The port 67 and port 68 are used by DHCP and the DHCP clients.
DHCP is a layer-4 protocol, most commonly transported over UDP. UDP port number 67 is the destination port of a server, and UDP port number 68 is used by the client
DHCP listens for incoming on UDP 67 and send out on UDP 68 For 'well known' and 'registered' ports, you can check http://www.iana.org/assignments/port-numbers too. by gerson.freire@terra.com.br
DHCP and port 68 conquerorthecomputer.blogspot.com
they both run on the same port number
There are two ways to configure Ip address . One method is to do this manually .And other is to do this using dynamic host configuration protocol.
DHCP and port 68 conquerorthecomputer.blogspot.com
You need to make sure that your network adapter is configured to receive IP address automatically from DHCP server. Second make sure that your firewall allows incoming connections for DHCP port (usually port 61). And third make sure that the DHCP server is "allowed" to give your adapter an IP.
Those are the four phases of acquiring an IP address via DHCP. More information would be needed to indicate which of the 4 phases are being used at this point.
The steps for doing this areConnect N600 LAN port to 7700N LAN portDisable DHCP on N600Enable DHCP on 7700NManually give the N600 an ip in the 192.168.1.x range (outside the DHCP range)This will then put all devices in 192.168.1.x range, and be far simpler.
For a Windows based system you use the DHCP MMC snapin console. This is installed when the DHCP server service is installed. For Linux and Unix based systems you can edit the DHCP configuration file in /etc
Your network adapter must configured to receive IP address from DHCP server (default in Windows), also your firewall must allow connection to the port 67.