从入门到精通：构建SSH安全通道

　2009-03-20 13:57:46　来源：WEB开发网　　　

核心提示： 192.168.1.20ssh-rsa^4rsa5jmjones6cd7jmjones8^/^9cd10^+9^11yc12yc13rsa14AAAAB15^+^16rsa17AAAAB18^99u2^19oT20oT21^7N7^22AAAAB23^+^24cd25^5f+^26ykuw

192.168.1.20　ssh-rsa　 ^4rsa5jmjones6cd7jmjones8^/^9cd10^+9^11yc12yc13rsa14AAAAB15^+^16r sa17AAAAB18^99u2^19oT20oT21^7N7^22AAAAB23^+^24cd25^5f+^26ykuwQcXI 27EAAAABIwAAAQEAvb28jmjones29oT30commandline31^2Ax3J88^32commandl ine33yc34^+rOB+gOdRaD+NTkuzrB/^38oT39^50L6^40oT41AAAAB42^61rq+9v+4^ 44AAAAB45rsa46ykuwQcXI47^5q1P11^48AAAAB49gcgPr50^==

在笔者再次连接到同样的服务器时，笔者的SSH客户端将检查“known_hosts”文件，检查是否与上次的服务器相同。如果服务器传回的信息与“known_hosts”文件中的信息不匹配，就会看到类似于下面的消息：

abc:~　jmjones$　ssh　192.168.1.20 WARNING:　REMOTE　HOST　IDENTIFICATION　HAS　CHANGED!　　　　 IT　IS　POSSIBLE　THAT　SOMEONE　IS　DOING　SOMETHING　NASTY! Someone　could　be　eavesdropping　on　you　right　now　(man-in-the-middle　attack)! It　is　also　possible　that　the　RSA　host　key　has　just　been　changed. The　fingerprint　for　the　RSA　key　sent　by　the　remote　host　is 24:1e:2e:7c:3d:a5:cd:a3:3d:71:1f:6d:08:3b:8c:93. Please　contact　your　system　administrator. Add　correct　host　key　in　/Users/jmjones/.ssh/known_hosts　to　get　rid　of　this　message. Offending　key　in　/Users/jmjones/.ssh/known_hosts:1 RSA　host　key　for　192.168.1.20　has　changed　and　you　have　requested　strict　checking. Host　key　verification　failed.