[afnog] how to block spam activity on my router cisco 2600

[David Chima]

Paul
What I gather from you is that you use webmail from elsewhere other than from a server 
in your network.
If you really dont have a mail server, then it is simple. just block all smtp through 
your router. You can do this on your ethernet Interface

ip access-group 120 in

access-list 120 deny tcp any any eq smtp
access-list 120 permit ip any any

Or on your serial Interface You can put this line

ip access-group 120 out

The access-list 120 will apply to either of the interface you can choose

Regards

David

On Tue, 18 Oct 2005 04:56:22 -0700 (PDT), Paul wrote
> david,
> thanks for your resonse. let me say these, I don't have a mailserver on my 
> network but the whole office and the school library are natted together 
> through one global IP dat was on my router interface. and I also use all these 
> free webmail so I don't know where the spam activity is coming in from. but 
> will appreciate if you can help me out on the type of access-list command I 
> can use to stop this activity for now. thanks. Aj
> 
> David Chima <david at sdnp.org.mw> wrote:
> Paul,
> I think what works better is if you have a mailserver through which all mail 
> goes through. You can setup spam filters, virus scanners on this server. Your 
> router should only have an access-list that should only allow mail from that 
> mail-server and deny anything called smtp from any to any.
> 
> I hope you can begin this way.
> 
> Regards
> 
> David
> 
> On Mon, 17 Oct 2005 02:37:02 -0700 (PDT), Paul wrote
> > Good day all,
> > 
> > Please I need help on how to block spam activity from my cisco 2600 router. my 
> > uplink provider has been telling me of spam report coming from one of the 
> > ethernet interface on my router.
> > 
> > thanks
> > 
> > Aj
> > 
> > 
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Access your Malawi SDNP e-mail from anywhere in the world.
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