Bootstrap Protocol Client

BOOTPC (Bootstrap Protocol Client) is a network protocol used by clients to obtain an IP address and other configuration details from a BOOTP server. It operates on port 68 and is essential for network initialization. BOOTPC is often used in environments where devices need to be dynamically assigned IP addresses.

What is Bootstrap Protocol Client

BOOTPC, or Bootstrap Protocol Client, is a network protocol that allows clients to obtain an IP address and other essential network configuration details from a BOOTP server. This protocol is crucial for the initial configuration of network devices, especially in environments where devices need to be dynamically assigned IP addresses. BOOTPC operates on port 68, while the server side of the protocol, BOOTPS, operates on port 67.

Originally developed in the 1980s, BOOTP was designed to enable diskless workstations to discover their IP address, the address of a server, and the name of a file to be loaded into memory to boot the machine. Over time, BOOTP has largely been replaced by the more advanced DHCP (Dynamic Host Configuration Protocol), but it is still in use in some legacy systems and specific network configurations.

BOOTPC is particularly useful in scenarios where devices need to be configured automatically without manual intervention. This includes environments like large enterprise networks, data centers, and even some home networks. The protocol ensures that devices can join the network with minimal configuration, reducing the administrative overhead and potential for errors.

Bootstrap Protocol Client runs on TCP and UDP port 68 and is official IANA port.

Security risk

If port 68 is open and the BOOTPC service is running, it could be exploited by attackers to gain unauthorized access to network configuration details. This could lead to network disruptions or unauthorized devices joining the network. Proper firewall rules and network segmentation are essential to mitigate these risks.

In our UFW tutorial you can follow instructions how you can configure UFW to close port 68. Use StackChanges to monitor if the Bootstrap Protocol Client port is closed and stays closed. StackChanges will send an alert if port 68 is open again.