【文章內(nèi)容簡(jiǎn)介】 實(shí)驗(yàn)、利用 NBAR 創(chuàng)建 PDLM ip nbar custom feng01 tcp 1524 27665 ip nbar custom feng02 udp 31335 27444 上面所建立的就是一個(gè) DDOS 的攻擊特性 r2(config)classmap DDOS r2(configcmap)match protocol feng01 r2(configcmap)match protocol feng02 r2(config)policymap DDOSDENY r2(configpmap)class DDOS r2(configpmapc)drop r2(configpmap)int s1/0 r2(configif)servicepolicy in DDOSDENY 實(shí)驗(yàn)、利用下載的 PDLM 做過(guò)濾 R1(config)ip nbar pdlm // 是 tftp 服 務(wù)器的地址 需求：干掉 bt 下載，你從 cisco 網(wǎng)站，下載一個(gè) bt 的 pdlm，copy 你的路由器的 flash *你們可以下去下載各種 PDLM 實(shí)驗(yàn)二、利用 PBR 來(lái)做分類 1. 需求：客戶希望 voip 的流量的優(yōu)先級(jí)為 5， HTTP 的流量?jī)?yōu)先級(jí)為4， tel 的流量?jī)?yōu)先級(jí)為 3， ftp 的流量?jī)?yōu)先級(jí)為 2，其他的流量?jī)?yōu)先級(jí)為 1. 2. 把上面的場(chǎng)景搭建出來(lái)，并且配置好流量發(fā)生。 3. 利用訪問(wèn)控制列表來(lái)抓取這個(gè)流量 r2sh accesslist Extended IP access list 101 10 permit ip host host （抓取的是 voip 的流量） Extended IP access list 102 10 permit tcp any any eq （抓取的 流量） Extended IP access list 103 10 permit tcp any any eq tel （抓取的 tel 流量） Extended IP access list 104 10 permit tcp any any eq ftpdata （抓取的是 ftp 流量） 20 permit tcp any any eq ftp PBR 來(lái)進(jìn)行優(yōu)先級(jí)的配置 r2sh routemap fxh 名稱叫 fxh routemap fxh, permit, sequence 10 第一條策略，序號(hào)為 10 Match clauses: ip address (accesslists): 101 抓取的 acl 是 101 Set clauses: ip precedence critical 設(shè)置的優(yōu)先級(jí)為 5 Policy routing matches: 0 packets, 0 bytes （ 0 代表是策略沒有起作用） routemap fxh, permit, sequence 20 Match clauses: ip address (accesslists): 102 Set clauses: ip precedence flashoverride Policy routing matches: 0 packets, 0 bytes routemap fxh, permit, sequence 30 Match clauses: ip address (accesslists): 103 Set clauses: ip precedence flash Policy routing matches: 0 packets, 0 bytes routemap fxh, permit, sequence 40 Match clauses: ip address (accesslists): 104 Set clauses: ip precedence immediate Policy routing matches: 0 packets, 0 bytes routemap fxh, permit, sequence 50 Match clauses: Set clauses: ip precedence priority Policy routing matches: 0 packets, 0 bytes 4. 調(diào)用到接口上 r2(config)int s1/0 r2(configif)ip policy routemap fxh 5. 測(cè)試一下配置的結(jié)果 r2sh routemap routemap fxh, permit, sequence 10 Match clauses: ip address (accesslists): 101 Set clauses: ip precedence critical Policy routing matches: 0 packets, 0 bytes routemap fxh, permit, sequence 20 Match clauses: ip address (accesslists): 102 Set clauses: ip precedence flashoverride Policy routing matches: 10 packets, 505 bytes routemap fxh, permit, sequence 30 Match clauses: ip address (accesslists): 103 Set clauses: ip precedence flash Policy routing matches: 4 packets, 180 bytes routemap fxh, permit, sequence 40 Match clauses: ip address (accesslists): 104 Set clauses: ip precedence immediate Policy routing matches: 2 packets, 96 bytes routemap fxh, permit, sequence 50 Match clauses: Set clauses: ip precedence priority Policy routing matches: 8231 packets, 2033573 bytes 6. 查詢 cef 快速轉(zhuǎn)發(fā)的命令： r1sh adjacency detail 查詢我們的 CEF 的鄰居信息，后面必須跟detail 參數(shù) Protocol Interface Address IP Serial1/0 point2point(15) 0 packets, 0 bytes 0F000800 CEF expires: 00:02:01 refresh: 00:00:01 Epoch: 0 r1sh ip cef 查詢的是快速轉(zhuǎn)發(fā)表，注意后面的參數(shù) 試驗(yàn)三、 QPPB 的一個(gè)試驗(yàn) 試驗(yàn)步驟： 1. 配置鏈路層 r1 r1 r1 r1 r1sh run Building configuration... Current configuration : 1419 bytes ! version service timestamps debug datetime msec service timestamps log datetime msec no service passwordencryption ! hostname r1 ! bootstartmarker bootendmarker ! enable password cisco ! no aaa newmodel memorysize iomem 5 ip cef ! ! ! ! no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address ! interface FastEther0/0 no ip address shutdown duplex auto speed auto ! interface FastEther0/1 no ip address shutdown duplex auto speed auto ! interface Serial1/0 ip address serial restartdelay 0 ! interface Serial1/1 no ip address shutdown serial restartdelay 0 ! interface Serial1/2 no ip address shutdown serial restartdelay 0 ! interface Serial1/3 no ip address shutdown serial restartdelay 0 ! ! router ospf 100 routerid logadjacencychanges work area 0 ! router bgp 24 no synchronization bgp routerid bgp logneighborchanges neighbor remoteas 12 no autosummary ! ! ! ip server no ip secureserver ! ! ! ! ! controlplane ! ! ! ! ! ! ! ! ! alias exec a sh ip int brief alias exec b sh ip route alias exec c sh ip route rip alias exec d sh run ! line con 0 exectimeout 0 0 logging synchronous line aux 0 exectimeout 0 0 logging synchronous line vty 0 4 exectimeout 0 0 password cisco login ! ! End r2sh run Building configuration... Current configuration : 1465 bytes ! version service timestamps debug datetime msec service timestamps log datetime msec no service passwordencryption ! hostname r2 ! bootstartmarker bootendmarker ! enable password cisco ! no aaa newmodel memorysize iomem 5 ip cef ! ! ! ! no ip domain lookup ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface Loopback0 ip address ! interface FastEther0/0 no ip address shutdown duplex aut