cannot ping to 8.8.8.8 or 8.8.4.4

[Rick]

I am in the Philippines and this morning my Google DNS stopped
working. Ping does not find either server. See traceroute:

Traceroute has started…

traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 72 byte packets
1 192.168.5.1 (192.168.5.1) 3.778 ms 1.036 ms 0.922 ms
2 112.210.128.1.pldt.net (112.210.128.1) 31.127 ms 34.580 ms
34.981 ms
3 119.93.254.245 (119.93.254.245) 22.814 ms 22.711 ms 23.519 ms
4 210.213.131.46.static.pldt.net (210.213.131.46) 25.385 ms 23.813
ms 23.935 ms
5 ge-10-1-0.spc-gw2.n4i.pldt.net (210.213.131.21) 23.576 ms 22.433
ms 23.888 ms
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *

OpenDNS is fine. See traceroute:

Traceroute has started…

traceroute to 208.67.220.220 (208.67.220.220), 64 hops max, 72 byte
packets
1 192.168.5.1 (192.168.5.1) 3.804 ms 0.920 ms 0.879 ms
2 112.210.128.1.pldt.net (112.210.128.1) 33.491 ms 42.377 ms
27.438 ms
3 119.93.254.241 (119.93.254.241) 22.225 ms 23.981 ms 23.268 ms
4 210.213.131.34.static.pldt.net (210.213.131.34) 24.916 ms 25.080
ms 33.073 ms
5 210.213.128.42.static.pldt.net (210.213.128.42) 23.898 ms 22.894
ms 23.452 ms
6 210.213.129.21.static.pldt.net (210.213.129.21) 30.269 ms 25.037
ms 24.861 ms
7 210.213.128.25.static.pldt.net (210.213.128.25) 22.761 ms 23.671
ms 23.875 ms
8 210.213.130.137.static.pldt.net (210.213.130.137) 24.168 ms
24.171 ms 23.168 ms
9 pos1-0-0.ig4.sac1.alter.net (152.179.125.129) 259.508 ms 304.871
ms 308.752 ms
10 0.ge-3-2-0.xt1.sac1.alter.net (152.63.48.118) 305.494 ms 308.566
ms 307.220 ms
11 0.so-7-0-0.xl1.pao1.alter.net (152.63.54.133) 307.396 ms 306.920
ms 307.063 ms
12 pos6-0.gw6.pao1.alter.net (152.63.55.9) 307.306 ms 306.855 ms
227.065 ms
13 65.203.37.46 (65.203.37.46) 35.921 ms 282.917 ms 331.262 ms
14 resolver2.opendns.com (208.67.220.220) 305.112 ms 307.132 ms
206.642 ms

Having fast DNS is critical to my work and right now I'm not able to
work.

Please help.

[Paul S. R. Chisholm]

Sorry for the problems you're having, Rick. You probably also can't
successfully run:

nslookup -debug www.google.com. 8.8.8.8

though it's worth a try.

If you can't get to 8.8.8.8 or 8.8.4.4, please talk to someone at your
ISP about that. They may have deliberately blocked access, or this may
be caused by some network glitch that can be fixed.

Hope this helps. --PSRC

> --
> ========================================================
> You received this message because you are subscribed to the Google
> Groups "public-dns-discuss" group.
> To post to this group, send email to public-dn...@googlegroups.com
> To unsubscribe from this group, send email to
> public-dns-disc...@googlegroups.com
> For more options, visit this group at
> http://groups.google.com/group/public-dns-discuss?hl=en
> For more information on Google Public DNS, please visit
> http://code.google.com/speed/public-dns
> ========================================================

[Shen Wan]

Tarikul,

If you cannot ping 8.8.8.8 or nslookup -debug www.google.com. 8.8.8.8, please talk to someone at your ISP or your local network administrator about that. They may have deliberately blocked access, or this may be caused by some network glitch that can be fixed.

Shen

On Tuesday, February 26, 2013 9:36:10 AM UTC-5, Tarikul Islam wrote:

Dear friends,

I have a peculiar problem like this. I am a system engineer of an private co. 

For the problem i have access permission only after router. The accessible equipment only switch and computer.

i discuss for a vlan like 1609, on my network

1. private ip network: 192.168.172.192/29

2. gateway: 192.168.172.193

3. DNS: 8.8.8.8

             8.8.4.4

4. Gateway ping successful with 0% packet loss.

5. Speed maximized to 512kbps

6. 10 vlan on a port, like same speed

7. connection between switch and router multi-mode fiber media, by a port.

8. Fiber distance 6km, SFP used 10km, Optical signal perfect.

Now i'm discussing about problem,

problem 1. Won't ping 8.8.8.8, 8.8.4.4. But successfully ping public IP, 4.2.2.2, 4.2.2.1, 8.26.247.26 etc

problem 2. some webpage give response like facebook. never response google.com.

problem 3. after changing dns only to 8.26.247.26, i get response from google.com, facebook.com, youtube.com, etc. but not from all, like filehippo.com,alibaba.com, etc.

problem 4. after changing dns to 8.26.247.26, i get response from some site but speed much lower then nominal speed.

Now please give me some solution for these problem. if problem occurs in router, please mention the problem

thank you

Tarikul

> public-dns-discuss+unsub...@googlegroups.com

[Shen Wan]

Does this problem still exist? Did you ISP give any suggestion on the ping problem? If your ISP can ping 8.8.8.8 but you cannot, maybe the problem exists in your local network.

On Saturday, March 2, 2013 1:11:26 AM UTC-5, Tarikul Islam wrote:

Shen,

Thank you for your reply. I already inform to the isp, but they say all is ok.

Tarikul