Bug #15417
closed
static mappings for the ISC DHCP IPv4 server are ignored when the IP Address field is left blank
0%
Description
If I make a static DHCP mapping configuration where leave the IP address box blank (I want the IP given out to be dynamically allocated from my pool), the static lease is ignored by the DHCP server. When a client with a matching MAC address connects to the network, the static mapping I've made is ignored and the DHCP server generates a new one just like I hadn't ever configured the static mapping. Filling in the IP Address field causes the DHCP server to respect my static mapping configuration.
The static DHCP mapping UI for the IP Address entry box says:
"Address must be outside of any defined pools. If no IPv4 address is given, one will be dynamically allocated from a pool.
The same IP address may be assigned to multiple mappings."
Files
Updated by Jim Pingle 13 days ago
- Status changed from New to Not a Bug
Seems there is a bit of a misunderstanding. When you omit the IP address it's not a "static" mapping it's defining a client as known to DHCP for use with the "Deny Unknown Client" options. It does not define anything static for the client in terms of address.
You cannot define static mappings inside the DHCP pool with ISC DHCP, they are not reservations.
- https://docs.netgate.com/pfsense/en/latest/services/dhcp/ipv4.html#static-mappings
- https://docs.netgate.com/pfsense/en/latest/services/dhcp/mappings-in-pools.html
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