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Client Networ and Remote Network Overlap

Posted: Thu Dec 10, 2020 9:22 am
by tommys
Server configuration:
  • SoftEther server running on a Hyper-V VM with two network adapters (promiscuous mode set)
  • A local bridge between my one virtual hub and my physical LAN
  • 192.168.1.1/24 subnet
  • SE Protocol
I have a remote user on Windows 10 client device that is also on a 192.168.1/24 subnet. This client was not being assigned an IP by the remote DHCP server. SecureNAT/DHCP solved that and now the client has an IP address. With the SoftEther created IP address, this client can access remote network resources only if they don't share an address with something on their local network.

For example if 192.168.1.23 exists on the user's home network as a Samsung smart TV and 192.168.1.23 exists on the SoftEther server's corporate network as an FTP server, the client will only be able to reach the local Samsung smart TV. But if 192.168.1.155 exists on the SoftEther server's corporate network but not on the user's home network, the user can reach the 192.168.1.155 server. Any idea why this is happening? I would greatly appreciate the help.

Here is the client's (192.168.1.42) IPv4 route table.

Code: Select all

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0     192.168.30.1    192.168.30.11      2
    VPN_SERVER_IP  255.255.255.255      192.168.1.1     192.168.1.42     25
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    331
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    331
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    331
    130.158.6.110  255.255.255.255      192.168.1.1     192.168.1.42     25
      192.168.1.0    255.255.255.0         On-link      192.168.1.42    281
     192.168.1.42  255.255.255.255         On-link      192.168.1.42    281
    192.168.1.255  255.255.255.255         On-link      192.168.1.42    281
     192.168.30.0    255.255.255.0         On-link     192.168.30.11    257
    192.168.30.11  255.255.255.255         On-link     192.168.30.11    257
   192.168.30.255  255.255.255.255         On-link     192.168.30.11    257
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    331
        224.0.0.0        240.0.0.0         On-link      192.168.1.42    281
        224.0.0.0        240.0.0.0         On-link     192.168.30.11    257
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    331
  255.255.255.255  255.255.255.255         On-link      192.168.1.42    281
  255.255.255.255  255.255.255.255         On-link     192.168.30.11    257