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dk-00-00

Tutor

 • 

5 Messages

Thu, Jun 2, 2016 1:57 AM

Cannot ping static IP's or router

Why can I no longer ping any of my static IP addresses from the Internet (using ping.eu)?

 

I have a 2wire 3800HGV-B that has worked well for several years (rented). I can no longer access (ping) any of the machines assigned, nor does the router respond to ping on its public address.

 

The machines have static addresses assigned, and I can reach the internet from them. Tracert from ping.eu fails at an AT&T network machine.

 

I verified all settings in router's LAN config, and each of the machines is set up in DMZplus mode.

Responses

Accepted Solution

Official Solution

dk-00-00

Tutor

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5 Messages

4 years ago

To all reading, I did a factory reset and reconfigured. Works now. AT&T may be blocking icmp requests from ping.eu servers. Network-Tools.com came in handy.

Community Support

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6.7K Messages

4 years ago

Hi @dk-00-00,

 

Rebooting the modem and re-entering the settings may work. Also, there is a setting in the modem to Block Ping. Unchecking that may help. It is under the Firewall setting. 

 

ATTU-verseCare

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dk-00-00

Tutor

 • 

5 Messages

4 years ago

I did all that. Ping is unblocked.Tracert halts at 12.122.18.29, cr2.sl9mo.ip.att.net

Community Support

 • 

6.7K Messages

4 years ago

If everything is routing correctly, and it is all working besides Ping requests, it could be an issue with the Ping packet getting discarded. You can get a packet tracing software like wireshark to see what is happening.

 

-ATTU-verseCare

AT&T Customer Care

Need help with an account specific question?  Post a new question here on the forums by clicking the "Ask a Question" button.
For additional support, please visit us at our AT&T services hub.
Follow us on: Twitter @ATTHelp

*I am an AT&T employee, and the postings on this site are my own and don't necessarily represent AT&T's position, strategies or opinions.
dk-00-00

Tutor

 • 

5 Messages

4 years ago

No traffic is making it in. No igmp, http, ftp, etc.. Nothing.

 

Like I said, AT&T static addresses have been working fine for years. Then suddenly, nothing coming in.

 

I would venture to say there was a filter put in place or something broken upstream (possibly at 12.122.18.29), so no internet traffic to my network. Outbound works as expected.

dk-00-00

Tutor

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5 Messages

4 years ago

10cr2.n54ny.ip.att.net12.122.130.110us124.827 ms124.453 ms124.419 ms
11cr2.wswdc.ip.att.net12.122.3.38us129.281 ms129.569 ms129.557 ms
12cr1.wswdc.ip.att.net12.122.2.33us129.198 ms130.243 ms129.931 ms
13cr2.sl9mo.ip.att.net12.122.18.29us128.375 ms130.268 ms128.314 ms
14   ***
15   ***
16   ***
No reply for 3 hops. Assuming we reached firewall.
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