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My ISP in the UK actually modifies the result of any lookup of google.com/google.co.uk regardless of if I am using their DNS or not. I don't think this specifi

by Willox 10y ago

My ISP in the UK actually modifies the result of any lookup of google.com/google.co.uk regardless of if I am using their DNS or not. I don't think this specific example is malicious (it's part of Google's Edge Network I guess? I wouldn't know), but it does show that they're already capable of modifying the DNS lookups ran by their customers.

moreati 10y ago
May I ask which ISP this is?
fred256 10y ago
Google itself will return an edge node for google.com (or google.$TLD) if you're on an ISP with an edge node.
rahrahrah 10y ago
What ISP is this?
djhworld 10y ago
what ISP are you with? I'm with BT and they don't appear to do this.
nl 10y ago
Are you sure that's what happening? I suspect you maybe seeing resolution to Google's edge network. This isn't modification - it is how DNS is designed to work.
- Willox 10y ago
  What feature of DNS allows this? I'm probably wrong if that's the case. Perhaps I'll check some other domains too.
  - giovannibajo1 10y ago
    https://tools.ietf.org/html/rfc7871 https://tools.ietf.org/html/rfc7871
    - nl 10y ago
      That's an extension to let you use Google's DNS servers and still have CDNs work. Without it the functionality described above will just work - it's only when you are using an unusual DNS setup that the extension is needed.
- deleted 10y ago
  [deleted]