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K_montalvo
Advisor

How to clear DHCP Leases on Quantum 1600 SMB Appliance

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Hello experts,

How can i clear DHCP leases on 1600 SMB appliance?

Thanks

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1 Solution

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G_W_Albrecht
Legend
Legend

Still, this is the command:

# dhclient -h
Internet Systems Consortium DHCP Client 4.3.5
Copyright 2004-2016 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Unknown command: -h
Usage: dhclient [-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]
[-s server-addr] [-cf config-file]
[-df duid-file] [-lf lease-file]
[-pf pid-file] [--no-pid] [-e VAR=val]
[-sf script-file] [interface]*
exiting.

You have to find the correct lease file, of course...

CCSE CCTE SMB Specialist

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9 Replies
G_W_Albrecht
Legend
Legend

Here is the command to release WAN IP received from DHCP as a client:

https://community.checkpoint.com/t5/SMB-Gateways-Spark/Release-ip/m-p/125964#M5479

 

CCSE CCTE SMB Specialist
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K_montalvo
Advisor

Hello @G_W_Albrecht i tried the command referenced on the link above but did not worked. I did an ls -l and confirmed the file is different. I beleive the above command would worked on a regular Quantum Security Gateway. Also tried reaching out to TAC and did not helped. I did a work around configuring a static ip and disabled the dhcp server on the Local Network LAN SW on the SMB and worked. But how difficult is to have and option on the GUI or Mobile Watch Tower APP that can clear DHCP leases? Where can i share this idea if not been already contemplated?

Thanks!

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the_rock
Champion
Champion

Hey brother,

You can always submit RFE for that, but I am a bit surprised that watch tower app does not have that option...hm. I have an app on my iphone, so will try it later and see if there is a way to do this via the app.

K_montalvo
Advisor

Ok brother let me know if you find something!

the_rock
Champion
Champion

For you my friend, no charge to check ; - )

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the_rock
Champion
Champion

Sorry man, I looked everywhere on the app, cant find option to clear dhcp leases anywhere...

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G_W_Albrecht
Legend
Legend

WatchTower does not have the option and neither does WebGUI ! But dhclient works the same way with every Linux, for the switch, leases are kept here:

/var/dhclient.leases

 

CCSE CCTE SMB Specialist
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G_W_Albrecht
Legend
Legend

Still, this is the command:

# dhclient -h
Internet Systems Consortium DHCP Client 4.3.5
Copyright 2004-2016 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Unknown command: -h
Usage: dhclient [-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]
[-s server-addr] [-cf config-file]
[-df duid-file] [-lf lease-file]
[-pf pid-file] [--no-pid] [-e VAR=val]
[-sf script-file] [interface]*
exiting.

You have to find the correct lease file, of course...

CCSE CCTE SMB Specialist
K_montalvo
Advisor

Thanks!

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