Many thanks for your quick response Justin. More interleaved below.
Kind regards, Bruce [1] https://www.whatsmydns.net <https://www.whatsmydns.net/> [2] https://shorewall.org/XenMyWay-Routed.html <https://shorewall.org/XenMyWay-Routed.html> > On 29 Feb 2020, at 11:00, Justin Pryzby <pry...@telsasoft.com> wrote: > > On Sat, Feb 29, 2020 at 10:27:24AM +1100, Bruce Bannerman wrote: >> I have noticed problems with my nameserver not sustaining the propagation of >> my DNS records. > > I don't know what you mean by that ? I have been using whatsmydns [1] to monitor my zone changes being picked up by servers at different places arount the world. I can see that after a time that the new definitions are dropped and not refreshed after my TTL settings time out. > >> On investigation, I have found a number of intermittent incorrect cksum >> messages when using tcpdump. > > To my knowledge, that's due to TCO feature, which you can disable to see if > it's misbehaving. > >> Does anyone have a pointer on how to address this issue? > > https://sokratisg.net/2012/04/01/udp-tcp-checksum-errors-from-tcpdump-nic-hardware-offloading/ > And many other search results with more info I’ll check these out. I also reread Tom’s Routed Xen my way and saw his note on 'post-up ethtool -K eth0 tx off’ > > -- > Justin > > > _______________________________________________ > Shorewall-users mailing list > Shorewall-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/shorewall-users
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