33350626f9
Since following a delegation resets most fetch context state, address marks (FCTX_ADDRINFO_MARK) set inside lib/dns/resolver.c are not preserved when a delegation is followed. This is fine for full recursive resolution but when named is configured with "forward first;" and one of the specified forwarders times out, triggering a fallback to full recursive resolution, that forwarder should no longer be consulted at each delegation point subsequently reached within a given fetch context. Add a new badnstype_t enum value, badns_forwarder, and use it to mark a forwarder as bad when it times out in a "forward first;" configuration. Since the bad server list is not cleaned when a fetch context follows a delegation, this prevents a forwarder from being queried again after falling back to full recursive resolution. Yet, as each fetch context maintains its own list of bad servers, this change does not cause a forwarder timeout to prevent that forwarder from being used by other fetch contexts.
63 lines
1.0 KiB
Plaintext
63 lines
1.0 KiB
Plaintext
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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options {
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query-source address 10.53.0.2;
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notify-source 10.53.0.2;
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transfer-source 10.53.0.2;
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port @PORT@;
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pid-file "named.pid";
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listen-on { 10.53.0.2; };
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listen-on-v6 { none; };
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recursion no;
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dnssec-validation no;
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};
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zone "." {
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type hint;
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file "root.db";
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};
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zone "example1." {
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type master;
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file "example.db";
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};
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zone "example2." {
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type master;
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file "example.db";
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};
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zone "example3." {
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type master;
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file "example.db";
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};
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zone "example4." {
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type master;
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file "example.db";
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};
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zone "example7." {
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type master;
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file "example.db";
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};
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zone "grafted." {
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type master;
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file "example.db";
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};
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zone "1.0.10.in-addr.arpa." {
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type master;
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file "example.db";
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};
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