On Thu, Aug 16, 2012 at 08:27:27PM -0700, John R Pierce wrote: > On 08/16/12 7:01 PM, fred smith wrote: > > I'm getting a gazillion of these probes in my firewall logs. I don't > > understand what's going on here,... These all look like bootp requests > > from 10.21.72.1, to 255.255.255.255. > > > > there's certainly no 10.x.x.x here on this network, and I don't get the > > destination address... is it possible to send packets out onto the > > internet addressed like that? > > > > whois doesn't turn up anything on 10.21.72.1. > > > > Anybody got suggestions on how I'd track this down? > > > > Thanks! > > > > > > Aug 16 21:13:59 kernel: DROP <4>DROPIN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:23:eb:77:71:d9:08:00 <1>SRC=10.21.72.1 DST=255.255.255.255 <1>LEN=328 TOS=0x00 PREC=0x00 TTL=255 ID=34040 PROTO=UDP <1>SPT=67 DPT=68 LEN=308 > > Aug 16 21:14:45 kernel: DROP <4>DROPIN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:23:eb:77:71:d9:08:00 <1>SRC=10.21.72.1 DST=255.255.255.255 <1>LEN=328 TOS=0x00 PREC=0x00 TTL=255 ID=34063 PROTO=UDP <1>SPT=67 DPT=68 LEN=308 > > Aug 16 21:15:08 kernel: DROP <4>DROPIN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:00:23:eb:77:71:d9:08:00 <1>SRC=10.21.72.1 DST=255.255.255.255 <1>LEN=328 TOS=0x00 PREC=0x00 TTL=255 ID=34075 PROTO=UDP <1>SPT=67 DPT=68 LEN=308 > > .... > > that looks like DHCP requests. maybe there's some piece of network gear > on your gateway LAN thats trying to get autoconfigured?. John, I'm willing to believe that, but I don't know where it would be coming from... not to mention that 10.x.x.x isn't valid on my LAN, it's in the 192.168.x.x range. I guess I could go around disconnecting things and see where it's coming from. other than some PCs, there is a networked printer, a LaCie RAID-1 network storage box, and a Television, which is allegedly turned off (but as we all know you don't turn them off, really, at least some part is still "on"). last time I looked at the TV config it was properly configured in 192.168.x.x, but perhaps I should go downstairs and take another look. ... no, it's not the tv, I just unplugged its cat5 from the jack and the issue didn't stop. weird. hmm... just did traceroute 10.21.72.1 and it comes back as being a system at my ISP. that doesn't seem right to me. they shouldn't be broadcaasting such stuff, as far as I know, at least. Any other thoughts? > > > > > > > -- > john r pierce N 37, W 122 > santa cruz ca mid-left coast > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos -- ------------------------------------------------------------------------------- Under no circumstances will I ever purchase anything offered to me as the result of an unsolicited e-mail message. Nor will I forward chain letters, petitions, mass mailings, or virus warnings to large numbers of others. This is my contribution to the survival of the online community. --Roger Ebert, December, 1996 ----------------------------- The Boulder Pledge -----------------------------