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Inconsistent response for non-existing domains #2600

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ameshkov opened this issue Jan 25, 2021 · 2 comments
Closed

Inconsistent response for non-existing domains #2600

ameshkov opened this issue Jan 25, 2021 · 2 comments
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@EugeneOne1
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bug P4: Low
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v0.105.2

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@ameshkov
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First (served not from the cache) dig -t a piggies.are.pink @192.168.11.144 has EDNS section in response.
Second, third, etc responses don't have it.

Responses need to be consistent.
@ameshkov ameshkov added this to the v0.106.0 milestone Jan 25, 2021
@ainar-g ainar-g self-assigned this Feb 5, 2021
@ainar-g ainar-g modified the milestones: v0.106.0, v0.105.1 Feb 10, 2021
@ainar-g ainar-g assigned EugeneOne1 and unassigned ainar-g Feb 11, 2021
@EugeneOne1
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As it said in RFC 6891:

OPT RRs MUST NOT be cached, forwarded, or stored in or loaded from master files.

It seems that that issue also goes against the standard.

@ameshkov
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No one says it should be cached. We should respond with our own EDNS extension when it's needed and not just forward what's received from the upstream. I suggest you checking how coredns works in this regard.

@ainar-g ainar-g modified the milestones: v0.105.1, v0.105.2 Feb 15, 2021
adguard pushed a commit to AdguardTeam/dnsproxy that referenced this issue Mar 2, 2021
@EugeneOne1
Pull request: 80 fix EDNS0 bug
3ad5a8c 
Merge in DNS/dnsproxy from 80-edns0 to master

Updates #80.
Updates AdguardTeam/AdGuardHome#2600.

* commit '9c4f5f82bf792887f81443942f77bf2ac507f6c5':
  proxy: imp code
  proxy: fix logic inaccuracy
  proxy: imp logic
  proxy: imp code, docs
  proxy: imp EDNS0 logic
  proxy: fix cached EDNS0 bug
@adguard adguard closed this as completed in a234b63 Mar 3, 2021
heyxkhoa pushed a commit to heyxkhoa/AdGuardHome that referenced this issue Mar 20, 2023
@EugeneOne1 @heyxkhoa
Pull request: 2600 inconsistent response
8874af4 
Merge in DNS/adguard-home from 2600-upd-dnsproxy to master

Closes AdguardTeam#2600.

Squashed commit of the following:

commit 4b15153
Author: Eugene Burkov <[email protected]>
Date:   Tue Mar 2 18:39:19 2021 +0300

    all: upd dnsproxy again, log changes

commit 8a86620
Author: Eugene Burkov <[email protected]>
Date:   Tue Mar 2 14:53:48 2021 +0300

    all: cleanup

commit ae81234
Author: Eugene Burkov <[email protected]>
Date:   Tue Mar 2 14:49:28 2021 +0300

    all: fix deps

commit 662384c
Author: Eugene Burkov <[email protected]>
Date:   Tue Mar 2 13:58:26 2021 +0300

    all: upd dnsproxy version, fix functions' signatures
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@ainar-g @ameshkov @EugeneOne1