Unbound has a really good security history; better than MaraDNS. This is impressive in light of the fact that Unbound does a good deal more than MaraDNS; two of the CVE reports are about NSEC3 records, which neither MaraDNS nor Deadwood support.
NSD has a perfect security record (no CVE reports) so far.
Deadwood, MaraDNS 2.0's resolver, also has a perfect security record (no CVE reports)--but there is at least one security bug in older Deadwood releases which deserves a CVE report.
Note to self: Don't try to find a maintainer for DjbDNS. Anyone still interested in DjbDNS does not appear to be willing to acknowledge and take responsibility for its bugs. It's a shame too, since DjbDNS is becoming more and more irrelevant every day it's not actively maintained.
I'm pretty sure I have done a better job with Deadwood than with MaraDNS 1 with regards to security. Time will be the judge; it took five years after MaraDNS 1.0.00 was released for security bugs to start being reported; right now it's been a year and a half since Deadwood 3.0.01 came out (the first stable fully recursive release).
As I have said before, I'm really happy with what I have accomplished with MaraDNS. It's my mark on the world; it's my Wikipedia page and my 15 minutes of fame. I would not have the job I have today if it were not for MaraDNS.
All things have a beginning and an end. MaraDNS helped add diversity to the DNS server space when there were not enough open-source DNS servers out there, and it kept my skills relevant while teaching English in Mexico.
Deadwood is what MaraDNS 1 should have been. It's too bad I never had a chance to better merge it with MaraDNS' authoritative half.
When IPv6 finally really comes along, I might make the relevant updates to Deadwood to make sure it works well on an IPv6 network. I have no plans to add DNSSEC support; use Unbound or BIND instead if this is needed.
Deadwood still fills the need for a really tiny DNS server which is useful in places where Unbound is too big, such as low-cost routers. When that $20 router at Wal*Mart becomes powerful enough to run Unbound without breaking a sweat--it's only a matter of time before we get there--I'm not really sure what niche Deadwood or MaraDNS will fill.
It doesn't really matter. By the time that happens, I should be too busy raising kids and bringing the bacon home to worry about whether anyone still uses MaraDNS or Deadwood any more.
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