On Thu, 08 Nov 2012 12:15:55 -0500, Neal Murphy wrote: > On Thursday, November 08, 2012 11:58:33 AM Darac Marjal wrote: >> On Thu, Nov 08, 2012 at 03:26:23PM +0000, Hendrik Boom wrote: >> > I've started getting messages like the following: >> > >> > [12332.047451] IN=ppp0 OUT=ppp0 SRC=74.125.133.188 DST=25.46.128.71 >> > LEN=40 TOS=0x00 PREC=0x00 TTL=50 ID=46353 PROTO=TCP SPT=5228 >> > DPT=44380 WINDOW=0 RES=0x00 RST URGP=0 [111179.489288] IN=ppp0 >> > OUT=ppp0 SRC=74.125.133.188 DST=25.45.89.15 LEN=40 TOS=0x00 PREC=0x00 >> > TTL=50 ID=25315 PROTO=TCP SPT=5228 DPT=43491 WINDOW=0 RES=0x00 RST >> > URGP=0 >> > >> > Now these IP numbers are not on my LAN, which is masqueraded. They >> > also bear no relationship to my external-world IP number. If it's >> > about a packet being sent from 4.125.133.188 to either of the others, >> > my ISP shouldn't even be sending it to me. Do I understand the >> > message correctly? >> >> Yep. As I understand it 74.125.133.188:5228 is sending a RESET packet >> to 25.46.128.71:44380. By the looks of things, though, your kernel is >> responding as you'd expect it to and re-routing the packet back out >> your PPP connection (that is, it came in on ppp0, it's not for you, so >> you pass it back out on the default route which I imagine is ppp0). > > Presented this way, it could be a DDoS attack on either the src or the > dest.
That's plausible. There's probably no real reason for assuming that the SRC address is where the packet originated. Two more of htem arrived today, with a new SRC, 74.125.142.138 (different but similar to yesterday's), but different destinations, 25.46 37.163 and 25.44.254.232. -- hendrik -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/k7jmi3$6lp$1...@ger.gmane.org
