DNS report for zone “drexel-research.net”
Hostmaster for zone drexel-research.net is: dunet-admin@noc.drexel.eduIP settings (as seen from noc2.drexel.edu)
info
You have 2 nameservers.
info
You have nameservers in several C-Nets, that's good!
Mail settings (as seen from noc2.drexel.edu)
warn
You don't have any mailservers set up. This is OK if you don't use any mail for the domain.
Zone as seen from “noc1.drexel.edu” [144.118.24.20]
info
noc1.drexel.edu is running the latest version of the zone(2001051100).
info
SOA serial seems to follow good standards. We recommend it to be in YYYYMMDDxx-format, which yours appear to be. This would suggest that your zone was last updated at 2001-05-11, and has been updated 1 time on that day.
info
This nameserver does not allow zone transfers.
error
Your nameserver supports recursion. This is really bad to have activated on public nameservers since they can then be used for amplification of Denial Of Service attacks! You can find more information about it here: http://www.us-cert.gov/reading_room/DNS-recursion033006.pdf
warn
Your nameserver doesn't respond to queries via TCP.
info
Your nameserver responds authorative for the zone.
warn
SOA Refresh value of 300 is too low. RFC1912 suggests it should be between 1200 and 43200 seconds. This sets how often slaves should refresh the zone from the master.
info
Your SOA retry value of 30 minutes is good.
warn
A SOA expiry value of 3600000 is quite high. You should consider lowering this to a value inbetween 2 and 4 weeks. This value defines for how long the zone should be valid when the slaves are unable to reach the master.
warn
A minimum TTL (Time To Live) of 86400 is quite high. RFC2308 recommends a minimum TTL between 1-3 hours.
Zone as seen from “noc2.drexel.edu” [144.118.24.10]
info
noc2.drexel.edu is running the latest version of the zone(2001051100).
info
SOA serial seems to follow good standards. We recommend it to be in YYYYMMDDxx-format, which yours appear to be. This would suggest that your zone was last updated at 2001-05-11, and has been updated 1 time on that day.
info
This nameserver does not allow zone transfers.
error
Your nameserver supports recursion. This is really bad to have activated on public nameservers since they can then be used for amplification of Denial Of Service attacks! You can find more information about it here: http://www.us-cert.gov/reading_room/DNS-recursion033006.pdf
warn
Your nameserver doesn't respond to queries via TCP.
info
Your nameserver responds authorative for the zone.
warn
SOA Refresh value of 300 is too low. RFC1912 suggests it should be between 1200 and 43200 seconds. This sets how often slaves should refresh the zone from the master.
info
Your SOA retry value of 30 minutes is good.
warn
A SOA expiry value of 3600000 is quite high. You should consider lowering this to a value inbetween 2 and 4 weeks. This value defines for how long the zone should be valid when the slaves are unable to reach the master.
warn
A minimum TTL (Time To Live) of 86400 is quite high. RFC2308 recommends a minimum TTL between 1-3 hours.