[SOLVED] My DHCP server responds to requests, but port 67
Jul 20, 2013 14.04 - Setting Options 66 and 67 for ISC DHCP Server nano -w /etc/dhcp/dhcpd.conf and to add the following entries for activating the option 66 and 67. #option 66 option tftp-server-name "w.x.y.z"; #option 67 option bootfile-name "test.cfg"; Then to restart the DHCP Server. sudo service isc-dhcp-server restart What is DHCP and what is its port number? - Quora DHCP is the Dynamic Host Configuration Protocol. It’s used on local networks (wired and wireless) to dynamically assign IP addresses to client machines upon request. It also has the ability to provide various other parameters to client machines, l BOOTP (Bootstrap Protocol) - NetworkLessons.com The host sends a BOOTP request and uses UDP source port 68 and destination port 67. This packet is a broadcast so everything in the broadcast domain receives it. On our network, we have a BOOTP server listening on UDP port 67: The server sees the broadcast packet from the host and since it’s listening on UDP port 67, it processes the packet.
Port Number Requirements for DHCP Firewall Filters
You can run a capture (wireshark) to see the whole dhcp process or if not able to do a capture, you can do a span and capture udp packets for ports 67 and 68. Thanks. Francesco. PS: Please don't forget to rate and select as validated answer if this answered your question. 0 Helpful.
Jan 27, 2018
Oct 20, 2014 Overview of common TCP and UDP Default Ports DHCP basically makes use of 2 ports; Port 67 and Port 68. UDP Port 67 performs the task of accepting address requests from DHCP and sending the data to the server. On the other hand, UDP Port 68 performs the task of responding to all the requests of DHCP and forwarding data to the client. POP3-110