Finding blocked packages repositories from iptables logs, then creating a manageable list for to distribute to other hosts.

iptables_yum.md

[dspencer@poseidon ~]$ cat /tmp/iptables_yum.txt | awk '{ print $10}' |\
  sed 's/DST=//' | xargs -n1 host | awk '{ print $5 }' | grep -v NXDOMAIN | sort -u

ajax.vcu.edu.
archive.linux.duke.edu.
boa.wallawalla.edu.
cork.umd.edu.
deepthought.gtlib.gatech.edu.
dl01.fedoraproject.org.
dl04.fedoraproject.org.
fedora.mirrors.pair.com.
hilbert.unl.edu.
kdeforge2.unl.edu.
linux.mirrors.es.net.
linux00ss.unity.ncsu.edu.
lug.mtu.edu.
mirror.chpc.utah.edu.
mirror.cogentco.com.
mirror.cs.pitt.edu.
mirror.cs.ucalgary.ca.
mirror.lstn.net.
mirror.math.Princeton.EDU.
mirror.metrocast.net.
mirror.oss.ou.edu.
mirror.sfo12.us.leaseweb.net.
mirror.steadfast.net.
mirror.symnds.com.
mirror.us.leaseweb.net.
mirror.westmancom.com.
mirror01.prgmr.com.
mirrors.cat.pdx.edu.
mirrors.mit.edu.
mirrors.syringanetworks.net.
mirrors.tummy.com.
mirrors.xmission.com.
muug.ca.
reflector.westga.edu.
smoke.rc.rit.edu.
tiz-korg-mirror.kernel.org.