Source
r/networking•
CowFisho

Possible to force IP 0.0.0.X to WindowsNIC/ignore Reserved Subnets?

Troubleshooting

Short summary

I was updating the IP config to some PLCs (Logix 1769) when I accidentally set one of the PLCs to 0.0.0.X/24

The only way except pulling it apart to go the serial route is to force a new IP through RsLogix

Curiously we do have access to an Allen Bradley display where it would read modbus data if set to read from 0.0.0.X

BootP is unfortunately disabled

Question: is it possible to force a NIC in windows to 0.0.0.X/24 in any way, ignoring the reserved subnets?

Posted Jul 16, 2023, 7:48 PM UTC

12
TechnOllie•

Linux has no issue with this address range

1
pmormr"Devops"•

I highly doubt it. 0.0.0.0/8 isn't reserved, it's a special use subnet explicitly only allowed for use special cases, not as actual network addresses. Any RFC compliant network stack is going to throw back an error.

Rfc 1122 3.2.1.3b

(b) { 0, <Host-number> }

Specified host on this network. It MUST NOT be sent, except as a source address as part of an initialization procedure by which the host learns its full IP address

1