D Hill wrote: > On Fri, 28 Mar 2008 at 13:40 +0100, [EMAIL PROTECTED] confabulated: > > >> Hi, >> >> >>> Hi my servers are getting spam from the ip's below (rbl's are not >>> catching them) how can I block the whole ip ranges that these ip's >>> belong to ? How do I figure out the netmask / Mask Bits .. All the >>> calculators I have found so far only work for class A,B and C networks .. >>> >> you can use simply "whois" >> >> #whois 67.205.81.186 >> >> returns: >> >> Groupe iWeb Technologies inc. IWEBGROUP (NET-67-205-64-0-1) >> 67.205.64.0 - 67.205.95.255 >> K T Tran BODHOST-COM-CL-T039-480CN (NET-67-205-81-184-1) >> 67.205.81.184 - 67.205.81.191 >> >> # ARIN WHOIS database, last updated 2008-03-27 19:10 >> # Enter ? for additional hints on searching ARIN's WHOIS database. >> >> so use a calculator to find that it's 67.205.81.184/29 >> > > You can also find that out without a calculator by looking at the net > name: > > %whois -a NET-67-205-81-184-1 > ... > NetRange: 67.205.81.184 - 67.205.81.191 > CIDR: 67.205.81.184/29 > ... > > -d > > Thanks for the leads will do as advised ..
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