If you have a DirecTV DVR and are tired of the ads during pause here is what I found to block to stop the ads. I use the great OPNsense, but any firewall will do.
xandrssads-sponsored.akamaized.net
insights-collector.newrelic.com
yospace.directv.com.edgesuite.net
xaaf-be-live.att.com
itv-pxy.dtvce.com
ad.doubleclick.net
5af10.v.fwmrm.net
1f2e7.v.fwmrm.net
dtvstb-screensaver.secure.footprint.net
iw.dtvce.com