network management with mail

[dmalamba]

I Have a 64 k line which i am using for

connecting to the internet so that poeple

can send and receive mail through microsoftexchange server 5.5. I have implemented NAT

and access-list to permit mail through the

NAT interface. What stratles me is that the

64 k line seems to be at peak use all the time

and I dont believe this is the mail traffic

which is causing this. How can I check traffic typeS

passing through this interface and their port numbers

so i can block them? i.e only accept pop3 and smtp and probably www.

[zafeirop]

Hi there.

You can start viewing IOS commands, concerning the debugging of IP protocol suite, by typing

debug ip packet ?

debug ip packet detail ?

and you should of course use some output modifiers like | or whatever else the IOS provides with the particular command.

Once you are ensured that the bulk traffic is not your interesting traffic you should go on applying ACLs to the isdn bri interface which is in use

Regards

Anastasios Zafiropoulos

Greece