流量检测的几种方案

来源：Cisco网站作者：出处：巧巧读书 2005-08-22 进入讨论组

　　三、NBAR

1、配置方法

router(config)# interface FastEthernet 0/1

router(config-if)# ip nbar protocol discovery

router# show ip nbar protocol -discovery interface FastEthernet 6/0

FastEthernet6/0

Input Output

Protocol Packet Count Packet Count

Byte Count Byte Count

5 minute bit rate (bps) 5 minute bit rate (bps)

------------------------ ------------------------ ------------------------

http 316773 0

26340105 0

3000 0

pop3 4437 7367

2301891 339213

3000 0

snmp 279538 14644

319106191 673624

0 0

…

Total 17203819 151684936

19161397327 50967034611

4179000 6620000

2、说明

● NBAR识别从4层到7层的协议信息

●可以基于端口统计input 和output 的bit rate (bps), packet counts, byte counts

● 只能在cef或dcef的基础上运行

● 不象netflow，没有流的概念。主要是统计目前网络中有那一些应用

四、access-list log

1、配置方法

router(config)# access-list 118 permit ip any any log

router(config)# interface FastEthernet 0/1

router(config-if)# ip access-group 118 out

router# show log

router>sh log

Syslog logging: enabled (0 messages dropped, 0 messages rate-limited, 0 flushes,

0 overruns)

Console logging: level debugging, 79 messages logged

Monitor logging: level debugging, 0 messages logged

Buffer logging: level debugging, 79 messages logged

Logging Exception size (4096 bytes)

Trap logging: level informational, 83 message lines logged

Log Buffer (4096 bytes):

*May 25 05:27:50: %SEC-6-IPACCESSLOGP: list 118 permitted tcp 10.1.64.71(0) -> 10.0.29.3(0), 1 packet

*May 25 05:28:59: %SEC-6-IPACCESSLOGP: list 118 permitted tcp 10.1.64.71(0) -> 10.0.28.128(0), 1 packet

*May 25 05:29:19: %SEC-6-IPACCESSLOGP: list 118 permitted tcp 10.1.64.71(0) -> 10.0.29.3(0), 56 packets文字：http://www.qqread.com/net-case/l691293808.html进入讨论组讨论。