Windows 10: Can ping ipv6 but not ipv4 on LAN Solved

  1.    22 Jun 2017 #1

    Can ping ipv6 but not ipv4 on LAN

    I just moved into my business partner's home office and I am trying to get Dev (computer #1, Win10 Pro) to see DbServer's (computer #2, also Win10 Pro) Postgres Database to no avail so far.

    He has a Comacast router which seems to be using using IPv6 primarily. When I go to WhatisMyIP, I get a v6 address. Ok, I think finally time to get my head around IPv6.

    During debugging I ran an interesting effect which may or may not be the related to my connectivity problems.

    Dev can ping DbServer's v6 address but not its v4. DbServer can ping Dev's v4 address but not its v6. I can RDP into DbServer from Dev using either v6 or v4 just fine.
      My ComputersSystem Spec

  2.    22 Jun 2017 #2

    It's rare for most routers to use ipv6 on the LAN disable it on all PCs make sure all PCs are in the same workgroup and all have ipv4 IP in the same range make sure NetBIOS is running on all PCs
      My ComputerSystem Spec

  3.    22 Jun 2017 #3

    While looking around for the settings you want I noticed that DbServer was on a Public Network while Dev was correctly on a Private Network. The last time I moved this computer it defaulted to Public network then as well.

    My database access is working now. though interestingly, neither computer can now ping the others IPv6 address, just the v4 addresses.

    The IPv6/v4 ping pro
      My ComputersSystem Spec


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