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For example, I noticed a while back that the Chrome/Chromium browsers send the dns lookup of every website you visit to Google's own dns servers - even though i

For example, I noticed a while back that the Chrome/Chromium browsers send the dns lookup of every website you visit to Google's own dns servers - even though i have NOT configured them in my OS. (You can easily check this with an app like Little Snitch, look for the browser connecting to IPs 8.8.8.8 and 8.8.4.4)

konart 10y ago
Which is why I can't use chrome at work at all. Google's services and DNS are blocked by admins, so when you try to open any site you get DNS_LOOKUP_FAILED error.
- DavideNL 10y ago
  i don't think that's correct, because if you block 8.8.8.8 and 8.8.4.4 with the OSX pf firewall, then Chromium will use your OS configured DNS servers and everything still works (i do this.)
tombrossman 10y ago
Are you certain that Chromium does this too? Because their documentation explicitly contradicts your statement: "This is done using the computer's normal DNS resolution mechanism; no connection to Google is used." Source - https://www.chromium.org/developers/design-documents/dns-prefetching https://www.chromium.org/developers/design-documents/dns-pre...
- DavideNL 10y ago
  Yes, see comment below... i just checked with Chromium 57.0.2983.0 (64-bit) and it's still doing it.
CaptSpify 10y ago
Interesting. I just ran a check on my own host, and chromium did not do that. Obviously there are a bunch of potential reasons why: Chromium may act differently than chrome, they may only send some dns queries instead of all of them, etc
- DavideNL 10y ago
  i just checked with Chromium 57.0.2983.0 (64-bit) and it's still doing it. I also just noticed that Little Snitch actually does NOT log the dns requests. Maybe this is caused by Chromium using ipv6 to access google-public-dns-a.google.com ? Anyway, I then installed Vallum (1) and with this app, in the log i see many of these requests: https://i.imgur.com/lUR3Fd7.png https://i.imgur.com/lUR3Fd7.png (1) https://vallumfirewall.com/ https://vallumfirewall.com/
  - CaptSpify 10y ago
    Interesting. I only checked for ipv4, so that may be it. I'll try again later if I remember. Thanks

konart 10y ago

Which is why I can't use chrome at work at all. Google's services and DNS are blocked by admins, so when you try to open any site you get DNS_LOOKUP_FAILED error.

DavideNL 10y ago
i don't think that's correct, because if you block 8.8.8.8 and 8.8.4.4 with the OSX pf firewall, then Chromium will use your OS configured DNS servers and everything still works (i do this.)

tombrossman 10y ago

Are you certain that Chromium does this too? Because their documentation explicitly contradicts your statement: "This is done using the computer's normal DNS resolution mechanism; no connection to Google is used." Source - https://www.chromium.org/developers/design-documents/dns-prefetching https://www.chromium.org/developers/design-documents/dns-pre...

DavideNL 10y ago
Yes, see comment below... i just checked with Chromium 57.0.2983.0 (64-bit) and it's still doing it.

CaptSpify 10y ago

Interesting. I just ran a check on my own host, and chromium did not do that. Obviously there are a bunch of potential reasons why: Chromium may act differently than chrome, they may only send some dns queries instead of all of them, etc

DavideNL 10y ago
i just checked with Chromium 57.0.2983.0 (64-bit) and it's still doing it. I also just noticed that Little Snitch actually does NOT log the dns requests. Maybe this is caused by Chromium using ipv6 to access google-public-dns-a.google.com ? Anyway, I then installed Vallum (1) and with this app, in the log i see many of these requests: https://i.imgur.com/lUR3Fd7.png https://i.imgur.com/lUR3Fd7.png (1) https://vallumfirewall.com/ https://vallumfirewall.com/
- CaptSpify 10y ago
  Interesting. I only checked for ipv4, so that may be it. I'll try again later if I remember. Thanks