我在 CentOS 6.7 VPS 上运行 bind，但无法让它响应请求。我不确定，但我有点怀疑 m 和 loopback 接口之间存在一些冲突。这是我的 ifconfig：
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:47950 errors:0 dropped:0 overruns:0 frame:0
TX packets:47950 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5117063 (4.8 MiB) TX bytes:5117063 (4.8 MiB)
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0 Mask:255.255.255.255
inet6 addr: MY:EXT:IP:V6::IP/56 Scope:Global
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
RX packets:326740 errors:0 dropped:0 overruns:0 frame:0
TX packets:136115 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:260931596 (248.8 MiB) TX bytes:25033964 (23.8 MiB)
venet0:0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet addr:MY.EXT.ERN.IP P-t-P:MY.EXT.ERN.IP Bcast:AAA.AAA.AAA.AAA Mask:255.255.224.0
UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1
这是我的/etc/named.conf（我非常怀疑问题出在包含的配置文件中）：
options {
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";
forwarders {
# these are the DNS servers from the VPS provider (look in /etc/resolv.conf if yours are different)
MY.PROV.DNS.IP;
8.8.8.8;
8.8.4.4;
};
auth-nxdomain no; # conform to RFC1035
listen-on { any; };
listen-on-v6 { any; };
allow-query { any; };
allow-recursion { any; };
allow-transfer { MY.PROV.DNS.IP;};
recursion yes;
dnssec-enable no;
dnssec-validation no;
/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";
managed-keys-directory "/var/named/dynamic";
};
#include "/etc/named.rfc1912.zones";
include "/etc/named.root.key";
include "/etc/named.zones.override.fr";
logging {
channel default_log {
file "data/named.run" versions 5 size 30m;
severity debug;
print-time yes;
print-severity yes;
print-category yes;
};
category default { default_log; };
category queries { default_log; };
};
我用 检查了配置named-checkconf -z，看起来不错。下面是 netstat：
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN 25 54195107 13451/named
tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN 25 54195112 13451/named
tcp 0 0 ::1:53 :::* LISTEN 25 54195109 13451/named
tcp 0 0 ::1:953 :::* LISTEN 25 54195113 13451/named
udp 0 0 127.0.0.1:53 0.0.0.0:* 25 54195106 13451/named
udp 0 0 ::1:53 :::* 25 54195108 13451/named
以下是我的测试结果：
nslookup google.com 127.0.0.1
;; connection timed out; trying next origin
nslookup google.com MY.EXT.ERN.IP
;; connection timed out; trying next origin
任何帮助都值得感激，谢谢！
答案1
第一站停靠港口：
- 检查 /var/log/daemon.log
- 检查绑定日志
- 考虑在这里发布相关的日志
- 考虑使用 dig 代替 nslookup 例如
dig google.com @127.0.0.1