There may be more than one DHCP server in a network; care should be taken when setting several DHCP servers, to prevent dynamic/etc address space overlapping and subsequent IP address conflicts.
The following could start happen if there are conflicts in DHCP servers settings:
However, the above, in case you are sure your DHCP service is set up properly, may also be a sign of a rogue (unauthorized) DHCP server running within your network. Primary goal of such a server is providing false DNS addresses, thus redirecting connections to dangerous locations; possible consequences may be virus and other malware distribution - they can be detected by malware/antivirus scanners in you network.
The traits above should not be neglected; also, proper monitoring of the crucial resources and related traffic might also be a good idea.
The following could start happen if there are conflicts in DHCP servers settings:
- workstations begin to lose their IP addresses, other settings (DNS, for example)
- workstations report IP addresses conflicts
- DHCP-related traffic grows significantly (UDP ports 67 and 68)
However, the above, in case you are sure your DHCP service is set up properly, may also be a sign of a rogue (unauthorized) DHCP server running within your network. Primary goal of such a server is providing false DNS addresses, thus redirecting connections to dangerous locations; possible consequences may be virus and other malware distribution - they can be detected by malware/antivirus scanners in you network.
The traits above should not be neglected; also, proper monitoring of the crucial resources and related traffic might also be a good idea.
