Akamai awesomeness and Opendns lameness

Akamai footprint awesomeness.

My IP address.

sandipb@pluto:~$ wget -O - -q http://www.whatismyip.com/automation/n09230945.asp;echo 122.167.0.79 sandipb@pluto:~$ host 122.167.0.79 79.0.167.122.in-addr.arpa domain name pointer ABTS-KK-Dynamic-079.0.167.122.airtelbroadband.in.

Akamai CDN for downloading Adobe AIR.

sandipb@pluto:~$ host airdownload.adobe.com airdownload.adobe.com is an alias for airdownload.wip3.adobe.com. airdownload.wip3.adobe.com is an alias for airdownload.adobe.com.edgesuite.net. airdownload.adobe.com.edgesuite.net is an alias for a1396.g.akamai.net. a1396.g.akamai.net has address 203.101.62.10 a1396.g.akamai.net has address 203.101.62.11 sandipb@pluto:~$ host 203.101.62.10 10.62.101.203.in-addr.arpa domain name pointer dsl-KK-static-010.62.101.203.airtelbroadband.in.

I am downloading from a server co-located at my ISP. Industry standard in US, but I feel really great for this to be happening in India. :)

Imagine. Download server in India, three hops, 25 ms away!

sandipb@pluto:~$ mtr -i 10 203.101.62.10 My traceroute [v0.73] pluto (0.0.0.0) Thu Apr 23 01:41:38 2009 Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. 192.168.1.1 0.0% 1 1.1 1.1 1.1 1.1 0.0 2. ABTS-KK-Dynamic-001.0.167.122.airtelbroadband.in 0.0% 1 25.4 25.4 25.4 25.4 0.0 3. ABTS-KK-Static-173.32.166.122.airtelbroadband.in 0.0% 1 24.9 24.9 24.9 24.9 0.0 4. ABTS-KK-static-008.32.144.59.airtelbroadband.in 0.0% 1 39.0 39.0 39.0 39.0 0.0 5. dsl-KK-static-010.62.101.203.airtelbroadband.in 0.0% 1 25.0 25.0 25.0 25.0 0.0

Lesson learnt: OpenDNS hurts all this goodness

Thank goodness, I moved off opendns today. This is what opendns was giving me all this past year that I was using it.

sandipb@pluto:~$ dig @208.67.222.222 airdownload.adobe.com ... ;; ANSWER SECTION: airdownload.adobe.com. 85521 IN CNAME airdownload.wip3.adobe.com. airdownload.wip3.adobe.com. 218 IN CNAME airdownload.adobe.com.edgesuite.net. airdownload.adobe.com.edgesuite.net. 20721 IN CNAME a1396.g.akamai.net. a1396.g.akamai.net. 20 IN A 204.2.160.24 a1396.g.akamai.net. 20 IN A 204.2.160.34 sandipb@pluto:~$ host 204.2.160.24 24.160.2.204.in-addr.arpa domain name pointer a204-2-160-24.deploy.akamaitechnologies.com. sandipb@pluto:~$ ping -c 1 204.2.160.24 PING 204.2.160.24 (204.2.160.24) 56(84) bytes of data. 64 bytes from 204.2.160.24: icmp_seq=1 ttl=54 time=259 ms

A download server 260ms and 11 hops away in US.

Using opendns is breaking anything which uses CDN. Now I have used opendns for a while and it is nice at its work. But believe me, we spend more time downloading videos and text than querying DNS, and if you have a DNS cache at home (like djbdns) or even your ISP’s DNS, it works a lot as well.

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