Christopher X. Candreva wrote:
This thread on Trojan.JS.RunMe had me thinking: Hourly virus updates is better than any of the commercial virus scanners, but obviously still has issues, especially since a bunch of us obviously submitted updates that had already been entered. I gather from these posts that the virusdb's actually have some form of version number.This could actualy be easily accomplished also by attaching a soa record to a zone ... for example
dbversion.clamav.net
Incrementing the serial for that should be trivial enough.....writing a mechanism to rapidly query against it and then to invoke a freshclam is left as an exercise to the reader.
Presumably then the lists of Nameservers for that particular zone would be expanded to about 10 or more. Notification from whatever master zone server could be trivialy accomplished on that.
We should probably consider that the load balancing of all those end users/isp's DNS resolvers may not be all it can be, particularly the selection of which nameserver to talk to out of many for a particular zone.
Anyways I did a dig .... Arent CNAMEs that Point to CNAMEs contrary to RFC?
Might that be behind the infrequent dns resolution complaints?
Also... Is there any single name that covers ALL mirrors?
Also.... Any insight as to how the { presumably dynamic } selection to alias the db-local to db.america is done?
c:\Documents and Settings\joe.JOE.000>dig database.clamav.net
; <<>> DiG 9.2.3rc3 <<>> database.clamav.net ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 41 ;; flags: qr rd ra; QUERY: 1, ANSWER: 15, AUTHORITY: 5, ADDITIONAL: 2
;; QUESTION SECTION: ;database.clamav.net. IN A
;; ANSWER SECTION: database.clamav.net. 5 IN CNAME db.local.clamav.net. db.local.clamav.net. 7200 IN CNAME db.america.clamav.net. db.america.clamav.net. 5 IN A 128.121.60.235 db.america.clamav.net. 5 IN A 196.40.71.226 db.america.clamav.net. 5 IN A 199.239.233.95 db.america.clamav.net. 5 IN A 200.68.106.39 db.america.clamav.net. 5 IN A 24.244.193.21 db.america.clamav.net. 5 IN A 38.136.139.7 db.america.clamav.net. 5 IN A 64.18.103.6 db.america.clamav.net. 5 IN A 64.69.64.158 db.america.clamav.net. 5 IN A 65.75.154.69 db.america.clamav.net. 5 IN A 65.77.42.207 db.america.clamav.net. 5 IN A 66.139.75.171 db.america.clamav.net. 5 IN A 67.18.205.218 db.america.clamav.net. 5 IN A 69.93.108.98
;; AUTHORITY SECTION: clamav.net. 7200 IN NS ns5.clamav.net. clamav.net. 7200 IN NS ns1.oltrelinux.com. clamav.net. 7200 IN NS ns2.clamav.net. clamav.net. 7200 IN NS ns3.clamav.net. clamav.net. 7200 IN NS ns4.clamav.net.
;; ADDITIONAL SECTION: ns1.oltrelinux.com. 38516 IN A 194.242.226.43 ns5.clamav.net. 153717 IN A 80.69.66.9
;; Query time: 671 msec ;; SERVER: 64.95.32.37#53(64.95.32.37) ;; WHEN: Tue Aug 10 16:40:04 2004 ;; MSG SIZE rcvd: 429
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