Cisco Umbrella DNS
208.67.222.222
208.67.220.220
Optus DNS
61.88.88.88
TPG DNS
203.12.160.35
203.12.160.36
Time Server
au.pool.ntp.org
Testing Sites
Mail Test Site
Mail Black list check
Understanding DHCP Relay Agents
Google DIG
Crypto Tool (Nartac Software)
TFTP/DHCP/SYSLOG Server
