文件名称：在路由器上过滤vty-CCNA中文版PPT
文件大小：10.75MB
文件格式：PPT
更新时间：2024-05-15 11:39:41
CCNA
在路由器上过滤vty
五个VTY (0 到 4)
路由器的vty端口可以过滤连接
在路由器上执行vty访问的控制
0
1
2
3
4
Virtual ports (vty 0 through 4)
Physical port e0 (Telnet)
Console port (direct connect)
console
e0
*
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Purpose:
Emphasize: Instead of applying a standard access-list to a physical interface, now we will apply a standard access-list to the router’s vty ports. A vty port is a logical port on the router that can accept telnet sessions.
Note:
Access-class is used to filter incoming telnet session into the router’s vty ports and to filter outgoing telnet session from the router’s vty port.
Access-class always use standard access-list to match the source address of the incoming telnet session and the destination address of the outgoing telnet session.
The 2500 series router by default has 5 vty ports (vty 0 through 4).
To configure more vty ports, use the following global configuration command:
RouterB(config)#line vty 0 ?
<1-188> Last Line number