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Today I was reminded again that the #2 cause for network problems (still long after the evergreen #1 DNS) is contentious between BGP and PMTU discovery / MTU black holes. @rene_mobile/1545670612038860800On twitter.com
♻️ 2 Retweets ❤️ 7 Favorites Mood -2 🙁
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(And yes, of course, your truly was the issue for my week-long network issues head-scratching - on two separate hops of the network path, although on different layers.)Permalink On twitter.com
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But I also learned that @WireGuardVPN is excellent in handling MTU issues. Set the wireguard network device MTU to 1600 to allow "interesting" protocols tunneled within and it will just do the right thing with either IPv4 or v6. What a nice change from IPsec MTU handling...Permalink On twitter.com