我遇到了一个问题，我的 DNS 会定期锁定（大约每天两次）。一切正常，然后突然拒绝访问 net_if
network: error: could not listen on UDP socket: permission denied
当您深入查看消息日志时，自上次重启以来的唯一错误是
Dec 14 13:50:17 r2d2 kernel: in6_ifadd: 2001:19f0:7000:8945:5400:ff:fe05:3dab is already configured
Dec 14 13:59:26 r2d2 kernel: in6_ifadd: 2001:19f0:7000:8945:5400:ff:fe05:3dab is already configured
如果我重新启动网络
service netif restart
网络完全失败，我尝试多次后最终重新启动，然后一切恢复正常，大约两三个小时后，又是同样的事情。
我的 rc.conf
# service -l|grep net
inetd
netif
netoptions
netwait
[\u@r2d2:/root] # cat /etc/rc.conf
hostname="r2d2.ex-mailer.com"
#ifconfig_vtnet0="dhcp"
sshd_enable="YES"
static_routes=linklocal
route_linklocal="-net 169.254.0.0/16 -interface vtnet0"
crypto_load=YES
cryptodev_load=YES
aesni_load=YES
gateway_enable="yes"
#ifconfig_vtnet0_ipv6="inet6 2001:19f0:7000:8945:5400:00ff:fe05:3dab prefixlen 64"
ifconfig_vtnet0_alias0="inet6 2001:19f0:7000:8945:5400:0001:0001:0002 prefixlen 64"
ifconfig_vtnet0_alias0="inet6 2001:19f0:7000:8945::64 prefixlen 64"
rtsold_enable="YES"
rtsold_flags="-aF"
apache24_enable="YES"
named_enable="YES"
mysql_enable="YES"
dovecot_enable="YES"
sendmail_enable="NO"
sendmail_submit_enable="NO"
sendmail_outbound_enable="NO"
sendmail_msp_queue_enable="NO"
postfix_enable="YES"
apache24_enable="YES"
saslauthd_enable="YES"
spamd_enable="YES"
clamav_freshclam_enable="YES"
clamav_clamd_enable="YES"
maiad_enable="YES"
mailman_enable="YES"
milteropendkim_enable="YES"
milteropendkim_uid="opendkim"
mailgraph_enable="YES"
swapfile="/usr/swap0"
pf_enable="NO"
pf_rules="/home/pf.conf"
pflog_enable="YES"
pflog_logfile="/var/log/pflog"
firewall_enable="NO"
firewall_type="open"
这是在前几天进行全面系统更新后发生的。
我还可以在哪里开始调试这个问题或寻找解决方案？