Concealing short disconnects

Dan Nelson dnelson at
Sat Feb 12 04:03:28 GMT 2005

In the last episode (Feb 12), Andrew P. said:
> I have a few machines behind my FreeBSD box. The box connects to ISP
> via ppp (PPPoE protocol). It's all working very nicely, but the ISP
> is a pain - it disconnects every 24 hours. I can reconnect in just a
> moment - so the diconnect is usually less than a second long, but
> many applications, like ICQ/MSN and games "feel" the disconnect. The
> matter is that these applications can handle fairly large packet loss
> (e.g. Counter-Strike can cope with at least 15-second long 100%
> packet loss), but AFAIK it's in the nature of the TCP/UDP that a
> disconnect is a disconnect.
> As I know that FreeBSD is full of magic, is there any way to
> conceal these reconnects as short moments of 100% packet loss?
> I am ashamed to know very little about protocols' technicalities,
> but I'll look into any sources you advise.

Check to see if your IP number changes when you reconnect.  If it does,
there's nothing you really can do; the remote system you were talking
to knew you only by your old IP, and those packets coming to them from
this other IP are unrelated.

	Dan Nelson
	dnelson at

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