Slow or timing-out DNS lookups -- still looking for relief
On our home network w wired and wireless segments, my Win 10 (was Win 8.1) desktop continues to have long delays (5-10 seconds) and many DNS lookup timeouts browsing (using both Firefox and Chrome) and even in e-mail (Thunderbird) trying to connect to the cox pop and smtp servers.
This has been going on for months and I've put in several problems reports and done what was recommended without much effect. Latest was a visit last week from a COX tech to check signal strength, etc. All OK, apparently.
I have two other clues to mention:
1. Twice when I called Cox support, the tech "cleared a cache" that is apparently not customer-accessible. That seemed to make a big difference--for a few hours. Then back to abnormal.
2. I recently ran a traceroute (built into my Motorola cable modem-***-wireless-hub) to various well-known sites, including the Cox DNS servers. Most of the traceroutes FAILED after many (10-15) hops.
At this point if Cox can't fix this I have two more bullets: (1) replace the modem; (2) replace Cox.