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| 作者：不明 来源：www.pccode.net 整理 发布时间：2007-1-24 15:24:04 发布人：wongrs | |
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und a print server as type 7. r2(config)#access-list 1000 deny 4dddd 7 r2(config)#access-list 1000 permit -1 r2(config)#int s0/0 r2(config-if)#ipx output-sap-filter 1000 r2(config-if)#^Z Is this access-list actually applied? Performing a "show ipx interface s0/0" proves it. r2>sh ipx interface s0/0 Serial0/0 is up, line protocol is up IPX address is 3D.0050.5009.fac0 [up] Delay of this IPX network, in ticks is 6 throughput 0 link delay 0 IPXWAN processing not enabled on this interface. IPX SAP update interval is 60 seconds IPX type 20 propagation packet forwarding is disabled Incoming access list is not set Outgoing access list is not set IPX helper access list is not set SAP GNS processing enabled, delay 0 ms, output filter list is not set SAP Input filter list is not set SAP Output filter list is 1000 SAP Router filter list is not set Input filter list is not set Output filter list is not set Router filter list is not set Netbios Input host access list is not set Netbios Input bytes access list is not set Netbios Output host access list is not set Netbios Output bytes access list is not set Updates each 60 seconds aging multiples RIP: 3 SAP: 3 SAP interpacket delay is 55 ms, maximum size is 480 bytes RIP interpacket delay is 55 ms, maximum size is 432 bytes RIP response delay is not set Watchdog processing is disabled, SPX spoofing is disabled, idle time 60 IPX accounting is disabled IPX fast switching is configured (enabled) RIP packets received 0, RIP packets sent 1 SAP packets received 0, SAP packets sent 1 Now on to the last item. IP traffic filtering. First lets make this access-list. R1(config)#access-list 100 permit tcp 172.16.1.0 0.0.0.255 host 172.16.2.200 eq pop3 R1(config)#access-list 100 permit tcp 172.16.1.0 0.0.0.255 host 172.16.2.200 eq www R1(config)#access-list 100 permit tcp 172.16.1.0 0.0.0.255 host 172.16.2.200 eq smtp What is that weird mask? That is called an inverse mask. A simple way to calculate it is to subtract the mask from 255.255.255.255. For example a mask of 255.255.255.0 would come out to 0.0.0.255. And a mask of 255.255.255.240 would come out to 0.0.0.15. L
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