[Dshield] DHCP/PPP (was Sobig IP list site.)

Porter, Richard USA rwporter at nps.navy.mil
Sat Aug 23 02:47:27 GMT 2003


.... My netgear gets a new IP address (over PPPoE) around 2 day mark. Some ISPs (SBC in particular) force a renew. 
 
Rich

	-----Original Message----- 
	From: Josh Tolley [mailto:josh at raintreeinc.com] 
	Sent: Fri 8/22/2003 4:14 PM 
	To: 'General DShield Discussion List' 
	Cc: 
	Subject: RE: [Dshield] DHCP/PPP (was Sobig IP list site.)
	
	

	...or if the connection is never cut on a DHCP network, there's never a need
	to issue a new IP. My home netgear router has been on for... well... quite a
	while anyway without cutting the connection, so I expect it's had the same
	address the whole time.
	
	Josh
	
	> On Fri, 2003-08-22 at 14:25, Richard Roy wrote:
	> > Am I off base here?  I guess I don't follow the logic of
	> targeting an
	> > attack to happen after the worm reaches an estimated peak,
	> using dial
	> > ups that may or may not be there aside from the fact that
	> the IP might
	> > be there but in a dial up pool it might not be the same computer.
	>
	> ISPs can assign PPPoE users a static IP address based on the
	> login. I'm
	> sure regular dialup PPP could provide the same service: you dial a
	> special number and log in and get the same IP address every time.
	>
	> DHCP (DSL or cable) can be configured to assign the same IP
	> address to a
	> given MAC address. If your MAC address changes, you get a different IP
	> address. I've dealt with DSL providers in Canada that do
	> this. ("Static
	> IP address", hah!)
	>
	> --
	> John Hardin  KA7OHZ                          
	> Internal Systems Administrator                    voice:
	> (425) 672-1304
	> Apropos Retail Management Systems, Inc.             fax:
	> (425) 672-0192
	> --------------------------------------------------------------
	
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