[Dnsmasq-discuss] dhcp-range but no port 67

/dev/rob0 rob0 at gmx.co.uk
Sat Jun 29 00:11:07 BST 2013

On Fri, Jun 28, 2013 at 03:45:02PM +0200, andreas graeper wrote:
> dnsmasq 2.48 on centos64 (standard-repos)
> i set dhcp-range=,,,12h
> but there is no port 67 open (nmap)

How did you test this? By default nmap scans TCP; DHCP is UDP.

root at chestnut:~# nmap -sU -p52-54,66-68

Starting Nmap 6.01 ( http://nmap.org ) at 2013-06-28 18:08 CDT
Nmap scan report for chestnut.rob0.nodns4.us (
Host is up (0.0087s latency).
52/udp closed        xns-time
53/udp open          domain
54/udp closed        xns-ch
66/udp closed        sqlnet
67/udp open|filtered dhcps
68/udp closed        dhcpc

Nmap done: 1 IP address (1 host up) scanned in 1.36 seconds
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