ISC DHCP 4.4 Manual Pages - dhcpd.conf - ISC DHCP 4.4
Requests are on UDP reversed port 68 & Server replies on UDP reversed port 67 If the above is right, then you can allow those ports on Linux(Ubuntu) with: sudo iptables -A OUTPUT -p udp --dport 68 DHCP Relay Agent - TechLibrary - Juniper Networks Understanding DHCP Relay Agent Operation, Minimum DHCP Relay Agent Configuration, Configuring DHCP Relay Agent, Configuring a DHCP Relay Agent on EX Series Switches, Configuring DHCP Smart Relay (Legacy DHCP Relay), Disabling Automatic Binding of Stray DHCP Requests, Using Layer 2 Unicast Transmission instead of Broadcast for DHCP Packets, Changing the Gateway IP Address (giaddr) Field … Ports to be used for pxe boot
The Dynamic Host Configuration Protocol (DHCP) provides a framework for passing configuration information to hosts on a TCP/IP network. A DHCP client is an Internet host using DHCP to obtain configuration parameters such as an IP address.
port number 137 is used for BIOS Name service, 138 for NetBIOS-dgm, 139 for NetBIOS Datagram service: 22: Used for SSH remote login protocol, SSH is short form of Secure Shell: 67, 68: The port number 68 is used for DHCP client and 67 is used for DHCP server : 53: DNS (Domain Name System) 69: TFTP (Trivial File Transfer Protocol) 70: Gopher Dynamic Host Configuration Protocol DHCP, How DHCP work
Jan 24, 2019
Aug 27, 2019 ISC DHCP 4.4 Manual Pages - dhcpd.conf - ISC DHCP 4.4