FW: The worst abuse e-mail ever, sverige.net
Steven Champeon
schampeo at hesketh.com
Tue Sep 21 18:49:07 UTC 2004
on Tue, Sep 21, 2004 at 02:11:11PM -0400, Daniel Senie wrote:
<snip good info>
> 2) for dialup, DSL and Cable users on dynamic ports who should not
> generally be running servers, name the INADDR with something like:
>
> w-x-y-z.dialup.example.net
> w-x-y-z.dynamic.example.net
>
> or similar. I don't care what scheme you want to use to the LEFT of
> 'dialup.example.com' or 'dynamic.example.com' but please put the
> information about these being dynamic blocks in a place where they can be
> filtered using simple mechanisms (i.e. without regex overheads).
>
> With the naming above, it's easy to filter out dialup.example.com in the
> access lists of mail servers without any worries. Users coming in from
> those addresses using authenticated connections to the submission port will
> work fine, while spam direct from those machines will not work.
>
> Many ISPs do this quite well. While it's still some work for the receiving
> systems vs. port 25 filtering, it sure beats guessing about remote
> topologies.
FYI - I've been tracking rDNS naming conventions for many ISPs for the
past year and a half. (Basically, if your network is secure, I don't
know about you - I only track rDNS for hosts that relay spam or spew
viruses at me). Of the approximately 4800 networks (by domain) I've
tracked, 1935 are known to be in the US, Mexico, or Canada. Of those,
509 have some form of RHS-friendly rDNS. Roughly 26%. Better than last
year, but still pretty bad.
cgocable.ca cabletv.on.ca aci.on.ca eastlink.ca
powergate.ca primus.ca sympatico.ca ubc.ca
uoguelph.ca uniserve.ca utoronto.ca videotron.ca
netidea.bc.ca ulaval.ca ualberta.ca dal.ca
uottawa.ca uwo.ca connection.ca terago.ca
accesscomm.ca ucc-net.ca sfu.ca yorku.ca
ncf.ca rushcomm.ca eol.ca mcgill.ca
oricom.ca vdn.ca amdsb.ca umontreal.ca
cyberus.ca knet.ca magma.ca mcmaster.ca
usherbrooke.ca cgi.ca unb.ca sprintdsl.ca
aol.com aracnet.com atlantabroadband.com attbi.com
insightbb.com mchsi.com bbtel.com ccapcable.com
cerfnet.com charter.com dancris.com execulink.com
mindspring.com nexband.com rcn.com redshift.com
ripnet.com rogers.com rr.com theplanet.com
wideopenwest.com xmission.com cablenet-va.com charter-ala.com
cox-internet.com quik.com gvtc.com bah.com
lan2wan.com westelcom.com power1.com mdsg-pacwest.com
eschelon.com gvtel.com nettally.com octapus.com
firstlink.com hbci.com iinet.com naxs.com
ntplx.com tfb.com srtnet.com theriver.com
vcn.com visi.com webhostplus.com winbeam.com
gtlakes.com varian.com royaume.com primarydns.com
netdoor.com registeredsite.com bearingpoint.com core.com
tvc-ip.com teksavvy.com opt2opt.com quiknet.com
srt.com pcspeed.com cadvision.com mynethost.com
800hosting.com scrtc.com speede.com warpdriveonline.com
wavecable.com lightyearcom.com midmaine.com prairieweb.com
c2bandwidth.com innercite.com cintelecom.com hyperusa.com
seanet.com cwia.com mcttelecom.com osp-chicago.com
primenet.com fire2wire.com calltech.com anobi.com
telus.com hyatthsiagx.com spiritone.com aesirnetworks.com
foxinternet.com willscot.com acetechusa.com aeanetwork.com
alabanza.com arishost.com calpop.com computechnv.com
datapeer.com fatcow.com iwaynetworks.com linuxwebnet.com
mobilenetics.com skybitz.com tir.com unitedcolo.com
zedcom.com zoolink.com crestviewcable.com mipops.com
neteze.com wilnet1.com conninc.com asu.edu
berkeley.edu brown.edu bucknell.edu cmich.edu
cmu.edu colorado.edu columbia.edu cornell.edu
csulb.edu csuohio.edu dartmouth.edu duke.edu
ecu.edu fsu.edu furman.edu gac.edu
gatech.edu harvard.edu hawaii.edu indiana.edu
msu.edu ncsu.edu nodak.edu pepperdine.edu
psu.edu purdue.edu rit.edu siu.edu
swt.edu tamu.edu ttu.edu ua.edu
ucla.edu ucsd.edu uga.edu uh.edu
uidaho.edu uiowa.edu uiuc.edu umass.edu
umd.edu umich.edu unc.edu unt.edu
upenn.edu uri.edu usf.edu utexas.edu
utk.edu utoledo.edu uwec.edu vt.edu
wsu.edu wwu.edu drexel.edu brockport.edu
macalester.edu ou.edu arizona.edu mnscu.edu
wustl.edu ilstu.edu uci.edu clarkson.edu
missouri.edu ncat.edu usc.edu uky.edu
yale.edu ufl.edu vanderbilt.edu clemson.edu
du.edu kent.edu trinity.edu upr.edu
csuchico.edu depaul.edu bloomu.edu cmsu.edu
msoe.edu neu.edu utah.edu uaf.edu
alaska.edu trincoll.edu marshall.edu pitt.edu
northwestern.edu temple.edu maine.edu albany.edu
uno.edu virginia.edu cwru.edu emich.edu
tcu.edu buffalo.edu byu.edu uconn.edu
rpslmc.edu emory.edu vcu.edu unco.edu
cabrini.edu wm.edu pdx.edu carleton.edu
jhu.edu mtu.edu utc.edu ualr.edu
colostate.edu washington.edu uwp.edu nyu.edu
gsu.edu smu.edu wisc.edu wilkes.edu
roch.edu uchicago.edu iupui.edu okstate.edu
cablered.com.mx podernet.com.mx avantel.net.mx infosel.net.mx
alestra.net.mx 1st.net 21stcentury.net acsalaska.net
adelphia.net airmail.net algx.net allstream.net
alltel.net ameritech.net att.net attwireless.net
bellatlantic.net bresnan.net bright.net btitelecom.net
centurytel.net cgocable.net chartertn.net comcast.net
comporium.net cnc.net coretel.net covad.net
cox.net cypresscom.net dsl.net earthlink.net
eatel.net enter.net frontiernet.net genuity.net
globetrotter.net graceba.net grandecom.net grouptelecom.net
gtei.net gte.net igs.net ij.net
infoave.net iowatelecom.net level3.net madisonriver.net
mcleodusa.net mnsi.net mountaincable.net mts.net
navix.net netins.net networktel.net nextweb.net
ntelos.net nvbell.net one.net optonline.net
pacbell.net personainc.net ptd.net prserv.net
quickclic.net qwest.net ricochet.net rmci.net
shawcable.net sigecom.net snet.net speakeasy.net
starband.net surewest.net swbell.net tds.net
telus.net telusplanet.net tht.net twtelecom.net
uslec.net uswest.net uu.net verizon.net
voyager.net warwick.net xo.net e-nt.net
k-state.net sprint-canada.net sprint-hsd.net terranova.net
nauticom.net socket.net ziplink.net epix.net
kci.net kmcmail.net abac.net earthnet.net
gwtc.net ctsmail.net accessus.net aloha.net
beld.net above.net stargate.net redwing.net
chilitech.net uswo.net logical.net golden.net
win.net verio.net tachyon.net chartermi.net
sherbtel.net charterpipeline.net mercury.net lmi.net
concentric.net airstreamcomm.net alerondial.net arrival.net
atlantech.net atlantic.net bluegrass.net charlevoix.net
corecomm.net evertek.net frii.net garlic.net
hargray.net hicv.net inter.net intermonde.net
internorth.net iquest.net mwt.net prairieinet.net
rcnetworks.net restel.net wcom.net velocitus.net
wt.net vnet.net brightok.net spacestar.net
digitalpath.net hexcom.net shentel.net qx.net
comcastbusiness.net volcano.net qis.net fcc.net
dandy.net interdial.net psi.net lan2wan.net
pacificcoast.net impulse.net incentre.net forethought.net
sover.net itlnet.net grandenetworks.net llix.net
openband.net tns.net dsl-only.net metalink.net
mich.net dasia.net hereintown.net cwis.net
sunset.net thebiz.net donobi.net mw.net
nac.net speedfactory.net sbcglobal.net texas.net
alliancecom.net westpa.net uiowa.net rrv.net
bway.net axs2000.net centennialpr.net cfu.net
kansas.net anc.net acceleration.net ao.net
aoltw.net alter.net cari.net eli.net
sfl.net dti.net santel.net exatt.net
swva.net fastfreedom.net mzima.net rnetinc.net
hiwaay.net imaginenet.net cloud9.net ncia.net
infocrossing.net inreach.net lincon.net mags.net
mfnx.net mcisi.net sagonet.net servint.net
sitestream.net worldspice.net shreve.net xtelegent.net
island.net means.net relia.net hickorytech.net
brtc.net luhs.org pmt.org wbdl.org
carrollton.al.us
NOTE: not everyone listed here uses RHS-friendly rDNS consistently, these
are just the folks we've managed to discover are using it at all.
<snip even more good info>
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