On Sat, 21 Feb 2004, Geo. wrote:
traceroute to 248.245.255.191, that's what made me think it was invalid.
It has nothing to do with the x.y.255.z -- the 240.0.0.0/4 is IANA reserved space. If you had given the whole IP in the first place you could have saved yourself some abuse. :-) You are right in the sense that it has been recommended for a while that ISP's filter invalid traffic outbound from their network, to prevent their customers from spoofing. However, given the number of incidents of hijacking recently, it's entirely possible whoever is using this actually has their own BGP feed. [westnet]:~$ whois 248.245.255.191 BW whois 3.4 by Bill Weinman (http://whois.bw.org/) Copyright 1999-2003 William E. Weinman Request: 248.245.255.191 from whois.arin.net:43 [cached Sat Feb 21 16:18:16 2004 UTC] OrgName: Internet Assigned Numbers Authority OrgID: IANA Address: 4676 Admiralty Way, Suite 330 City: Marina del Rey StateProv: CA PostalCode: 90292-6695 Country: US NetRange: 240.0.0.0 - 255.255.255.255 CIDR: 240.0.0.0/4 NetName: RESERVED-240 NetHandle: NET-240-0-0-0-0 Parent: NetType: IANA Special Use Comment: Please see RFC 3330 for additional information. RegDate: Updated: 2002-10-14 OrgAbuseHandle: IANA-IP-ARIN OrgAbuseName: Internet Corporation for Assigned Names and Number OrgAbusePhone: +1-310-301-5820 OrgAbuseEmail: abuse@iana.org OrgTechHandle: IANA-IP-ARIN OrgTechName: Internet Corporation for Assigned Names and Number OrgTechPhone: +1-310-301-5820 OrgTechEmail: abuse@iana.org # ARIN WHOIS database, last updated 2004-02-20 19:15 # Enter ? for additional hints on searching ARIN's WHOIS database. ========================================================== Chris Candreva -- chris@westnet.com -- (914) 967-7816 WestNet Internet Services of Westchester http://www.westnet.com/