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DOH potential security risk message

Kuphostiwe

When trying DNS over https in in a neetwork that uses googles DNS 8.8.8.8 and 8.8.4.4 I configured FF as follows set network.trr.mode=3 set network.trr.bootstarpaddress=8.8.8.8 set network.trr.uri=https://dns.google/dns-query

Then I went to https://1.1.1.1/help knowing full well that I am use googles DOH and not cloudflare expecting cloudflare web site to tell me I am not using there services with results being all negative.

Instead FF reported that "Warning potential security problem ahead". See enclosed If I am using Googles DOH values and I go to a cloudgflare site why would FF flag the site as a security risk? Keeping in mind FF appears to be working for other sites in the DOH configuration for Google with no visible problems.

When trying DNS over https in in a neetwork that uses googles DNS 8.8.8.8 and 8.8.4.4 I configured FF as follows set network.trr.mode=3 set network.trr.bootstarpaddress=8.8.8.8 set network.trr.uri=https://dns.google/dns-query Then I went to https://1.1.1.1/help knowing full well that I am use googles DOH and not cloudflare expecting cloudflare web site to tell me I am not using there services with results being all negative. Instead FF reported that "Warning potential security problem ahead". See enclosed If I am using Googles DOH values and I go to a cloudgflare site why would FF flag the site as a security risk? Keeping in mind FF appears to be working for other sites in the DOH configuration for Google with no visible problems.
Ama-screenshot ananyekiwe

Isisombululo esikhethiwe

The network is a library in Canada, Toronto area. I didn't believe that the library would filter a specific 1.1.1.1 address and not other DOH sites. But It appears that is the case because I tried another device on that network and then I tried it on another public network and it worked.

I will have to put this question to the Library as to why the filter? Not that I expect an answer

Funda le mpendulo ngokuhambisana nalesi sihloko 0
Isicaphuno

Eminye Imininingwane Yohlelo

Isisebenziso

  • I-ejenti Engumsebenzisi: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:68.0) Gecko/20100101 Firefox/68.0

Eminye Imininingwane

jscher2000
  • Top 10 Contributor
8635 izisombululo 70627 izimpendulo
Kuphostiwe

Can you click the Advanced button for more information about why the certificate verification failed?

Can you click the Advanced button for more information about why the certificate verification failed?
Ingabe lokhu kube usizo kuwena? 1
Isicaphuno
cor-el
  • Top 10 Contributor
  • Moderator
17415 izisombululo 157316 izimpendulo
Kuphostiwe

Impendulo Ewusizo

1.1.1.1 would normally redirect you to a server in your vicinity using anycast, so there might be a domain mismatch for the certificate after the redirect.

1.1.1.1 would normally redirect you to a server in your vicinity using anycast, so there might be a domain mismatch for the certificate after the redirect.
Ingabe lokhu kube usizo kuwena? 1
Isicaphuno

Impendulo Ewusizo

The certificate failed because it was not HTTPs so the connection was not secure. But strangely I was not able to connect using CloudFlare DOh value only with Googles DOH value shown in this web site "https://github.com/curl/curl/wiki/DNS-over-HTTPS#publicly-available-servers"

The certificate failed because it was not HTTPs so the connection was not secure. But strangely I was not able to connect using CloudFlare DOh value only with Googles DOH value shown in this web site "https://github.com/curl/curl/wiki/DNS-over-HTTPS#publicly-available-servers"
Ingabe lokhu kube usizo kuwena? 1
Isicaphuno
Eldar Value 4 izisombululo 45 izimpendulo
Kuphostiwe

Those settings are working:

about:config?filter=network.trr

network.trr.bootstrapAddress > 8.8.8.8 network.trr.confirmationNS > dns.google network.trr.credentials > dns.google network.trr.disable-ECS > false network.trr.early-AAAA > true network.trr.mode > 3 network.trr.uri > https://dns.google.com/experimental

after set, restart firefox and enjoy :)

'''Those settings are working:''' about:config?filter=network.trr network.trr.bootstrapAddress > 8.8.8.8 network.trr.confirmationNS > dns.google network.trr.credentials > dns.google network.trr.disable-ECS > false network.trr.early-AAAA > true network.trr.mode > 3 network.trr.uri > https://dns.google.com/experimental '''after set, restart firefox and enjoy :)'''
Ingabe lokhu kube usizo kuwena? 1
Isicaphuno

Umnikazi wombuzo

I have already stated the settings I used. I have already stated that google DOH worked.

Why does cloudflare the default used by FF not work?

I have already stated the settings I used. I have already stated that google DOH worked. Why does cloudflare the default used by FF not work?
Ingabe lokhu kube usizo kuwena? 1
Isicaphuno
philipp
  • Top 25 Contributor
  • Moderator
5289 izisombululo 23366 izimpendulo
Kuphostiwe

again, please click on advanced on the error page to see what's the error code and possibly inspect the failing certificate...

again, please click on advanced on the error page to see what's the error code and possibly inspect the failing certificate...
Ingabe lokhu kube usizo kuwena?
Isicaphuno

Umnikazi wombuzo

You dont seem to understand. No certificate was obtained as shown in my enclosure.

Why would cloudflare site be blocked and not google? Why is it I could not get through to cloudflare when google DOH was working?

You dont seem to understand. No certificate was obtained as shown in my enclosure. Why would cloudflare site be blocked and not google? Why is it I could not get through to cloudflare when google DOH was working?
Ingabe lokhu kube usizo kuwena?
Isicaphuno
jscher2000
  • Top 10 Contributor
8635 izisombululo 70627 izimpendulo
Kuphostiwe

Hi Mace2, on the error page, there is an Advanced button -- the gray one next to the large blue one. That Advanced button opens a panel with more technical information about the problem. I don't think you can diagnose the issue without that.

Hi Mace2, on the error page, there is an Advanced button -- the gray one next to the large blue one. That Advanced button opens a panel with more technical information about the problem. I don't think you can diagnose the issue without that.
Ingabe lokhu kube usizo kuwena?
Isicaphuno

Umnikazi wombuzo

Enclosed is the advance tab. Keep in mind the google DOH values are set and work. But the cloudflare web site 1.1.1.1/help did not work

Enclosed is the advance tab. Keep in mind the google DOH values are set and work. But the cloudflare web site 1.1.1.1/help did not work
Ingabe lokhu kube usizo kuwena?
Isicaphuno
jscher2000
  • Top 10 Contributor
8635 izisombululo 70627 izimpendulo
Kuphostiwe

I'm looking at the domains of the certificate provided to Firefox in your screenshot and I wonder whether your service provider may not permit IP address URLs, or at least this one. Otherwise, why would that certificate be showing up?

I'm looking at the domains of the certificate provided to Firefox in your screenshot and I wonder whether your service provider may not permit IP address URLs, or at least this one. Otherwise, why would that certificate be showing up?
Ingabe lokhu kube usizo kuwena?
Isicaphuno

Isisombululo Esikhethiwe

The network is a library in Canada, Toronto area. I didn't believe that the library would filter a specific 1.1.1.1 address and not other DOH sites. But It appears that is the case because I tried another device on that network and then I tried it on another public network and it worked.

I will have to put this question to the Library as to why the filter? Not that I expect an answer

The network is a library in Canada, Toronto area. I didn't believe that the library would filter a specific 1.1.1.1 address and not other DOH sites. But It appears that is the case because I tried another device on that network and then I tried it on another public network and it worked. I will have to put this question to the Library as to why the filter? Not that I expect an answer
Ingabe lokhu kube usizo kuwena? 0
Isicaphuno
jscher2000
  • Top 10 Contributor
8635 izisombululo 70627 izimpendulo
Kuphostiwe

Do you think they filter 1.1.1.1 in particular, or filter IP address URLs in general?

Do you think they filter 1.1.1.1 in particular, or filter IP address URLs in general?
Ingabe lokhu kube usizo kuwena?
Isicaphuno

Umnikazi wombuzo

I think a greater question is why Cloidflare DOH was filtered over Google DOH

I think a greater question is why Cloidflare DOH was filtered over Google DOH
Ingabe lokhu kube usizo kuwena? 0
Isicaphuno
jscher2000
  • Top 10 Contributor
8635 izisombululo 70627 izimpendulo
Kuphostiwe

So if you aren't using DOH you can access https://1.1.1.1/help on that same network?

So if you aren't using DOH you can access https://1.1.1.1/help on that same network?
Ingabe lokhu kube usizo kuwena?
Isicaphuno

Umnikazi wombuzo

I am using DOH. I am using googles DOH server. The librayr is filtering only cloudflare DOH.

the configuration network.trr.mode=3 ensures only DOH is being used.

I am using DOH. I am using googles DOH server. The librayr is filtering only cloudflare DOH. the configuration network.trr.mode=3 ensures only DOH is being used.
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Isicaphuno
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