Google's free DNS Service 8.8.8.8

Zhou haihan/Wen

 

Google launched two well-remembered DNS servers after receiving a message from Gu O. That is

 

8.8.8.8

8.8.4.4

 

Tested and available by myself. Some people say that 4.4.4 and 4.3.2.1 are the same. After my test, the two IP addresses can be pinged but cannot be resolved by DNS.

 

Below is the test result:

Zhouhh @ zhhofs :~ $ Ping 8.8.8.8 <br/> Ping 8.8.8.8.8 (8.8.8.8) 56 (84) bytes of data. <br/> 64 bytes from 8.8.8.8: icmp_seq = 1 TTL = 240 time = 200 ms <br/> 64 bytes from 8.8.8.8.8: icmp_seq = 2 TTL = 240 time = 84.7 Ms <br/> ^ C <br/> --- 8.8.8.8 Ping statistics --- <br/> 2 packets transmitted, 2 received, 0% packet loss, time 1000 ms <br/> RTT min/AVG/max/mdev = 84.771/142.731/200.691/57.960 Ms <br/> zhouhh @ zhhofs :~ $ Ping 8.8.4.4 <br/> Ping 8.8.4.4 (8.8.4.4) 56 (84) bytes of data. <br/> 64 bytes from 8.8.4.4: icmp_seq = 1 TTL = 240 time = 111 Ms <br/> 64 bytes from 8.8.4.4: icmp_seq = 2 TTL = 240 time = 113 Ms <br/> ^ C <br/> --- 8.8.4.4 Ping statistics --- <br/> 2 packets transmitted, 2 received, 0% packet loss, time 1001 Ms <br/> RTT min/AVG/max/mdev = 111.370/112.358/113.346/0.988 Ms <br/> zhouhh @ zhhofs :~ $ Ping 4.3.2.1 <br/> Ping 4.3.2.1 (4.3.2.1) 56 (84) bytes of data. <br/> 64 bytes from 4.3.2.1: icmp_seq = 1 TTL = 240 time = 107 Ms <br/> 64 bytes from 4.3.2.1: icmp_seq = 2 TTL = 240 time = 102 Ms <br/> ^ C <br/> --- 4.3.2.1 Ping statistics --- <br/> 2 packets transmitted, 2 received, 0% packet loss, time 1001 Ms <br/> RTT min/AVG/max/mdev = 102.059/104.628/107.198/2.589 Ms <br/> zhouhh @ zhhofs :~ $ NSLookup 8.8.8.8 <br/> server: 8.8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> non-Authoritative Answer: <br/> 8.8.8.8.in-ADDR. arpaname = google-public-dns-a.google.com. <br/> authoritative answers can be found from: <br/> zhouhh @ zhhofs :~ $ NSLookup 8.8.4.4 <br/> server: 8.8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> non-Authoritative Answer: <br/> 4.4.8.8.in-ADDR. arpaname = google-public-dns-b.google.com. <br/> authoritative answers can be found from: <br/> zhouhh @ zhhofs :~ $ NSLookup 4.4.4 <br/> server: 8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> ** server can't find 4.4.4.4.4.4.in-ADDR. ARPA.: nxdomain <br/> zhouhh @ zhhofs :~ $ NSLookup 4.3.2.1 <br/> server: 8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> ** server can't find 1.2.3.4.in-ADDR. arpa: servfail <br/> zhouhh @ zhhofs :~ $ NSLookup 1.2.3.4 <br/> server: 8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> ** server can't find 4.3.2.1.in-ADDR. ARPA.: nxdomain <br/> zhouhh @ zhhofs :~ $ NSLookup <br/> server 8.8.8.8 <br/> default server: 8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> set type = A <br/> Google.com <br/> server: 8.8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> non-Authoritative Answer: <br/> name: Google.com <br/> address: 74.125.53.100 <br/> name: Google.com <br/> address: 74.125.67.100 <br/> name: Google.com <br/> address: 74.125.45.100 <br/> sohu.com <br/> server: 8.8.8.8 <br/> address: 8.8.8.8 #53 <br/> non-Authoritative Answer: <br/> name: sohu.com <br/> address: 61.135.181.176 <br/> name: sohu.com <br/> address: 61.135.181.175 <br/> server 4.4.4.4 <br/> default server: 4.4.4.4 <br/> address: 4.4.4.4 #53 <br/> set type A <br/> *** invalid option: type <br/> set type = A <br/> *** invalid option: type <br/> set type = A <br/> Google.com <br/> ^ C <br/> resolution failed, timeout </P> <p> zhouhh @ zhh64 :~ $ NSLookup <br/> server 4.3.2.1 <br/> default server: 4.3.2.1 <br/> address: 4.3.2.1 #53 <br/> sohu.com <br/> Server: 4.3.2.1 <br/> address: 4.3.2.1 #53 </P> <p> non-Authoritative Answer: <br/> name: sohu.com <br/> address: 61.135.181.176 <br/> name: sohu.com <br/> address: 61.135.181.175 <br/> set type A <br/> *** invalid option: type <br/> set type = A <br/> *** invalid option: Type <br/> set type = A <br/> Soh U.com <br/> server: 4.3.2.1 <br/> address: 4.3.2.1 #53 </P> <p> non-Authoritative Answer: <br/> Name: sohu.com <br/> address: 61.135.181.175 <br/> name: sohu.com <br/> address: 61.135.181.176 <br/> server 4.4.4.4 <br/> Default Server: 4.4.4.4 <br/> address: 4.4.4.4 #53 <br/> set type = A <br/> sohu.com <br/> ^ C <br/> 4.4.4.4, 4.3.2.1 is accessible.

8.8.8.8 and 8.8.4.4 are available.

After additional tests, 4.3.2.1 is available.

 

8.8.8.8, 8.8.4.4, and 4.3.2.1 do not worry about Domain Name kidnapping. However, 8.8.8.8, 8.8.4.4, and 4.3.2.1 may be banned by gFW.

 

PS: One night later, I solved the network problem for a girl, assigned an IP address, and assigned 8.8.8.8 to the DNS. As a result, she asked, "you just need to configure one DNS, right ?" 8.8.8.8 it's so easy to remember that we don't believe it.