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    • Showing only topics in ~comp with the tag "networking". Back to normal view / Search all groups

    1. Why are so many websites (and CDNs) IPv4 only?

      Ask
      One of the people in an IRC channel I frequent pointed out a site I've been building uses CDNs that are IPv4 only. I never realized this, I just assumed every major provider had deployed IPv6. Oh,...

      One of the people in an IRC channel I frequent pointed out a site I've been building uses CDNs that are IPv4 only. I never realized this, I just assumed every major provider had deployed IPv6. Oh, how very wrong I was. A quick check of some major (to me) sites shows a shocking lack of IPv6, including:

      • Bootstrap (stackpath.bootstrapcdn.com)
      • Discord
      • FontAwesome (use.fontawesome.com)
      • GitHub/GitHub pages
      • GitLab/GitLab pages (self-hosted supports IPv6, but officially hosted GitLab only supports IPv4 due to Azure limitations)
      • jQuery, IF you use code.jquery.com (some tutorials use ajax.googleapis.com, which does have IPv6, but an unfortunate amount use code.jquery.com, including the getting started page for Bootstrap)
      • Parts of Amazon/AWS (Amazon is IPv4 only, some of AWS is IPv4 only, including S3)
      • Reddit
      • Stack Overflow/Exchange/etc
      • Twitter

      An honorable mention goes to Angular's websites because the websites themselves are IPv4 only but the libraries are hosted on ajax.googleapis.com, which is IPv6 accessible. I checked npm, PyPI, RubyGems, and Tildes, and they all support IPv6.

      I can understand why companies like Amazon have partial support (upgrading can be a PITA if you're a cloud service provider with uptime requirements), but then you have services like Discord (launched in 2015 with no obligation to maintain service) that only support IPv4. At the very least, I'd expect CDNs referenced by thousands (if not millions) of webpages to be on IPv6 by now.

      Am I missing something? CDNs are pretty static, it's just a matter of choosing one that supports IPv6, you don't even need to update your application if you just change the DNS entries.

      13 votes

    5. Full blown SSH servers within Docker containers?

      Ask
      Trying to get a sense on how the networking would go down? If I had one public IP address and say 4 Docker containers on the host, how would the SSH connections work? Would I have to reserve ports...

      Trying to get a sense on how the networking would go down?

      If I had one public IP address and say 4 Docker containers on the host, how would the SSH connections work? Would I have to reserve ports for each container?

      7 votes

    6. Does anyone have tips or tricks for self studying / preparing to get a CCNA?

      Ask (advice)
      Hey everyone, I've decided to start studying to get my CCNA. My books are showing up Monday and I'm really excited. I'm going to shoot for self studying and prep for the testing. I think I can do...

      Hey everyone, I've decided to start studying to get my CCNA. My books are showing up Monday and I'm really excited.

      I'm going to shoot for self studying and prep for the testing. I think I can do it as I've always thrived in a more self paced learning environment (I also have no money for the classes).

      I'm just wondering if anyone has any tips, supplemental material, etc they could recommend? What was hardest for you and what was easiest? What did you spend too much time studying and what didn't you spend enough time on?

      6 votes