关于客户端登录验证的问题。我们在客户端上连结Telnet服务器时,经常会看到这样的错误信息:
Server allows NTLM authentication only
Server has closed connection
这是因为默认情况下,win2000的Telnet服务使用NTLM的验证方式,这种验证方式避免了明文密码的传送,提高了安全性。但是win98、nt4.0等系统的Telnet客户端客户端不支持这种方式,这样就带来了不便。有时我们希望在登录Telnet时,提示我们输入用户名和密码,那我们可以这样设置:
开始菜单|程序|管理工具|Telnet服务器管理(或者运行tlntadmn),选择3 显示/更改注册表设置,然后选择7 NTLM,进行修改。可接受的值为0-2,2是NTLM only,0是NTLM not available,1是二者都支持,默认值是2。修改后需要重新启动Telnet服务。
为了提高安全性,有时我们也在服务器端修改服务的默认端口号,这样客户机连结时就需要提供端口号信息了。修改的方法是:
开始菜单|程序|管理工具|Telnet服务器管理,选择3 显示/更改注册表设置,然后选择8 Telnetport,输入你要设置的端口号。注意输入的端口号不要和你的服务器上正在使用的端口冲突。修改后同样需要重新启动Telnet服务。
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