[arm-allstar] Losing connections

David McGough kb4fxc at inttek.net
Thu Nov 14 15:27:45 EST 2019 

Hi Tom,

Those "SERVFAIL unexpected RCODE" message mean the that DNS server can't 
connect outbound to the root servers (such as: 192.5.5.241, 193.0.14.129, 
198.41.0.4, etc.). So, DNS won't work, because it's blocked.

Take a look at the top lines of the file: /etc/named.conf ....There should 
be a line that says:

    forwarders { 8.8.8.8; 8.8.4.4; };


Here is what the top of the "stock" file looks like:


///////////////////////////////////////////////////////////////////////////

// vim:set ts=4 sw=4 et:

options {
    directory "/var/named";
    pid-file "/run/named/named.pid";

    // Uncomment these to enable IPv6 connections support
    // IPv4 will still work:
    //  listen-on-v6 { any; };
    // Add this for no IPv4:
    //  listen-on { none; };

    allow-recursion { 127.0.0.1; };
    allow-transfer { none; };
    allow-update { none; };

    forwarders { 8.8.8.8; 8.8.4.4; };
    dnssec-enable no;
    dnssec-validation no;
    dnssec-lookaside no;

///////////////////////////////////////////////////////////////////////////

....Does your /etc/named.conf file look like this? If not, try adding the 
"forwarders" statement.


73, David KB4FXC



On Thu, 14 Nov 2019, "Tom Eaton via ARM-allstar" wrote:

> My node keeps dropping connections and this is what I find in logs when
> connection drops. As you can see the times for both logs are the same.
> 
> Thanks
> Tom KC4CBQ
> 
> AST log
> 
> [Nov 14 08:00:28] WARNING[362] chan_iax2.c: Max retries exceeded to
> host 100.14.59.105 on IAX2/100.14.59.105:4569-3286 (type = 7, subclass
> = 0, ts=35145816, seqno=157)
> [Nov 14 08:00:30] WARNING[4812] app_rpt_generic.c: Reported node 48355
> cannot be found!!
> 
> 
> Linux log
> 
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:30 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:35 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:36 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.203.230.10#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.91.13#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.41.0.4#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 198.97.190.53#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.36.148.17#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.58.128.30#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 199.7.83.42#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.5.5.241#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.33.4.12#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.228.79.201#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 193.0.14.129#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 202.12.27.33#53
> Nov 14 08:00:37 KC4CBQ named[298]: SERVFAIL unexpected RCODE resolving
> '48355.asl.hamvoip.org/TXT/IN': 192.112.36.4#53
> Nov 14 08:01:01 KC4CBQ CROND[4861]: (root) CMD (run-parts /etc/cron.hourly)
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