Tuesday, August 07, 2018
When one computer can see a website, but not another ...
... then check their Network Adapter Settings to see what is specified for DNS.
We were checking that a website was available again after it had disappeared because of an expired domain. Once we had renewed the domain, we were checking whether the site was being served again - and found that one PC was getting the site correctly, but the other wasn't. Both were on the same network with a single router.
This difference continued even after clearing the cache.
The reason? One PC had its DNS address specified manually (to Google's DNS servers at 8.8.8.8) and the other was using the default DNS server provided by the ISP. Counterintuitively, the ISP's DNS server had updated when we were checking, but Google's DNS server hadn't updated at that point.
We were checking that a website was available again after it had disappeared because of an expired domain. Once we had renewed the domain, we were checking whether the site was being served again - and found that one PC was getting the site correctly, but the other wasn't. Both were on the same network with a single router.
This difference continued even after clearing the cache.
The reason? One PC had its DNS address specified manually (to Google's DNS servers at 8.8.8.8) and the other was using the default DNS server provided by the ISP. Counterintuitively, the ISP's DNS server had updated when we were checking, but Google's DNS server hadn't updated at that point.
# posted by John Geddes @ 12:12 pm 
