Mikrotik DHCP Option 43 Tutorial ~ Binary Heartbeat
what is the difference between DHCP scope options 004 and Apr 21, 2010 DHCP Scope Options Guide for IP Clocks - Valcom Inc These options are outlined below. Due to the variety of DHCP servers in use, it is beyond the scope of this document to provide instructions on how to specify these options in a particular server. Option 42 NTP Servers are listed by IP address using option 42. This is a standard option defined in RFC 2132. Option 100 or Option 101 Unlocking Sophos UTM DHCP Capabilities Setting the Start range and End range allows you to exclude certain IPs.Here, I excluded the first 10 IP addresses for non-DHCP clients in addition to excluding the last 10 IPs in the range. Because it is a RED, the DNS server would be itself by default, but if your rules permit, you can specify the DNS servers directly as I have done here.. The default gateway for this network segment is the Configure Windows DHCP for Avaya IP telephones | McGearyTech
Option 82. The DHCP relay agent information option (option 82 in RFC 3046) helps protect the FortiGate against attacks such as spoofing (forging) of IP addresses and MAC addresses, and DHCP IP address starvation. This option is disabled by default. However, when dhcp-relay-service is enabled, dhcp-relay-agent-option becomes enabled.
IANA: BOOTP and DHCP options. This option specifies a list of the NTP servers available to the client by IP address. The servers SHOULD appear in the list in order of preference. Dynamic Host Configuration Protocol (DHCP) and Bootstrap
These options are outlined below. Due to the variety of DHCP servers in use, it is beyond the scope of this document to provide instructions on how to specify these options in a particular server. Option 42 NTP Servers are listed by IP address using option 42. This is a standard option defined in RFC 2132. Option 100 or Option 101
RFC 5908 NTP Server Option for DHCPv6 June 2010 6.Security Considerations This option could be used by an intruder to advertise the address of a malicious NTP server or SNTP server and adversely affect the clock of clients on the network. The consequences of such an attack can be critical, because many security protocols depend on time synchronization to run their algorithms. OpenWrt Project: DNS and DHCP configuration examples