IPv6 address.
There is no other difference beside the IP protocol version between the two. Semantically, they behave the same, as long as your stack supports both protocols.
Upvotes: 2
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