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Cannot ping static IP's or router

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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.

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Message 1 of 7
Community Support

Re: Cannot ping static IP's or router

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. 

 

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Message 2 of 7
Tutor

Re: Cannot ping static IP's or router

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

Message 3 of 7
Community Support

Re: Cannot ping static IP's or router

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 @ATTCares and @DIRECTVService

*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.
Message 4 of 7
Tutor

Re: Cannot ping static IP's or router

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.

Message 5 of 7
Tutor

Re: Cannot ping static IP's or router

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.
Message 6 of 7
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Solution
Accepted by topic author
Accepted by dk-00-00
‎06-02-2016 7:45 PM

Re: Cannot ping static IP's or router

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.

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