<div dir="ltr"><div dir="ltr"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><a href="https://archive.nanog.org/meetings/nanog40/presentations/BGPcommunities.pdf" rel="noreferrer" target="_blank">https://archive.nanog.org/meetings/nanog40/presentations/BGPcommunities.pdf</a><br></blockquote><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Don’t let anyone send you Informational tags, these
should only be set by you, and you should strip them
from all BGP neighbors (customers, transits, peers, etc). Otherwise you have a massive security problem.  </blockquote><div><br></div><div>I often see informational tags propagated through multiple ASes. What is the security risk there?</div></div></div>