PTR\uff08\u6307\u6a19\uff09\u8a18\u9304\u7684\u4f5c\u7528\u8207A\u8a18\u9304\u76f8\u53cd – \u5b83\u5c07IP\u4f4d\u5740\u5c0d\u61c9\u5230\u4e3b\u6a5f\u540d\u7a31\u3002\u53ef\u4ee5\u5c07\u5176\u8996\u70ba\u4f3a\u670d\u5668\u7684\u6578\u4f4d\u8eab\u5206\u8b49\u3002\u7576\u4f3a\u670d\u5668\u767c\u9001\u96fb\u5b50\u90f5\u4ef6\u6642\uff0c\u63a5\u6536\u90f5\u4ef6\u4f3a\u670d\u5668\u6703\u57f7\u884c\u53cd\u5411DNS\u67e5\u8a62\u4ee5\u9a57\u8b49\u4f3a\u670d\u5668\u7684\u8eab\u5206\u3002<\/p>\n

PTR\u8a18\u9304\u683c\u5f0f\u7bc4\u4f8b\uff1a
\n IP\u4f4d\u5740 \u2192 \u4e3b\u6a5f\u540d\u7a31
\n 192.0.2.1 \u2192 server1.yourdomain.com<\/p>\n<\/div>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n

\u8a2d\u5b9aPTR\u8a18\u9304\u7684\u5148\u6c7a\u689d\u4ef6<\/strong><\/h2>\n
\u5728\u958b\u59cb\u8a2d\u5b9a\u4e4b\u524d\uff0c\u8acb\u78ba\u4fdd\u60a8\u5177\u5099\uff1a<\/p>\n
\n
DNS\u8a2d\u5b9a\u7684\u7ba1\u7406\u6b0a\u9650<\/li>\n
\u4f3a\u670d\u5668\u7684IP\u4f4d\u5740<\/li>\n
\u4f3a\u670d\u5668\u7684\u6709\u6548\u4e3b\u6a5f\u540d\u7a31<\/li>\n
\u4f3a\u670d\u5668\u79df\u7528\u63d0\u4f9b\u5546\u7684\u9069\u7576\u6388\u6b0a<\/li>\n<\/ul>\n
[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n
PTR\u8a18\u9304\u8a2d\u5b9a\u6b65\u9a5f<\/strong><\/h2>\n
\u8b93\u6211\u5011\u900f\u904e\u4e0d\u540c\u7684\u4f3a\u670d\u5668\u79df\u7528\u5834\u666f\u4f86\u4e86\u89e3\u9019\u500b\u6d41\u7a0b\uff1a<\/p>\n
1. \u547d\u4ee4\u5217\u9a57\u8b49\uff08\u8a2d\u5b9a\u524d\uff09<\/h3>\n
$ dig -x 192.0.2.1 +short\r\n# \u5982\u679c\u672a\u8a2d\u5b9a\uff0c\u61c9\u8fd4\u56de\u60a8\u60f3\u8981\u7684\u4e3b\u6a5f\u540d\u7a31\u6216\u7121\u8fd4\u56de\u7d50\u679c<\/code><\/pre>\n2. \u4f7f\u7528\u4e3b\u8981\u63d0\u4f9b\u5546\u8a2d\u5b9aPTR\u8a18\u9304<\/h3>\n\u5c0d\u65bcAWS EC2\u57f7\u884c\u500b\u9ad4\uff1a<\/p>\n # \u4f7f\u7528AWS CLI\r\naws ec2 modify-instance-attribute \\\r\n --instance-id i-1234567890abcdef0 \\\r\n --instance-initiated-shutdown-behavior terminate<\/code><\/pre>\n\u5c0d\u65bcLinux\u7cfb\u7d71\uff08\u6aa2\u67e5\u76ee\u524dPTR\uff09\uff1a<\/p>\n $ host 192.0.2.1\r\n# \u6216\r\n$ nslookup 192.0.2.1<\/code><\/pre>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n \u9a57\u8b49PTR\u8a18\u9304\u8a2d\u5b9a<\/strong><\/h2>\n\u8a2d\u5b9aPTR\u8a18\u9304\u5f8c\uff0c\u9a57\u8b49\u81f3\u95dc\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u5168\u9762\u7684\u6e2c\u8a66\u65b9\u6cd5\uff1a<\/p>\n # \u4f7f\u7528dig\u9a57\u8b49PTR\r\ndig -x YOUR_IP_ADDRESS +short\r\n\r\n# \u4f7f\u7528host\u547d\u4ee4\r\nhost YOUR_IP_ADDRESS\r\n\r\n# \u6e2c\u8a66\u96fb\u5b50\u90f5\u4ef6\u8a2d\u5b9a\r\ntelnet gmail-smtp-in.l.google.com 25<\/code><\/pre>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n PTR\u8a18\u9304\u7ba1\u7406\u6700\u4f73\u5be6\u52d9<\/strong><\/h2>\n\u5be6\u65bd\u4ee5\u4e0b\u6700\u4f73\u5be6\u52d9\u5c07\u6709\u52a9\u65bc\u7dad\u8b77\u6700\u4f73\u7684\u4f3a\u670d\u5668\u8072\u8b7d\u548c\u96fb\u5b50\u90f5\u4ef6\u50b3\u905e\u80fd\u529b\uff1a<\/p>\n \n\u78ba\u4fddPTR\u8a18\u9304\u8207\u4f3a\u670d\u5668\u4e3b\u6a5f\u540d\u7a31\u5339\u914d\uff08\u524d\u5411\u78ba\u8a8d\u53cd\u5411DNS\uff09<\/li>\n \u5728PTR\u8a18\u9304\u4e2d\u4f7f\u7528\u5b8c\u5168\u9650\u5b9a\u7db2\u57df\u540d\u7a31\uff08FQDN\uff09<\/li>\n \u5728\u6574\u500b\u57fa\u790e\u8a2d\u65bd\u4e2d\u4fdd\u6301\u4e00\u81f4\u7684\u547d\u540d\u6163\u4f8b<\/li>\n \u5b9a\u671f\u9a57\u8b49PTR\u8a18\u9304\u72c0\u614b<\/li>\n<\/ul>\n\n\u5c08\u696d\u63d0\u793a\uff1a<\/strong>\u8a31\u591a\u96fb\u5b50\u90f5\u4ef6\u63d0\u4f9b\u5546\u8981\u6c42PTR\u8a18\u9304\u548cA\u8a18\u9304\u76f8\u5339\u914d\u3002\u9019\u7a2e\u8a2d\u5b9a\u7a31\u70baFCrDNS\uff08\u524d\u5411\u78ba\u8a8d\u53cd\u5411DNS\uff09\uff0c\u53ef\u986f\u8457\u63d0\u9ad8\u96fb\u5b50\u90f5\u4ef6\u50b3\u905e\u80fd\u529b\u3002<\/p>\n<\/div>\n [\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n \u5e38\u898bPTR\u8a18\u9304\u554f\u984c\u6545\u969c\u6392\u9664<\/strong><\/h2>\n\u9047\u5230PTR\u8a18\u9304\u554f\u984c\u6642\uff0c\u8acb\u9075\u5faa\u4ee5\u4e0b\u7cfb\u7d71\u6027\u9664\u932f\u65b9\u6cd5\uff1a<\/p>\n # 1. \u6aa2\u67e5\u76ee\u524dPTR\u8a18\u9304\r\ndig -x YOUR_IP_ADDRESS +short\r\n\r\n# 2. \u9a57\u8b49A\u8a18\u9304\u662f\u5426\u5339\u914d\r\ndig HOSTNAME +short\r\n\r\n# 3. \u6e2c\u8a66\u90f5\u4ef6\u4f3a\u670d\u5668\u8a2d\u5b9a\r\nopenssl s_client -connect mail.example.com:587 -starttls smtp<\/code><\/pre>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row el_class=”blog-detail-section”][vc_column][vc_column_text]<\/p>\n \u5e38\u898b\u554f\u984c\u548c\u89e3\u6c7a\u65b9\u6848\u77e9\u9663<\/strong><\/h2>\n