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How do I troubleshoot distant Internet routing problems?

Fresh5 days ago
Mar 15, 20263312 views
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Problem

(This may be better answered on serverfault, but it's not technically about a server, so suggestions welcome...) We just moved offices at work. We're in Cambridge, MA, and have a Comcast business-class cable modem. Once every few days, for most of the day, we have trouble reaching some, but not all…

Error Output

~% traceroute slashdot.org
traceroute to slashdot.org (216.34.181.45), 64 hops max, 52 byte packets
 1  * * *
 2  te-7-1-ur01.cambridge.ma.boston.com…

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Fix for: How do I troubleshoot distant Internet routing problems?

Low Risk

Just to note: icmp-tests (traceroute|ping) aren't always accurate and correct - you may have successful TCP-connection with endpoint, but filtered ICMP-responses from some hops (including destination) and you haven't ability to detect (easy)- is it …

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