Re: Question about /etc/resolvd.conf and local resolver

2022-03-27 Thread Peter J. Philipp
Hello J Doe/general, Some comments inline... On Sat, Mar 26, 2022 at 09:58:01PM -0400, J Doe wrote: > Hi, > > I had a question regarding configuring: /etc/resolvd.conf for use with a > local caching resolver (using BIND), on the loopback address on OpenBSD 7.0. > > This server is a mail server

Re: Question about /etc/resolvd.conf and local resolver

2022-03-27 Thread Stuart Henderson
On 2022-03-27, Peter J. Philipp wrote: > Some fun facts about DNS. A DNS packet can be 0x hex (or 65535 bytes dec) > maximally. This is true for TCP DNS packets which serve an unsigned short > indicator of length before the packet segment. With UDP it's a bit different > a UDP packet can be

Re: tcpdump - ifname in filter expression

2022-03-27 Thread David Gwynne
On Wed, Mar 23, 2022 at 02:34:54PM -0400, Aner Perez wrote: > On 3/22/22 00:37, David Gwynne wrote: > > On Mon, Mar 21, 2022 at 04:37:59PM -0400, Aner Perez wrote: > > > I noticed that if I put an "ifname" (or "on") in a fllter expression for > > > tcpdump, it will show all traffic that has an ifna