{"id":910,"date":"2022-08-31T19:55:49","date_gmt":"2022-11-20T02:52:47","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/linux-unix%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8btelnet%e3%82%b3%e3%83%9e%e3%83%b3%e3%83%89%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-01T03:28:04","modified_gmt":"2025-07-31T18:28:04","slug":"linux-unix%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8btelnet%e3%82%b3%e3%83%9e%e3%83%b3%e3%83%89%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/linux-unix%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8btelnet%e3%82%b3%e3%83%9e%e3%83%b3%e3%83%89%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/","title":{"rendered":"Linux\/Unix\u306b\u304a\u3051\u308bTelnet\u30b3\u30de\u30f3\u30c9\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<h2>\u300cTelnet\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\u300d<\/h2>\n<p>Telnet\u306f\u3001TCP\/IP\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4ecb\u3057\u3066\u30ea\u30e2\u30fc\u30c8\u30b7\u30b9\u30c6\u30e0\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u53e4\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002Telnet\u306f\u3001\u30dd\u30fc\u30c823\u3092\u901a\u3058\u3066\u30b5\u30fc\u30d0\u30fc\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306b\u63a5\u7d9a\u3057\u307e\u3059\u3002Telnet\u30b3\u30de\u30f3\u30c9\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u514d\u8cac\u4e8b\u9805<\/h2>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>Telnet\u306f\u5b89\u5168\u306a\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u306f\u306a\u304f\u3001\u3057\u305f\u304c\u3063\u3066\u304a\u3059\u3059\u3081\u3055\u308c\u307e\u305b\u3093\u3002\u306a\u305c\u306a\u3089\u3001\u3053\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u9001\u4fe1\u3055\u308c\u308b\u30c7\u30fc\u30bf\u306f\u6697\u53f7\u5316\u3055\u308c\u305a\u3001\u30cf\u30c3\u30ab\u30fc\u306b\u3088\u3063\u3066\u508d\u53d7\u3055\u308c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u304b\u3089\u3067\u3059\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>Telnet\u306e\u4ee3\u308f\u308a\u306b\u3001\u3088\u308a\u597d\u307e\u3057\u3044\u30d7\u30ed\u30c8\u30b3\u30eb\u3068\u3057\u3066SSH\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u63a8\u5968\u3055\u308c\u307e\u3059\u3002SSH\u306f\u6697\u53f7\u5316\u3055\u308c\u3066\u304a\u308a\u3001\u3088\u308a\u5b89\u5168\u3067\u3059\u3002<\/ol>\n<p>\u3055\u3066\u3001telnet\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3068\u4f7f\u7528\u65b9\u6cd5\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>Telnet\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3002<\/h2>\n<p>\u3053\u306e\u30bb\u30af\u30b7\u30e7\u30f3\u3067\u306f\u3001RPM\u304a\u3088\u3073DEB\u30b7\u30b9\u30c6\u30e0\u3067\u306etelnet\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30d7\u30ed\u30bb\u30b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h3>CentOS 7 \/ RHEL 7 \u306b\u304a\u3051\u308b Telnet \u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h3>\n<p>\u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30d7\u30ed\u30bb\u30b9\u3092\u958b\u59cb\u3059\u308b\u305f\u3081\u306b\u3001\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code># yum install telnet telnet-server -y\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/10-0.png\" alt=\"Install Telnet Telnet Server\" \/><\/div>\n<pre class=\"post-pre\"><code> \r\n# systemctl start telnet.socket\r\n# systemctl enable telnet.socket\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/12-0.png\" alt=\"Start And Enable Telnet\" \/><\/div>\n<pre class=\"post-pre\"><code># firewall-cmd --permanent --add-port=23\/tcp\r\n<\/code><\/pre>\n<p>\u6700\u5f8c\u306b\u3001\u30eb\u30fc\u30eb\u304c\u6709\u52b9\u306b\u306a\u308b\u3088\u3046\u306b\u30d5\u30a1\u30a4\u30a2\u30a6\u30a9\u30fc\u30eb\u3092\u518d\u8aad\u307f\u8fbc\u307f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code># firewall-cmd --reload\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/16-0.png\" alt=\"Allow Port 23 Over Firewall\" \/><\/div>\n<pre class=\"post-pre\"><code># systemctl status telnet.socket\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/18-0.png\" alt=\"Check Status Of Telnet In CentOS 7\" \/><\/div>\n<h3>\u30ed\u30b0\u30a4\u30f3\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3059\u308b\u3002<\/h3>\n<p>\u3053\u306e\u4f8b\u3067\u306f\u3001telnet\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u4f7f\u7528\u3057\u3066\u30ed\u30b0\u30a4\u30f3\u3059\u308b\u305f\u3081\u306e\u30ed\u30b0\u30a4\u30f3\u30e6\u30fc\u30b6\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code># adduser telnetuser\r\n<\/code><\/pre>\n<p>\u30e6\u30fc\u30b6\u30fc\u306e\u305f\u3081\u306b\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code># passwd telnetuser\r\n<\/code><\/pre>\n<p>\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u6307\u5b9a\u3057\u3001\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b5\u30fc\u30d0\u30fc\u3078\u30ed\u30b0\u30a4\u30f3\u3059\u308b\u305f\u3081\u306btelnet\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>$ telnet server-IP address\r\n<\/code><\/pre>\n<p>\u305f\u3068\u3048\u3070<\/p>\n<pre class=\"post-pre\"><code>$ telnet 38.76.11.19\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/28-2.png\" alt=\"Logging In To Centos Via Telnet In Putty\" \/><\/div>\n<h3>Ubuntu 18.04\u3078\u306eTelnet\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h3>\n<p>Ubuntu 18.04\u306b\u3066\u3001telnet\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>$ sudo apt install telnetd -y\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/32-0.png\" alt=\"Install Telnet On Ubuntu\" \/><\/div>\n<pre class=\"post-pre\"><code>$ systemctl status inetd\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/34-0.png\" alt=\"Systemctl Status Inetd\" \/><\/div>\n<pre class=\"post-pre\"><code>$ ufw allow 23\/tcp\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/36-0.png\" alt=\"Allow Port 23 Over Ufw Firewall\" \/><\/div>\n<pre class=\"post-pre\"><code>$ ufw reload\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/38-0.png\" alt=\"Reload ufw Firewall\" \/><\/div>\n<h2>\u30aa\u30fc\u30d7\u30f3\u30dd\u30fc\u30c8\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u305f\u3081\u306b\u3001Telnet\u3092\u4f7f\u7528\u3059\u308b\u3002<\/h2>\n<p>\u7279\u5b9a\u306e\u30b5\u30fc\u30d0\u30fc\u4e0a\u3067\u7279\u5b9a\u306e\u30dd\u30fc\u30c8\u304c\u958b\u3044\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u305f\u3081\u306b\u3001Telnet\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>$ telnet server-IP port\r\n<\/code><\/pre>\n<p>\u305f\u3068\u3048\u3070\u3001\u30b5\u30fc\u30d0\u30fc\u3067\u30dd\u30fc\u30c822\u304c\u958b\u3044\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code>$ telnet 38.76.11.19  22\r\n<\/code><\/pre>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/6564a0c8daa94e2bdf7c290a\/44-0.png\" alt=\"Telnet To Test Open Ports\" \/><\/div>\n<h2>\u8981\u7d04: \u305f\u3060\u4e00\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3067\u4ee5\u4e0b\u3092\u65e5\u672c\u8a9e\u3067\u81ea\u7136\u306b\u8a00\u3044\u63db\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/h2>\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u306f\u3001telnet\u30d7\u30ed\u30c8\u30b3\u30eb\u306e\u4f7f\u7528\u65b9\u6cd5\u3092\u793a\u3059\u6559\u80b2\u30ac\u30a4\u30c9\u3067\u3059\u3002\u79c1\u305f\u3061\u306f\u3001\u6697\u53f7\u5316\u304c\u4e0d\u5341\u5206\u306a\u305f\u3081\u9ad8\u3044\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u304c\u3042\u308b\u305f\u3081\u3001telnet\u306e\u4f7f\u7528\u3092\u5f37\u304f\u63a8\u5968\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u30ea\u30e2\u30fc\u30c8\u30b7\u30b9\u30c6\u30e0\u3078\u306e\u63a5\u7d9a\u6642\u306b\u306f\u3001SSH\u304c\u63a8\u5968\u3055\u308c\u308b\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002SSH\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u306f\u6697\u53f7\u5316\u3055\u308c\u3001\u30cf\u30c3\u30ab\u30fc\u304b\u3089\u5b89\u5168\u306b\u4fdd\u8b77\u3055\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u300cTelnet\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f\u300d Telnet\u306f\u3001TCP\/IP\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3092\u4ecb\u3057\u3066\u30ea\u30e2\u30fc\u30c8\u30b7\u30b9\u30c6\u30e0\u306b\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u53e4\u3044\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002Telnet\u306f\u3001\u30dd\u30fc\u30c823\u3092\u901a\u3058\u3066\u30b5\u30fc\u30d0\u30fc\u3084\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u306b\u63a5\u7d9a [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[16,26],"class_list":["post-910","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-16","tag-26"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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