topic Re: How to clear DHCP leases on Gaia R80.10? in Firewall and Security Management

How to clear DHCP leases on Gaia R80.10?

Lukas_Nagy — Thu, 18 Jan 2018 11:59:04 GMT

Hello,

is there a way to release all DHCP leases from DHCP server running on Gaia R80.10? Is it enough to remove leases from

/var/lib/dhcp.leases‍

and reset DHCP process?

Thanks

Re: How to clear DHCP leases on Gaia R80.10?

PhoneBoy — Fri, 19 Jan 2018 23:12:40 GMT

I believe that is all that is required, yes.

Re: How to clear DHCP leases on Gaia R80.10?

G_W_Albrecht — Tue, 17 Aug 2021 07:38:11 GMT

See https://community.checkpoint.com/t5/SMB-Gateways-Spark/Release-ip/m-p/127110#M5535

for how to use dhclient to send a release message !

Re: How to clear DHCP leases on Gaia R80.10?

sloddo — Fri, 10 Dec 2021 17:46:19 GMT

That link discusses the ability to release a DHCP WAN IP address obtained by an SMB appliance. The question here is how to clear out leases of the DHCP server running on Gaia OS. Is it the same solution?

Re: How to clear DHCP leases on Gaia R80.10?

skandshus — Sat, 11 Dec 2021 00:07:17 GMT

I think you could just edit the .wan with .eth1 or .eth1.20 if you’re in a vlan.. would be an easy test either way..

Re: How to clear DHCP leases on Gaia R80.10?

G_W_Albrecht — Sat, 11 Dec 2021 08:42:57 GMT

The dhclient package is taken unchanged from RHEL 5.2, see Gaia R80.40 Hardening Specifications !

Re: How to clear DHCP leases on Gaia R80.10?

G_W_Albrecht — Mon, 13 Dec 2021 07:59:29 GMT

Did you test this yourself or just think it could work ? But why not use the standard linux dhclient command ?

Re: How to clear DHCP leases on Gaia R80.10?

sloddo — Mon, 13 Dec 2021 20:32:46 GMT

Appreciate the responses, but I'm still unclear on how dhclient can release IP's that have been leased out via the DHCPD server? I'm not talking about how to release a dhcp-assigned IP on a client.

Apologies if I'm being dense.