我正在EC2中运行一个DNS服务器,昨天当我检查我的计费仪表板并且本月发现1.86 TB的已用数据时它正在推动大约20mbps.这对我的小型项目实验室来说是个大账单.我从来没有注意到性能下降,也没有费心去设置流量阈值,但我现在已经花费了200美元的带宽费用.
似乎有人使用我的DNS服务器作为放大攻击的一部分,但是我不知道如何.
配置在下面.
// BBB.BBB.BBB.BBB = ns2.mydomain.com ip address
options {
listen-on port 53 { any; };
// 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-transfer { BBB.BBB.BBB.BBB; };
allow-query-cache { BBB.BBB.BBB.BBB; };
allow-query { any; };
allow-recursion { none; };
empty-zones-enable no;
forwarders { 8.8.8.8; 8.8.4.4; };
fetch-glue no;
recursion no;
dnssec-enable yes;
dnssec-validation yes;
/* Path to ISC DLV key */
bindkeys-file "/etc/named.iscdlv.key";
managed-keys-directory "/var/named/dynamic";
};
logging {
channel default_debug {
file "data/named.run";
severity dynamic;
};
};
zone "." IN {
type hint;
file "named.ca";
};
zone "mydomain.com" IN {
type master;
file "zones/mydomain.com";
allow-transfer { BBB.BBB.BBB.BBB; localhost; };
};
鉴于这种配置,我不应该回答任何关于区域的查询我不在本地托管吗？这个服务器是几个域的SOA,但不用于查看我的其他服务器(每个人都针对OpenDNS或Google).我在这里有什么指示错误,还是我忘了？我的日志(63MB)充满了这个：
client 58.215.173.155#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 58.215.173.155#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 58.215.173.155#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 58.215.173.155#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 58.215.173.155#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 58.215.173.155#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 218.93.206.228#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 218.93.206.228#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 218.93.206.228#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 218.93.206.228#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 218.93.206.228#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 218.93.206.228#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 50.19.220.154#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 50.19.220.154#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 50.19.220.154#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 50.19.220.154#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 50.19.220.154#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 50.19.220.154#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 123.207.161.124#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 123.207.161.124#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 123.207.161.124#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 123.207.161.124#4444: query (cache) 'cpsc.gov/ANY/IN' denied client 123.207.161.124#4444: query (cache) 'cpsc.gov/ANY/IN' denied
