how-to block ads
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sdd75
join:2001-10-14
Maryville, TN
1 edit | common sense
Lease private ip's to all customers initially. (If the ISP does not want the customer to run a server, then that is the easiest way to enforce the rule so to speak. It avoids the touchy issue of account termination.)
It would be hard to relay off a computer that isn't publicly routable.
Perform stateful packet inspection on port 25. Log all outbound requests, and send a weekly email to the customer containing the information. The default address is the customer's primary address. (Viruses don't have to 'relay') This would appear more as a service to the customer rather than aggressive enforcement of vague policy. Offer the customer the option of blocking port 25 at the ISP level. This would allow the person who is actually advertising via email to continue to work. If someone is intentionally sending numrous emails, thus electing to leave port 25 unblocked, the report should include a polite warning that complaints made against the account will be reviewed and will potentially result in an ISP enforced block of port 25 on that account. Hey, the ISP wants to make money too. It does them no good to just cancel accounts.
The customer pays a little extra for a public and static ip. Port 25 is still inspected.
This would require almost zero additional resources. | |
cbs228
Geeks Of The World, Unite
join:2000-09-04
Saint Louis, MO
| There are some protocols which simply don't play nice with NAT, and giving users a non-routable IP address is bound to complicate things. For instance, IM-client file transfers or almost any IM function other than chat might not work. RTSP streams could not be set up for videoconferencing. Customers could not make VPN connections. Although UPnP can mitigate this somewhat, it won't fix everything. Could ISPs even claim to offer internet access, since it wouldn't work as it should? I, for one, would not pay for broken internet service only to pay more to have it unbroken.
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"If you stare too long into the abyss the abyss stares back at you." -Nietzsche
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