On 7/29/23, Andrew Schulman via Cygwin <cygwin@cygwin.com> wrote: >> Sorry... Did you try using the -d option to see what DNS servers these >> commands try to actually connect to (and time out, eventually). > > No help unfortunately. > > $ host -d6 cygwin.com > Trying "cygwin.com" > ;; connection timed out; no servers could be reached
Have you tried the windows version of bind from isc.org? I don't remember when ISC dropped (will drop?) support for windows, but I've been using dig from the bind9.16.41 package for a while. Not that I use it all that much, but it works for me.. or at least dig does. named on windows has something funky going on that I never figured out, so I'm running named on Debian. Get it here https://ftp.isc.org/isc/bind9/9.16.41/BIND9.16.41.x64.zip unzip and put that directory in your path $ which dig /cygdrive/c/Temp/BIND/dig and have fun! $ dig @2600:x:x:x::x:x www.google.com aaaa +short 2607:f8b0:4004:c09::67 2607:f8b0:4004:c09::69 2607:f8b0:4004:c09::93 2607:f8b0:4004:c09::63 Lee@i3668 ~ $ dig @2600:x:x:x::x:x www.google.com a +short 172.253.122.147 172.253.122.103 172.253.122.99 172.253.122.104 172.253.122.105 172.253.122.106 ipv6 address hidden to protect the guilty :) ... hrmmm ... I just tried your "host -d6 cygwin.com" and got $ host -d6 cygwin.com Trying "cygwin.com" ;; connection timed out; no servers could be reached Do you have a firewall blocking outbound udp/tcp to port 53? I do, which is most probably why I get the timeout. But this works: $ host cygwin.com 2600:x:x:x::x:x Using domain server: Name: 2600:x:x:202::x:x Address: 2600:x:x:202::x:x#53 Aliases: cygwin.com has address 8.43.85.97 cygwin.com mail is handled by 10 sourceware.org. Maybe try using whatever dig you already have installed and do ipconfig /all | grep "DNS Server" and then dig @<my dns server address> cygwin.com Regards, Lee > >> (strace can help as well, I think.) > > Posted at https://pastebin.com/XWwxJ41b. I'm not able to make much sense of > it, > except that on line 1339, I waited almost 5 seconds for sendmsg: > > 4964291 6958349 [isc-worker0000] host 20999 cygwin_sendmsg: 28 = > sendmsg(20, > 0x7FFDFC830, 0x0) > > Thanks for taking a look. I'm looking at other options in resolv.conf, but > haven't found anything useful. > > I can't find any documention of the osquery option. This answer[1] says > "res_init() uses the Windows resolver if either /etc/resolv.conf does not > exist, > or /etc/resolv.conf contains options osquery." Doesn't help in this case > though. > > Andrew > > [1] > https://stackoverflow.com/questions/10523828/how-does-gcc-cygwin-get-the-dns-server > > > -- > Problem reports: https://cygwin.com/problems.html > FAQ: https://cygwin.com/faq/ > Documentation: https://cygwin.com/docs.html > Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple > -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
