Re: dhcp script!

[Walt Scrivens <walts () gate net>]

Ron,

I ran the scan with Wireshark. there were only 5 packets exchanged - 2  
malformed packets from me, followed by a DCHP DISCOVER, then a DHCP  
OFFER from the router, and then "destination unreachable" when I tried  
to reply to the router.  The capture file is attached, and here is the  
nmap output:
****************
sh-3.2# nmap --send-ip -d -sU -p67 -PN --script=dhcp-inform --script- 
args=dhcptype=DHCPDISCOVER 192.168.1.1

Starting Nmap 5.00 ( http://nmap.org ) at 2009-09-08 19:23 EDT
--------------- Timing report ---------------
  hostgroups: min 1, max 100000
  rtt-timeouts: init 1000, min 100, max 10000
  max-scan-delay: TCP 1000, UDP 1000, SCTP 1000
  parallelism: min 0, max 0
  max-retries: 10, host-timeout: 0
  min-rate: 0, max-rate: 0
---------------------------------------------
NSE: Loaded 1 scripts for scanning.
Warning: Unable to open interface vmnet8 -- skipping it.
Warning: Unable to open interface vmnet1 -- skipping it.
mass_rdns: Using DNS server 208.67.222.222
mass_rdns: Using DNS server 208.67.220.220
Initiating Parallel DNS resolution of 1 host. at 19:23
mass_rdns: 0.11s 0/1 [#: 2, OK: 0, NX: 0, DR: 0, SF: 0, TR: 1]
Completed Parallel DNS resolution of 1 host. at 19:23, 0.07s elapsed
DNS resolution of 1 IPs took 0.11s. Mode: Async [#: 2, OK: 0, NX: 1,  
DR: 0, SF: 0, TR: 1, CN: 0]
Initiating UDP Scan at 19:23
Scanning 192.168.1.1 [1 port]
Packet capture filter (device en1): dst host 192.168.1.144 and (icmp  
or ((tcp or udp or sctp) and (src host 192.168.1.1)))
Completed UDP Scan at 19:23, 2.01s elapsed (1 total ports)
Overall sending rates: 0.99 packets / s, 27.81 bytes / s.
NSE: Script scanning 192.168.1.1.
NSE: Starting runlevel 1 scan
Initiating NSE at 19:23
NSE: NSE Script Threads (1) running:
NSE: Starting dhcp-inform against 192.168.1.1:67.
NSE: Finished dhcp-inform against 192.168.1.1:67.
Completed NSE at 19:23, 3.00s elapsed
NSE: Script Scanning completed.
Host 192.168.1.1 is up, received user-set.
Scanned at 2009-09-08 19:23:22 EDT for 5s
Interesting ports on 192.168.1.1:
PORT   STATE         SERVICE REASON
67/udp open|filtered dhcps   no-response
Final times for host: srtt: -1 rttvar: -1  to: 1000000

Read from /usr/local/share/nmap: nmap-services.
Nmap done: 1 IP address (1 host up) scanned in 5.26 seconds
           Raw packets sent: 2 (56B) | Rcvd: 0 (0B)
sh-3.2#

****************
Walt

Attachment: dhcp-inform.cap
Description:

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