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Muhammad Dyas Yaskur
Asked: 2017-07-07 19:08:13 +0800 CST

How to access 127.0.0.2 3 etc to other computer/network over LAN?

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I have 2 computer(A n B) which connected same wifi. If i want to access my localhost(127.0.0.1) from computer A to B i just enter LAN IP(example http://192.168.99.5) on computer B. But how to access 127.0.0.2 or 127.0.0.3 etc to other computer?

ubuntu

2 Answers

  1. Best Answer

    Any packets with an address in the 127.0.0.0/8 range can never appear on any network anywhere. Traffic sent to an address in that range will immediately loop back inside the host.

    Start with RFC 1700, Assigned Numbers:

    (g) {127, }

    Internal host loopback address. Should never appear outside a host.

    There are other RFCs in that vein, including the one mentioned by @joeqwerty in the comment, RFC 3330, Special-Use IPv4 Addresses:

    127.0.0.0/8 - This block is assigned for use as the Internet host loopback address. A datagram sent by a higher level protocol to an address anywhere within this block should loop back inside the host. This is ordinarily implemented using only 127.0.0.1/32 for loopback, but no addresses within this block should ever appear on any network anywhere [RFC1700, page 5].

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  2. If you need to connect to a local loopback 127.0.0.0/8 network on another computer, the connection must originate from the same machine. You may need to do so for example if a service is only bind to 127.0.0.1; therefore, it cannot be connected using LAN/public IP. This can be achieved several ways, but using an SSH tunnel is the easiest to set up.

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