bind9局域网其他用户不能解析_domain-name-system – bind9无法正确解析dnssec

我的dns服务器设置有问题.我的绑定服务器主要是缓存服务器,但也提供一些内部域.它只在我的专用网络上监听,并且只提供来自那里的请求.

今天我想启用绑定来验证DNSSEC,但不知怎的,它做得不正确.如果我解决了绑定linux机器本身的主机名,那么无效的DNSSEC就完全如此显示.但是,如果我尝试在网络中的其他计算机上再次使用相同的dig命令解析同一个域,则DNSSEC检查不会失败并且域可以很好地解析.我想要它做的是将正确的SERVFAIL发送到网络中的其他DNS客户端.

以下是您可能需要的所有信息(绑定版本,配置等).我会追加我最后做的挖掘.

操作系统版本

root@thor:/etc/bind# lsb_release -a

No LSB modules are available.

Distributor ID: Debian

Description: Debian GNU/Linux 8.5 (jessie)

Release: 8.5

Codename: jessie

root@thor:/etc/bind# uname -a

Linux thor.home.intranet 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt25-2 (2016-04-08) x86_64 GNU/Linux

绑定版本

BIND 9.9.5-9+deb8u6-Debian (Extended Support Version)

named.conf中

include "/etc/bind/named.conf.options";

include "/etc/bind/named.conf.local";

include "/etc/bind/named.conf.default-zones";

named.conf.options

options {

directory "/var/cache/bind";

forwarders {

208.67.222.222; # resolver1.opendns.com

208.67.220.220; # resolver2.opendns.com

# 8.8.8.8; # google-public-dns-a.google.com

# 8.8.4.4; # google-public-dns-b.google.com

};

dnssec-enable yes;

dnssec-validation auto;

auth-nxdomain no; # conform to RFC1035

listen-on {

127.0.0.1;

192.168.10.36;

};

recursion yes;

allow-recursion { 127.0.0.0/8; 192.168.10.0/24; };

max-ncache-ttl 0;

};

named.conf.local

zone "intranet" {

type master;

file "/etc/bind/master/db.intranet";

};

zone "10.168.192.in-addr.arpa" {

type master;

file "/etc/bind/master/db.10.168.192";

};

zone "box" {

type master;

file "/etc/bind/master/db.box";

};

named.conf.default-区

// prime the server with knowledge of the root servers

zone "." {

type hint;

file "/etc/bind/db.root";

};

// be authoritative for the localhost forward and reverse zones,and for

// broadcast zones as per RFC 1912

zone "localhost" {

type master;

file "/etc/bind/db.local";

};

zone "127.in-addr.arpa" {

type master;

file "/etc/bind/db.127";

};

zone "0.in-addr.arpa" {

type master;

file "/etc/bind/db.0";

};

zone "255.in-addr.arpa" {

type master;

file "/etc/bind/db.255";

};

DNS结果

如果我要求服务器上的无效域(thor),我会得到以下内容：

user@thor:/etc/bind$dig @192.168.10.36 sigfail.verteiltesysteme.net

; <<>> DiG 9.9.5-9+deb8u6-Debian <<>> @192.168.10.36 sigfail.verteiltesysteme.net

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<

;; flags: qr rd ra; QUERY: 1,ANSWER: 0,AUTHORITY: 0,ADDITIONAL: 1

;; OPT PSEUDOSECTION:

; EDNS: version: 0,flags:; udp: 4096

;; QUESTION SECTION:

;sigfail.verteiltesysteme.net. IN A

;; Query time: 256 msec

;; SERVER: 192.168.10.36#53(192.168.10.36)

;; WHEN: Fri Jul 08 21:27:37 CEST 2016

;; MSG SIZE rcvd: 57

如果我在使用cygwin运行Windows 10的客户端上执行完全相同的查询,我会得到：

user@COMPUTER:~$dig @192.168.10.36 sigfail.verteiltesysteme.net

; <<>> DiG 9.10.3-P4 <<>> @192.168.10.36 sigfail.verteiltesysteme.net

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<

;; flags: qr rd ra; QUERY: 1,ANSWER: 1,AUTHORITY: 2,ADDITIONAL: 5

;; OPT PSEUDOSECTION:

; EDNS: version: 0,flags:; udp: 4096

;; QUESTION SECTION:

;sigfail.verteiltesysteme.net. IN A

;; ANSWER SECTION:

sigfail.verteiltesysteme.net. 60 IN A 134.91.78.139

;; AUTHORITY SECTION:

verteiltesysteme.net. 3600 IN NS ns1.verteiltesysteme.net.

verteiltesysteme.net. 3600 IN NS ns2.verteiltesysteme.net.

;; ADDITIONAL SECTION:

ns1.verteiltesysteme.net. 2910 IN A 134.91.78.139

ns1.verteiltesysteme.net. 2910 IN AAAA 2001:638:501:8efc::139

ns2.verteiltesysteme.net. 2910 IN A 134.91.78.141

ns2.verteiltesysteme.net. 2910 IN AAAA 2001:638:501:8efc::141

;; Query time: 52 msec

;; SERVER: 192.168.10.36#53(192.168.10.36)

;; WHEN: Fr Jul 08 21:27:46 CEST 2016

;; MSG SIZE rcvd: 197

我希望你能帮助我.

先感谢您

– 编辑 –

感谢@HåkanLindqvist,我注意到配置非常糟糕.为了清理这个东西并摆脱所有这些错误,我抛弃了所有转发并立即自行解决.这不应该是一个很大的交易,因为服务器无论如何缓存它.

我的named.conf.options现在看起来如下：

options {

directory "/var/cache/bind";

dnssec-enable yes;

dnssec-validation auto;

auth-nxdomain no; # conform to RFC1035

listen-on {

127.0.0.1;

192.168.10.36;

};

recursion yes;

allow-recursion { 127.0.0.0/8; 192.168.10.0/24; };

max-ncache-ttl 0;

};

日志显示没有更多奇怪的错误,现在正确记录了无效签名：

Jul 9 00:33:05 thor named[2940]: validating @0x7fd2d0391140: sigfail.verteiltesysteme.net A: no valid signature found

Jul 9 00:33:05 thor named[2940]: error (no valid RRSIG) resolving 'sigfail.verteiltesysteme.net/A/IN': 134.91.78.141#53

但我的结果不一致的问题仍然存在.两个客户端都使用相同的绑定服务器：

电脑：

user@COMPUTER:~$dig +short @192.168.10.36 hostname.bind CH TXT

"thor.home.intranet"

user@COMPUTER:~$dig +short @192.168.10.36 version.bind CH TXT

"9.9.5-9+deb8u6-Debian"

服务器：

user@thor:/etc/bind# dig @192.168.10.36 +short hostname.bind CH TXT

"thor.home.intranet"

user@thor:/etc/bind# dig @192.168.10.36 +short version.bind CH TXT

"9.9.5-9+deb8u6-Debian"

但结果仍然不同.

电脑：

user@COMPUTER:~$nslookup sigfail.verteiltesysteme.net

Server: 192.168.10.36

Address: 192.168.10.36#53

Non-authoritative answer:

Name: sigfail.verteiltesysteme.net

Address: 134.91.78.139

服务器：

root@thor:/etc/bind# nslookup sigfail.verteiltesysteme.net

Server: 192.168.10.36

Address: 192.168.10.36#53

** server can't find sigfail.verteiltesysteme.net: SERVFAIL

需要注意的一点很重要(我认为)：即使我在计算机上发送请求,我的服务器也会在日志中说没有有效的签名.这样它就明确地认识到,DNSSEC验证失败了..但它仍然会将NOERROR发送到我的电脑.

– EDIT2 –

即使明确设置了EDNS标志,我仍然得到一个结果.

user@COMPUTER:~$dig @192.168.10.36 +dnssec sigfail.verteiltesysteme.net

; <<>> DiG 9.10.3-P4 <<>> @192.168.10.36 +dnssec sigfail.verteiltesysteme.net

; (1 server found)

;; global options: +cmd

;; Got answer:

;; ->>HEADER<

;; flags: qr rd ra; QUERY: 1,ANSWER: 2,AUTHORITY: 3,ADDITIONAL: 9

;; OPT PSEUDOSECTION:

; EDNS: version: 0,flags: do; udp: 4096

;; QUESTION SECTION:

;sigfail.verteiltesysteme.net. IN A

;; ANSWER SECTION:

sigfail.verteiltesysteme.net. 60 IN A 134.91.78.139

sigfail.verteiltesysteme.net. 60 IN RRSIG A 5 3 60 20200610081125 20150611081125 30665 verteiltesysteme.net. //This+RRSIG+is+deliberately+broken///For+more+informati on+please+go+to/http+//dnssec+vs+uni/hyphen/+due+der eplace+/hyphen/+with+character// //8=

;; AUTHORITY SECTION:

verteiltesysteme.net. 3600 IN NS ns2.verteiltesysteme.net.

verteiltesysteme.net. 3600 IN NS ns1.verteiltesysteme.net.

verteiltesysteme.net. 3600 IN RRSIG NS 5 2 3600 20200610081125 20150611081125 30665 verteiltesysteme.net. s4iS0q402GTqtpy1WWspX1KHY3hb0/SOq79qWzRL5PFacAAKK+2ltxWW PTuwsYOWP3l+uq7xu80G0UQNtWPmISa2SYnktvXoZWbdy8F7q8GOH5xw 2t+JokxheEz5Xe4Xy7TmONIxVGq7M9FX4hDBva62PztcGq7UMZMWgyNs P/o=

;; ADDITIONAL SECTION:

ns1.verteiltesysteme.net. 69 IN A 134.91.78.139

ns1.verteiltesysteme.net. 69 IN AAAA 2001:638:501:8efc::139

ns2.verteiltesysteme.net. 69 IN A 134.91.78.141

ns2.verteiltesysteme.net. 69 IN AAAA 2001:638:501:8efc::141

ns1.verteiltesysteme.net. 69 IN RRSIG A 5 3 3600 20200610081125 20150611081125 30665 verteiltesysteme.net. kIcbu+YRC6xby461JYrNE3WSOQmTM6UstxKYo8uO1mEysvfDUs23Yuv6 nG+yMo3enmdIg89pPuLWIsz16uYxswl4DlplCYYPP9nT4d+9bjbMHu5S 7hi/uTlYEFwUCDlyQn38sEwnDHwbBnuW0uvYwV/TPTTjtcfYEw0R8zGI QQU=

ns1.verteiltesysteme.net. 69 IN RRSIG AAAA 5 3 3600 20200610081125 20150611081125 30665 verteiltesysteme.net. PzZiFVbjYHb1+xpIfZGbbtogY94uNvpqHBBibk0Sp7n5BLz4PJZ+dJYc rlikoNK1KyhnHugqCzh6Cr/t23lpioXUPjMWHFYcHsV4kcldTzt7Pl9Q 8h/IvlvtC33TYXnopmmGoV9vbjgpmgpAt//dY8UdNlXD/Dh6CDver+XT 34A=

ns2.verteiltesysteme.net. 69 IN RRSIG A 5 3 3600 20200610081125 20150611081125 30665 verteiltesysteme.net. PVIDSVFi0GLHavnTFj2JnHn+1A/wOAKS8fMzavMhkFycWjudxDuC19uW Ak9vCV5dR/3ZW4UGQUjZFgVI45fQP2yCJ5H98Z7vfn4FF9gxKwGy+TDt dLeOzcdorOF70aYHEWyYWK5tcq1SqXLXJQMp3G/MY362vqCzbFiIUk32 3q4=

ns2.verteiltesysteme.net. 69 IN RRSIG AAAA 5 3 3600 20200610081125 20150611081125 30665 verteiltesysteme.net. Fhg3JLyBsuXG4UCvG3y48gL8lz2Tu5Hx+ClxoXf4NjWs2MK/XScHEzwb UdOhz4aHnZbfWORoXHSD3DR92vBooix+522Z2GhCg1eiXBP66VDyypqT Ar7kUTXJHmsa70k/ubYHC6P6Imy68CbIi5xPr+OFZHrL/CTv9fcLVg3A ikU=

;; Query time: 53 msec

;; SERVER: 192.168.10.36#53(192.168.10.36)

;; WHEN: Sa Jul 09 01:07:08 CEST 2016

;; MSG SIZE rcvd: 1277

– EDIT3 –

我在调试级别10上启用了查询日志,以确保正在发送正确的查询.查询“dig @ 192.168.10.36 dnssec sigfail.verteiltesysteme.net”生成以下三个条目

09-Jul-2016 01:23:50.419 client 192.168.10.36#47038 (sigfail.verteiltesysteme.net): query: sigfail.verteiltesysteme.net IN A +ED (192.168.10.36)

09-Jul-2016 01:23:59.620 client 192.168.10.2#64858 (sigfail.verteiltesysteme.net): query: sigfail.verteiltesysteme.net IN A +ED (192.168.10.36)

09-Jul-2016 01:24:32.417 client 192.168.10.2#54071 (sigfail.verteiltesysteme.net): query: sigfail.verteiltesysteme.net IN A +ED (192.168.10.36)

192.168.10.2是我的计算机,192.168.10.36是绑定运行的服务器.

我还按照你的建议从isc.org下载了当前的绑定版本并运行它.结果与cygwin相同.上面日志中的第三个结果是由isc.org bind生成的.

– 编辑4 –

作为一个非常晚但最后编辑：我终于找到了解决方案.

我使用Avast作为我的AV,似乎拦截了DNS流量并将其转发给他们的Avast“安全服务器”.

卸载Avast并运行Windows Defender解决了这个问题.

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