I thought based on what Tim says it was for failover and keep-alive purposes for non-cooperative routers. This means (unless I'm special) we're all being sent these packets (no registered softphone running). Since my phone service appear to work and I'm rejecting the packets I suspect I wont be very "failover" tolerant and I must have a cooperative router. I'd be most interested in anything Brandon may have to say.
Russell
Burris, I'm not sure I understand what you mean by "not the first problem". Do you mean that you don't have issue #1 in my message that you quoted? I believe PPPoE provides the credentials your DSL modem needs to let a device PC or router connect to it, so I'm not sure it's germane. My gut feeling is if you disable your router's firewall you're opening yourself up to being hacked - I believe, besides allowing multiple devices access the internet, providing that firewall is another advantage of using the router - I'm no expert. Others more knowledgeable may have a comment you disabling your router firewall.
Anyway, based on Tim's response it appears it's normal for us to be sent those messages (also, see my other response).
Russell
I believe that the router firewall causes problems. My third party firewall along with the NAT I believe takes good care of me. At the same time, my anti-virus scans real time.
I think that port forwarding and DMZ and keeping the ATA in front of the router is far more risky for intrusion.
Mind you, I'm no expert,but from my reading and real time experiences, I feel comfortable that my set up is ok and most important, it works.
I think we're on the same page here. I think of the NAT function as providing the firewall since by its nature devices on the private side are hidden from the public Internet by the router and (at a naive level) only responses to solicited requests are allowed through the NAT device back to the requester.
I do agree that the measures you have in place are very reasonable. I have similar measures in place with one exception. I've put another router between my first router and my main computer.
I also agree with you about port forwarding, putting a device in the DMZ and keeping the ATA in front of the router as all those are equivalent to exposing the device on the Internet.
Russell
The keep alive requests are very small, ~1.5 bytes/request.
At 10 requests a minute, you're looking at:
1.5 bytes * 10 * 60 minutes * 24 hours = 21600 bytes (21.094 kilobytes) sent in a day, or approximately .61 megabytes per month.
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