One site don't return any thing. Just a blank white page. This site is among top 100 Malaysia sites and it's just return a blank page that is not right. Using dig command I found this result.
Does Tmnet has the ability to block any websites blanket block to all Tmnet users?
Does Jaring and any other ISP's have this ability?
This type of block is what we call DNS blackhole or blacklist. It's can be used for stopping SPAM or stopping people from accessing websites.
Refer to Djbdns for DNS blackhole.
[root@ ~]# dig www. .com
; <<>> DiG 9.3.3rc2 <<>> www. .com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 20448 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 ;; QUESTION SECTION: ;www. .com. IN A ;; AUTHORITY SECTION: .com. 2831 IN SOA ns1.blocked. blocked.tm.net.my. 1 900 600 86400 3600 ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Sat May 10 03:09:50 2008 ;; MSG SIZE rcvd: 97 [root@~]#