what is 127 0 0 1 127 0 0 1 is the loopback address commonly known as localhost which is the name that resolves to it by the local hosts file This file is in different locations depending on the OS but in most Linux distros it is in etc hosts This address always refers to the computer which made the request so 127 0 0 1 is not a real address so to speak
1 It simply means your local address When you test your NIC this can be done via ping 127 0 0 1 When you do this you are testing to make sure that your information can go down to layer 1 and back up If you suspect that your NIC is not working on a physical level this makes a very good test 127 0 0 1 is the loopback address also known as localhost 0 0 0 0 is commonly used as a non routable meta address used to designate an invalid unknown or non applicable target a no particular address placeholder However this is non standard and possibly in conflict with RFC 1122 In the context of a route entry it usually means the
what is 127 0 0 1
what is 127 0 0 1
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Why Is Localhost s IP Address 127 0 0 1 What Is Its Meaning
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IPv6 has just a single address 1 Various Internet Engineering Task Force IETF standards reserve the IPv4 address block 127 0 0 0 8 in CIDR notation and the IPv6 address 1 for this purpose The most common IPv4 address used is 127 0 0 1 Commonly these loopback addresses are mapped to the hostnames localhost or loopback TCP 127 0 0 1 49671 screenshots 49670 ESTABLISHED TCP 127 0 0 1 49670 screenshots 49671 ESTABLISHED where most of them are in pairs like that but some are not Most have state ESTABLISHED like those but some have TIME WAIT
I had this problem recently with a nodejs HTTPS server and the solution to it was not to use localhost 127 0 0 1 or even the domain name It was to use 0 0 0 0 I believe this acts as a wildcard now allowing for public resolution via the domain name and it also works with localhost 127 0 0 0 is the network address with netmask 255 0 0 0 or 127 0 0 0 8 127 0 0 1 is a host address in that network True 127 0 0 0 with mask 255 255 255 255 could theoretically also work In praxis that is a very bad idea since old software used to use the lowest address in a range as broadcast address
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Solution 2 This didn t work so well for me but might for you Stop automatic generation as instructed in the comments in etc hosts and change localhost to 1so they refer to the same adapter For compatibility 0 0 0 0binds to all interfaces 127 0 0 1 and 1 so it works That is 127 0 0 1 is called a loopback because it is merely a pointer that points back to your machine It s a reserved IP Address that can also be written as localhost by definition The purpose for this is to allow one to talk to one s computer by sending a signal outwards and then looping this back so that the signal is also read by your
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Why Is The Localhost IP 127 0 0 1
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