I've seen this before with companies that provide content for people in China. The last company I talked to about this used proxy servers and had people hosting content all over the country(US)to avoid the filtering/blocking by the Chinese government. It seemed to work pretty well. -Mike -----Original Message----- From: travis.alexander@xxxxxxxxxxx [mailto:travis.alexander@xxxxxxxxxxx] Sent: Thursday, August 05, 2004 10:37 AM To: zhenshi99@xxxxxxxxx; bugtraq@xxxxxxxxxxxxxxxxx Subject: RE: International DNS compromise? I got six different results, meaning six different server IP's. 1. 64.33.99.47 2. 207.12.88.98 3. 208.56.31.43 4. 216.221.188.182 5. 65.160.219.113 6. 65.104.202.252 All US owned IP addresses. Yes this is very interesting. So what does this mean, or potentially mean...? Travis. -----Original Message----- From: Zhen Shi [mailto:zhenshi99@xxxxxxxxx] Sent: Wednesday, August 04, 2004 10:11 PM To: bugtraq@xxxxxxxxxxxxxxxxx Subject: International DNS compromise? Dear all, Recently I noticed something fishy in the DNS system between US and China. First, any IPs, dead or live, in China will respond to your DNS query for some domains. For example (screen shot with some clean-up and comments): C:\>nslookup > server 210.77.0.0 <=== pick a random IP in China Default Server: [210.77.0.0] Address: 210.77.0.0 > www.rfa.org Server: [210.77.0.0] Address: 210.77.0.0 Non-authoritative answer: Name: www.rfa.org Address: 203.105.1.21 <=== you got response!!!! Second, every time the response is different: > www.rfa.org Server: [210.77.0.0] Address: 210.77.0.0 Non-authoritative answer: Name: www.rfa.org Address: 64.66.163.251 > www.rfa.org Non-authoritative answer: Name: www.rfa.org Address: 64.33.99.47 > www.rfa.org Non-authoritative answer: Name: www.rfa.org Address: 128.121.126.139 Third, you can even get response from non-exist host names: > nosuchhost.rfa.org Server: [210.77.0.0] Address: 210.77.0.0 Non-authoritative answer: Name: nosuchhost.rfa.org Address: 65.104.202.252 > nosuchhost.rfa.org Non-authoritative answer: Name: nosuchhost.rfa.org Address: 64.33.99.47 What on earth is really going on here? It seems the DNS system is messed up between US and China, and its integrity is compromised. People can be unknowingly redirected to any where ... --Zhen __________________________________ Do you Yahoo!? Take Yahoo! Mail with you! Get it on your mobile phone. http://mobile.yahoo.com/maildemo
