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I am trying to figure out an issue. My internet is working fine, but this one website is not resolving. It works via a proxy, traceroute works:

 1  192.168.1.1 (192.168.1.1)  4.205 ms  0.568 ms  0.510 ms
 2  * * *
 3  67.59.255.13 (67.59.255.13)  10.583 ms  7.949 ms  7.557 ms
 4  67.59.255.61 (67.59.255.61)  10.256 ms  9.576 ms  13.083 ms
 5  64.15.8.126 (64.15.8.126)  9.943 ms  11.929 ms  11.452 ms
 6  64.15.0.217 (64.15.0.217)  14.655 ms  14.092 ms  13.771 ms
 7  64.15.0.118 (64.15.0.118)  33.201 ms  34.875 ms  36.544 ms
 8  xe-6-0-3.ar1.ord1.us.nlayer.net (69.31.111.169)  34.027 ms  34.957 ms  34.231 ms
 9  ae1-30g.cr1.ord1.us.nlayer.net (69.31.111.133)  82.683 ms  35.138 ms  37.592 ms
10  xe-3-0-0.cr2.iad1.us.nlayer.net (69.22.142.26)  41.657 ms  34.063 ms  34.519 ms
11  ae2-30g.ar2.iad1.us.nlayer.net (69.31.31.186)  35.780 ms  36.361 ms  33.968 ms
12  as33597.xe-3-0-7.ar2.iad1.us.nlayer.net (69.31.30.230)  35.086 ms
as33597.xe-3-0-7.ar2.iad1.us.nlayer.net (69.31.30.234)  38.031 ms
as33597.xe-3-0-7.ar2.iad1.us.nlayer.net (69.31.30.230)  36.833 ms
13  cr1.iad2.inforelay.net (66.231.176.246)  32.595 ms
cr2.iad1.inforelay.net (66.231.176.10)  31.771 ms
cr1.iad2.inforelay.net (66.231.176.246)  32.622 ms
14  cr1.iad2.inforelay.net (66.231.176.246)  32.956 ms  33.625 ms !X  41.058 ms
15  * cr1.iad2.inforelay.net (66.231.176.246)  35.312 ms !X *
16  * cr1.iad2.inforelay.net (66.231.176.246)  32.814 ms !X *
17  cr1.iad2.inforelay.net (66.231.176.246)  35.459 ms !X *  53.137 ms !X

Ping returns this:

Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6

But what I can not figure out is why my browsers (Firefox, Safari, Opera) can not resolve the domain. I am on a Wifi connection. What could be the problem?

BTW I am on a Mac (10.6.5)

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migrated from serverfault.com Jan 1 '11 at 7:45

This question came from our site for professional system and network administrators.

2  
What's the website? I see the tracert hops, but what is the site's domain that you're trying to reach? –  Wesley Jan 1 '11 at 1:34
3  
I'm not sure why you think traceroute is working. Traceroute's !X refers to "communication administratively prohibited" which means your traffic is being filtered. –  obfuscurity Jan 1 '11 at 2:36
    
@obfuscurity Would the filtering be from my ISP or would it be from a blacklist on the server? –  Colum Jan 1 '11 at 2:40
    
Look at your traceroute. The router at cr1.iad2.inforelay.net (66.231.176.246) is reporting back the message. –  obfuscurity Jan 1 '11 at 2:47
2  
Seriously, what's the website addy? –  Wesley Jan 1 '11 at 3:45
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3 Answers

I have had the exact same problem, where a number of websites would allow me to traceroute, but I could not access them or ping them (receiving the same icmp_seq timeout error).

The issue turned out to be my home router (Netgear DG834G) and a simple restart now and again fixes the problem. However I am none the wiser as to why this is happening, assuming its just a bug in the software, as it is usually after roughly the same uptime.

Have you tried restarting your router and trying again?

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Router, Modem, Router again. Nothing –  Colum Jan 1 '11 at 3:31
    
you may want to try to install DD-WRT software onto your router, it fixes some issues with me. –  Roy Rico Dec 14 '11 at 21:50
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Ask them if they are running mod_security - perhaps your IP is on a list of spammers. This can happen by accident if you're testing code that sends email from your own system in an invalid way.

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If you cannot resolve the domain, the problem is most likely with your DNS servers and not the site.

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