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When configuring a complex access-list, can server be downed?

Router has a complex access-list for preventing worm & virus. When the router has these access-list configurations, servers connected router will be well operating.

But, If I delete these acces-list configuration, servers become downed.

I guess that the cause is these servers' insufficient cpu power & memory.

What do you think about that?

In fact, on the screen of sniffer, I see the message of 'ack too long, window frozen'. Network is connected through Gigabit ethernet and 6509 switch. So, these message says that slow response time is according to server.

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Re: When configuring a complex access-list, can server be downed

Yes, the server's insufficient cpu and memory may be one of the reasons. Also, to confirm this,I just want to know where did u apply this access-list configuration .Its on the inbound interface or outboud interface of the router.

Which router are u using?What is that server?

These informations will help to trace out the root cause of the problem.

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