Spaces in hostnames?

Simon Hobson dhcp1 at
Tue Aug 8 22:14:31 UTC 2006

sf techguy wrote:
>I'm running an older build of dhcpd (2.0p15), embedded in our 
>snapgear firewall.
>If a dhcp client computer has a space in their computer hostname, then
>the hostname in dhcpd comes up blank. There are so many eople coming
>and going, there's no way for me to maunually enforce a 'no spaces in
>your computer name' policy.

Yep, it's a known problem.

>Is there a way to force this using the server? I.E., tell the server
>something like:
>'if the computer hostname contains a space, replace it with a `_` character?'
>or if there's a space in the hostname, don't assign an ip address?

None at all, certainly in version 2 which is rather old. IIRC in 
version 3 you end up with hostnames something like "jims%20pc" in DNS 
- but it's a long time since I've had to bother about it.

You might be able to do some expression that searches for a space and 
acts upon it in version 3, you'd have to read the man pages ("man 
dhcp-eval" in particular).


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