Недавно решил поднять кэширующий ДНС-сервер. Собственно говоря, по самой процедуре вопросов особых не возникло. На первый взгляд всё заработало. Но есть одна проблема: логи буквально за считаные минуты разрастаются до огромных размеров. И записи в них вот такого содержания:
Код: Выделить всё
error (unexpected RCODE SERVFAIL) resolving '211.70.191.186.IN-ADDR.ARPA/PTR/IN': 170.51.242.18#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 193.104.149.65#53
error (unexpected RCODE REFUSED) resolving '55.186.136.89.in-addr.arpa/PTR/IN': 194.102.255.3#53
error (unexpected RCODE SERVFAIL) resolving 'highschoolemail.com/MX/IN': 64.207.128.246#53
error (unexpected RCODE REFUSED) resolving 'www.realfit.ru/A/IN';: 83.170.91.205#53
error (unexpected RCODE SERVFAIL) resolving '219.247.28.196.IN-ADDR.ARPA/PTR/IN': 66.198.145.99#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 91.210.6.228#53
error (FORMERR) resolving 'u8lafv05630edji3ui4m2muoms.gcdn.biz/AAAA/IN': 94.75.223.25#53
error (unexpected RCODE SERVFAIL) resolving '219.247.28.196.IN-ADDR.ARPA/PTR/IN': 193.50.53.3#53
error (unexpected RCODE REFUSED) resolving '125.64-127.111.23.163.in-addr.arpa/PTR/IN': 163.23.111.65#53
error (unexpected RCODE SERVFAIL) resolving '219.247.28.196.IN-ADDR.ARPA/PTR/IN': 66.198.145.99#53
error (FORMERR) resolving 'u8lafv05630edji3ui4m2muoms.gcdn.biz/AAAA/IN': 188.40.44.206#53
error (unexpected RCODE REFUSED) resolving '200.169.147.120.in-addr.arpa/PTR/IN': 144.135.133.76#53
error (unexpected RCODE SERVFAIL) resolving 'highschoolemail.com/TXT/IN': 64.207.128.246#53
error (unexpected RCODE SERVFAIL) resolving 'www.pink-pelikan.ru/A/IN';: 91.142.81.238#53
error (FORMERR) resolving 'u8lafv05630edji3ui4m2muoms.gcdn.biz/AAAA/IN': 94.75.223.25#53
error (unexpected RCODE REFUSED) resolving '26.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.4#53
error (unexpected RCODE SERVFAIL) resolving '219.247.28.196.IN-ADDR.ARPA/PTR/IN': 193.50.53.3#53
error (FORMERR) resolving 'u8lafv05630edji3ui4m2muoms.gcdn.biz/AAAA/IN': 85.17.79.33#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 91.210.6.228#53
error (unexpected RCODE REFUSED) resolving '4.107.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '4.107.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/MX/IN': 158.43.129.77#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/A/IN': 158.43.193.77#53
error (unexpected RCODE SERVFAIL) resolving 'www.pink-pelikan.ru/A/IN';: 91.142.84.206#53
error (FORMERR) resolving 'u8lafv05630edji3ui4m2muoms.gcdn.biz/AAAA/IN': 85.17.79.33#53
error (unexpected RCODE REFUSED) resolving '219.247.28.196.IN-ADDR.ARPA/PTR/IN': 206.82.130.196#53
error (unexpected RCODE REFUSED) resolving '26.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.1#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 193.104.149.65#53
error (unexpected RCODE REFUSED) resolving '125.64-127.111.23.163.in-addr.arpa/PTR/IN': 163.23.111.65#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '4.107.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '4.107.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 193.104.149.65#53
error (unexpected RCODE REFUSED) resolving '55.186.136.89.in-addr.arpa/PTR/IN': 194.102.255.3#53
error (FORMERR) resolving 'a296759604eedd6537600849db0595f0f7e9f2537b67cbb4.gcdn.biz/AAAA/IN': 94.75.223.25#53
error (FORMERR) resolving 'u8lafv05630edji3ui4m2muoms.gcdn.biz/AAAA/IN': 188.40.44.206#53
error (unexpected RCODE SERVFAIL) resolving '90.53.188.91.in-addr.arpa/PTR/IN': 81.198.180.1#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 91.210.6.228#53
error (unexpected RCODE REFUSED) resolving '76.96.53.92.in-addr.arpa/PTR/IN': 92.53.98.100#53
error (unexpected RCODE REFUSED) resolving '219.247.28.196.IN-ADDR.ARPA/PTR/IN': 206.82.130.196#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '133.138.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (FORMERR) resolving 'a296759604eedd6537600849db0595f0f7e9f2537b67cbb4.gcdn.biz/AAAA/IN': 85.17.79.33#53
error (unexpected RCODE REFUSED) resolving '76.96.53.92.in-addr.arpa/PTR/IN': 92.53.116.200#53
error (unexpected RCODE REFUSED) resolving 'www.7dvd.ru/A/IN';: 89.108.104.3#53
error (unexpected RCODE SERVFAIL) resolving 'www.7dvd.ru/A/IN';: 89.108.64.2#53
error (unexpected RCODE REFUSED) resolving '247.237.38.89.IN-ADDR.ARPA/PTR/IN': 82.79.33.10#53
error (unexpected RCODE SERVFAIL) resolving '90.53.188.91.in-addr.arpa/PTR/IN': 81.198.180.1#53
error (unexpected RCODE SERVFAIL) resolving 'highschoolemail.com/A/IN': 70.32.65.137#53
error (unexpected RCODE SERVFAIL) resolving 'www.pink-pelikan.ru/A/IN';: 91.142.84.206#53
error (FORMERR) resolving 'a296759604eedd6537600849db0595f0f7e9f2537b67cbb4.gcdn.biz/AAAA/IN': 188.40.44.206#53
error (unexpected RCODE REFUSED) resolving '13.145.245.121.IN-ADDR.ARPA/PTR/IN': 202.54.15.30#53
error (unexpected RCODE REFUSED) resolving '140.102.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '224.140.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '94.141.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '94.141.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '140.102.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '224.140.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/TXT/IN': 158.43.129.77#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/MX/IN': 158.43.129.77#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 193.104.149.65#53
error (unexpected RCODE SERVFAIL) resolving 'www.pink-pelikan.ru/A/IN';: 91.142.81.238#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/A/IN': 158.43.193.77#53
error (unexpected RCODE REFUSED) resolving '21.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.1#53
error (unexpected RCODE REFUSED) resolving '19.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.1#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/TXT/IN': 158.43.193.77#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 91.210.6.228#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/MX/IN': 158.43.193.77#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/A/IN': 158.43.129.77#53
error (unexpected RCODE REFUSED) resolving '19.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.4#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/A/IN': 158.43.129.77#53
error (unexpected RCODE REFUSED) resolving '26.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.4#53
error (unexpected RCODE SERVFAIL) resolving 'highschoolemail.com/MX/IN': 64.207.128.246#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/MX/IN': 158.43.129.77#53
error (unexpected RCODE REFUSED) resolving '39.141.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '39.141.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '140.102.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '224.140.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '140.102.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '224.140.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving 'medsys.co.uk/A/IN': 158.43.193.77#53
error (unexpected RCODE REFUSED) resolving '26.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.1#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 193.104.149.65#53
error (unexpected RCODE SERVFAIL) resolving '\032server.bpiconnect.com/A/IN': 217.160.81.164#53
error (unexpected RCODE REFUSED) resolving 'www.newultra.ru/A/IN';: 91.210.6.228#53
error (unexpected RCODE REFUSED) resolving 'topya.ru/A/IN': 77.120.107.131#53
error (unexpected RCODE SERVFAIL) resolving 'highschoolemail.com/A/IN': 64.207.128.246#53
error (unexpected RCODE REFUSED) resolving '21.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.1#53
error (unexpected RCODE REFUSED) resolving '19.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.1#53
error (unexpected RCODE SERVFAIL) resolving '\032server.bpiconnect.com/A/IN': 217.160.80.164#53
error (unexpected RCODE REFUSED) resolving 'topya.ru/A/IN': 77.120.107.132#53
error (unexpected RCODE REFUSED) resolving '56.143.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '167.102.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '32.100.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '167.102.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '224.140.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '56.143.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '224.140.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '32.100.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '167.102.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE REFUSED) resolving '56.143.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '167.102.151.90.in-addr.arpa/PTR/IN': 195.38.32.2#53
error (unexpected RCODE REFUSED) resolving '56.143.151.90.in-addr.arpa/PTR/IN': 195.38.33.2#53
error (unexpected RCODE SERVFAIL) resolving 'highschoolemail.com/MX/IN': 70.32.65.137#53
error (unexpected RCODE REFUSED) resolving '21.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.4#53
error (unexpected RCODE REFUSED) resolving '19.212.120.193.in-addr.arpa/PTR/IN': 192.111.39.4#53
error (unexpected RCODE REFUSED) resolving '125.64-127.111.23.163.in-addr.arpa/PTR/IN': 163.23.111.65#53
error (unexpected RCODE SERVFAIL) resolving '211.70.191.186.IN-ADDR.ARPA/PTR/IN': 170.51.242.18#53И это лишь маленький кусочек лога. Мне пришлось остановить named, дабы он весь винт не забил своими логами...
Вот конфиг:
Код: Выделить всё
//
// named.conf
//
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
//
// See /usr/share/doc/bind*/sample/ for example named configuration files.
//
options {
listen-on port 53 { 127.0.0.1;
192.168.199.2; };
// listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt";
allow-query { localhost;
192.168.0.0/16; };
// forwarders { 212.49.118.2;
// 212.49.103.2; };
forwarders { 212.49.103.2;
212.49.118.2; };
recursion yes;
// dnssec-enable yes;
// dnssec-validation yes;
// dnssec-lookaside auto;
/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
zone "." IN {
type hint;
file "named.ca";
};
zone "_msdcs.egarant.local" {
type slave;
file "_msdcs.egarant.local";
masters { 192.168.199.202;
192.168.199.199; };
};
zone "egarant.local" {
type slave;
file "egarant.local";
masters { 192.168.199.202;
192.168.199.199; };
};
zone "_msdcs.egarant1.local" {
type slave;
file "_msdcs.egarant1.local";
masters { 192.168.1.200;
192.168.1.201; };
};
zone "egarant1.local" {
type slave;
file "egarant1.local";
masters { 192.168.1.200;
192.168.1.201; };
};
include "/etc/named.rfc1912.zones";Ещё я в файл /etc/sysconfig/named добавил вот такую строчку:
OPTIONS="-4"
Это чтоб он только ай-пишники v4 кэшировал, а v6 пропускал мимо.
Один мой товарищ написал по этому поводу следующее:
Интересная ситуация...
если смотреть ошибку вида:
error (unexpected RCODE REFUSED) resolving '55.186.136.89.in-addr.arpa/PTR/IN': 194.102.255.3#53
она говорит о том, что твой сервак не может получить ответ на запрос от сервера 194.102.255.3. Если пробовать спросить у этого сервера руками - он действительно ничего не отвечает. То есть, строго говоря, ничего криминального в этом нет...
У меня в логах тоже есть такие ошибки, но их число не превышает 1-2-х десятков за сутки.
Мне кажется тут проблему не в named надо искать, а в том, почему он щемится непонятно куда и спрашивает непонятно что... Причем, обрати внимание, что очень много запросов на обратные зоны...
Может у тебя какой сифилис живет, который и лезет везде подряд, просто named его показал лицом?
Постарайся отловить кто шлет все эти запросы...
Вот в связи с этим и вопрос: Как и с помощью чего можно попытаться отследить этот самый "сифилис"? Дело в том, что пока сервер, где установлен Named, никем не используется в качечестве DNS-сервера. Т.е. рабочие станции к нему пока не обращаются с днс-запросами. Неужели что-то непосредственно с самого сервера куда-то ломится?
Помогите понять причину, пожалуйста.