1 如何获取DNS服务器的版本信息
向某个DNS服务器发送下面的请求即可获得版本信息
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dig @115.124.17.156 version.bind chaos txt |
它返回的信息如下：
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; <<>> DiG 9.7.0-P2-RedHat-9.7.0-5.P2.el6 <<>> @115.124.17.156 version.bind chaos txt; (1 server found);; global options: +cmd;; Got answer:;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51568;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0;; WARNING: recursion requested but not available;; QUESTION SECTION:;version.bind.CHTXT;; ANSWER SECTION:version.bind. 0 CH TXT "9.8.1";; AUTHORITY SECTION:version.bind. 0 CH NS version.bind.;; Query time: 1 msec;; SERVER: 115.124.17.156#53(115.124.17.156);; WHEN: Tue Jun 3 11:39:24 2014;; MSG SIZE rcvd: 62 |
2 如何修改版本信息
在BIND中，您可以用version指令来修改版本信息。这可以让你的DNS服务器免于被利用BIND漏洞的 黑客攻击。
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option { #... version "I don‘t tell you my version."; #...}; |
原文：http://www.cnblogs.com/cobbliu/p/3765524.html