Cisco路由器auto secure命令小結
2009-01-11
路由器命令auto secure用起來比較方便，而且可以關閉一些不安全的服務和啟用一些安全的服務。這里對這個命令做了一個總結。(注:ios版本為:12.3(1)以上才支持使用)
總結如下:
1、關閉一些全局的不安全服務如下:
Finger
PAD
Small Servers
Bootp
HTTP service
Identification Service
CDP
NTP
Source Routing
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2、開啟一些全局的安全服務如下:
Password-encryption service
Tuning of scheduler interval/allocation
TCP synwait-time
TCP-keepalives-in and tcp-kepalives-out
SPD configuration
No ip unreachables for null 0
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3、關閉接口的一些不安全服務如下:
ICMP
Proxy-Arp
Directed Broadcast
Disables MOP service
Disables icmp unreachables
Disables icmp mask reply messages.
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4、提供日志安全如下:
Enables sequence numbers & timestamp
Provides a console log
Sets log buffered size
Provides an interactive dialogue to configure the logging server ip address.
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5、保護訪問路由器如下:
Checks for a banner and provides facility to add text to automatically configure:
Login and password
Transport input & output
Exec-timeout
Local AAA
SSH timeout and ssh authentication-retries to minimum number
Enable only SSH and SCP for access and file transfer to/from the router
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6、保護轉發Forwarding Plane
Enables Cisco Express Forwarding (CEF) or distributed CEF on the router， when available
Anti-spoofing
Blocks all IANA reserved IP address blocks
Blocks private address blocks if customer desires
Installs a default route to NULL 0， if a default route is not being used
Configures TCP intercept for connection-timeout， if TCP intercept feature is available and the user is interested
Starts interactive configuration for CBAC on interfaces facing the Internet， when using a Cisco IOS Firewall image，
Enables NetFlow on software forwarding platforms
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51CTO.com TEL：010-68476606)
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