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Bock Outgoing Ports on Cisco 678

Can someone please help with the config on my Cisco 678.

Our domain is currently being blacklisted. My guess is one of our machines is infected with a mailer worm. I need to buy myself some time to find the machine. I think the best way to prevent this is to block all SMTP traffic going out except the Mail Server itself.

I haven't been able to find the command on the net.

Thanks in advance for any information.

1 REPLY

Re: Bock Outgoing Ports on Cisco 678

I feel you can do this by configuring access lists on router.

access-list 101 permit tcp 10.1.1.1 eq 80 any

access-list 101 deny tcp any eq 80 any

access-list 101 permit ip any any

int fa0/0

access-group 101 in

i have assumed IP of mail server is 10.1.1.1 and fa0/0 interface of router is connected to inside LAN. you can replace these with actuals.

hope this URL will give you more information on ACLs.

http://www.cisco.com/en/US/products/sw/secursw/ps1018/products_tech_note09186a00800a5b9a.shtml

rate if it helps ...

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