The issue of the ConnectToServer in the log files coninue in the log, with any device to connect to de Wlan and Lan.
Model Name: DIR-2660   Hardware Version: A1   Firmware Version: 1.04            ISP: Pepephone/Movistar
and the log file:
2020-04-26 06:18:03 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
2020-04-26 06:18:04 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-04-26 06:18:05 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 3
2020-04-26 06:18:06 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-04-26 06:18:06 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef
2020-04-26 06:18:54 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-04-26 06:18:54 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef
2020-04-26 06:18:57 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
2020-04-26 06:18:57 syslog: server6_recv: received solicit from fe80::42b0:34ff:fe80:46bd
2020-04-26 06:18:57 syslog: dhcp6_get_options: get DHCP option elapsed time, len 2
2020-04-26 06:18:57 syslog:   elapsed time: 65535
2020-04-26 06:18:57 syslog: dhcp6_get_options: get DHCP option client ID, len 10
2020-04-26 06:18:57 syslog:   DUID: 00:03:00:01:40:b0:34:80:46:be
2020-04-26 06:18:57 syslog: dhcp6_get_options: get DHCP option identity association, len 12
2020-04-26 06:18:57 syslog:   IA_NA: ID=3, T1=0, T2=0
2020-04-26 06:18:57 syslog: dhcp6_get_options: get DHCP option option request, len 12
2020-04-26 06:18:57 syslog:   requested option: status code
2020-04-26 06:18:57 syslog:   requested option: server unicast
2020-04-26 06:18:57 syslog:   requested option: DNS
2020-04-26 06:18:57 syslog:   requested option: domain search list
2020-04-26 06:18:57 syslog:   requested option: client FQDN
2020-04-26 06:18:57 syslog:   requested option: preference
2020-04-26 06:18:57 syslog: dhcp6_get_options: get DHCP option client FQDN, len 8
2020-04-26 06:18:57 syslog: react_solicit: client ID 00:03:00:01:40:b0:34:80:46:be
2020-04-26 06:18:57 syslog: make_iana_from_pool: called
2020-04-26 06:18:57 syslog: get_free_address_from_pool: called (pool=dhcpv6pool)
2020-04-26 06:18:57 syslog: get_free_address_from_pool: no available address
2020-04-26 06:18:57 syslog: copy_option: set server ID (len 10)
2020-04-26 06:18:57 syslog: copy_option: set status code (len 2)
2020-04-26 06:18:57 syslog: server6_send: transmit advertise to fe80::42b0:34ff:fe80:46bd
2020-04-26 06:18:58 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-04-26 06:18:59 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 3
2020-04-26 06:19:00 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-04-26 06:19:00 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef2020-04-26 07:48:48 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-04-26 07:48:49 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 3
2020-04-26 07:48:50 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-04-26 07:48:50 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef
2020-04-26 07:48:53 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
2020-04-26 07:48:54 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-04-26 07:48:55 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 3
2020-04-26 07:48:56 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-04-26 07:48:56 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef
2020-04-26 07:48:59 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
2020-04-26 07:49:00 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-04-26 07:49:01 syslogd exiting
2020-04-26 07:49:01 [SYSLOG]: start BusyBox v1.22.1
2020-04-26 07:49:01 crond[5979]: crond: crond (busybox 1.22.1) started, log level 8
2020-04-26 07:49:02 syslog: dnssd_clientstub ConnectToServer: connect() failed path:/var/run/mdnsd Socket:27 Err:-1 Errno:0 Success
2020-04-26 07:49:02 syslog: dnssd_clientstub DNSServiceRefDeallocate called with NULL DNSServiceRef
2020-04-26 07:49:05 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 1
2020-04-26 07:49:06 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 2
2020-04-26 07:49:07 syslog: dnssd_clientstub ConnectToServer: connect()-> No of tries: 3
             total         used         free       shared      buffers
Mem:        250560       141720       108840            0         7508
-/+ buffers:             134212       116348
Swap:            0            0            0
  PID USER       VSZ STAT COMMAND
    1 admin     1688 S    /sbin/procd
    2 admin        0 SW   [kthreadd]
    3 admin        0 SW   [ksoftirqd/0]
    5 admin        0 SW<  [kworker/0:0H]
    7 admin        0 SW   [migration/0]
    8 admin        0 SW   [rcu_bh]
    9 admin        0 SW   [rcu_sched]
   10 admin        0 SW   [migration/1]
   11 admin        0 SW   [ksoftirqd/1]
   13 admin        0 SW<  [kworker/1:0H]
   14 admin        0 SW   [migration/2]
   15 admin        0 SW   [ksoftirqd/2]
   17 admin        0 SW<  [kworker/2:0H]
   18 admin        0 SW   [migration/3]
   19 admin        0 SW   [ksoftirqd/3]
   21 admin        0 SW<  [kworker/3:0H]
   22 admin        0 SW<  [khelper]
   23 admin        0 SW   [kdevtmpfs]
   24 admin        0 SW<  [netns]
   25 admin        0 SW<  [writeback]
   26 admin        0 SW<  [bioset]
   27 admin        0 SW<  [kblockd]
   28 admin        0 SW   [khubd]
   33 admin        0 SW   [kswapd0]
   34 admin        0 SWN  [ksmd]
   35 admin        0 SW   [fsnotify_mark]
   36 admin        0 SW<  [crypto]
   43 admin        0 SW<  [deferwq]
   44 admin        0 SW   [kworker/u8:1]
  140 admin      928 S    /sbin/askfirst ttyS1 /bin/login
  257 admin     1052 S    /sbin/ubusd
  281 admin     1300 S    /usr/bin/if_monitor
  292 admin     5136 S    /sbin/preinit
  305 admin        0 SWN  [jffs2_gcd_mtd6]
  321 admin     1324 S    /sbin/tw_hotplug
  326 admin        0 SW   [scsi_eh_0]
  327 admin        0 SW   [usb-storage]
  328 admin        0 SW   [scsi_eh_1]
  329 admin        0 SW   [usb-storage]
  341 admin     5692 S    /bin/nvram_daemon
  347 admin        0 SW   [kworker/u8:2]
  374 admin        0 SWN  [jffs2_gcd_mtd8]
  857 admin     4060 S    /sbin/stad 1
  858 admin     4064 S    /sbin/stad 2
  887 admin        0 SW   [ufsd_sda1]
 1055 admin      952 S    nl_server -i br0 -s DIR-2660 -s DIR-26605306 -s DIR-
 1057 admin      940 S    nl_server -i br0 -s DIR-2660 -s DIR-26605306 -s DIR-
 1059 admin     1320 S    mDNSResponder -b -i br0 -f /tmp/mdns_resp.conf -e DI
 1129 admin     4892 S    /bin/lighttpd -f /etc_ro/lighttpd/lighttpd.conf -m /
 1137 admin     7904 S    /etc_ro/lighttpd/www/web/HNAP1/prog.fcgi
 1145 admin     4248 S    /usr/sbin/timer
 1158 admin     7928 S    /etc_ro/lighttpd/www/web/HNAP1/prog.fcgi
 1177 admin     4536 S    /sbin/myinfo.cgi
 1203 admin     5528 S    /sbin/smbd -D -F -s /etc/smb.conf
 1214 admin     5528 S    /sbin/smbd -D -F -s /etc/smb.conf
 1306 admin        0 SW   [RtmpCmdQTask]
 1307 admin        0 SW   [RtmpWscTask]
 1308 admin        0 SW   [HwCtrlTask]
 1309 admin        0 SW   [ser_task]
 1359 admin        0 SW   [RtmpMlmeTask]
 1455 admin        0 SW   [RtmpCmdQTask]
 1456 admin        0 SW   [RtmpWscTask]
 1457 admin        0 SW   [HwCtrlTask]
 1458 admin        0 SW   [ser_task]
 1479 admin        0 SW   [RtmpMlmeTask]
 1539 admin     1472 S    bndstrg2 -i rai0 -i ra0
 1681 admin     4004 S    mosquitto -c /etc/mosquitto/mosquitto.conf -d
 1688 admin     5476 S    sbd
 1692 admin     7200 S    apsond
 1696 admin     7200 S    apsond
 1697 admin     7200 S    apsond
 1698 admin     7200 S    apsond
 1699 admin     7200 S    apsond
 1700 admin     7200 S    apsond
 1701 admin     7200 S    apsond
 1703 admin     4504 S    meshd
 2466 admin        0 SW   [kworker/2:0]
 2841 admin        0 SW   [kworker/3:0]
 2880 admin        0 SW   [kworker/1:2]
 3100 admin      976 S    /sbin/udhcpc -i eth3.20 -p /var/run/udhcpc-wan_wan0.
 3116 admin     2472 S    zebra -u admin -g admin -f /tmp/zebra.conf -d
 3126 admin     2128 S    ripd -u admin -g admin -f /tmp/ripd.conf -d
 3145 admin     1420 S    /sbin/pppoe-relay -S eth3.20 -C br0
 3156 admin     2240 S    /usr/sbin/dhcp6s -c /tmp/dhcp6s.conf -k /tmp/dhcp6sc
 3177 admin     1040 S    /usr/sbin/radvd -m none -C /tmp/radvd.conf -d 5
 3401 admin     1156 S    miniupnpd -f /tmp/miniupnpd/miniupnpd.conf -G
 3413 admin     1276 S    inadyn -f /var/inadyn.conf -P /var/run/inadyn.pid --
 3613 admin        0 Z    [sh]
 3783 admin        0 SW   [kworker/1:0]
 3972 admin     3020 S    /usr/bin/xl2tpd -c /etc/xl2tpd.conf -D
 3986 admin     1276 S    inadyn -f /var/inadyn0.conf -P /var/run/inadyn0.pid
 4036 admin        0 SW   [kworker/2:2]
 4168 admin     1976 S    {_plutorun} /bin/sh /lib/ipsec/_plutorun --debug  --
 4169 admin     1964 S    logger -s -p daemon.error -t ipsec__plutorun
 4170 admin     1984 S    {_plutorun} /bin/sh /lib/ipsec/_plutorun --debug  --
 4171 admin     1980 S    {_plutoload} /bin/sh /lib/ipsec/_plutoload --wait no
 4174 admin     2612 S    /lib/ipsec/pluto --nofork --secretsfile /etc/ipsec.s
 4176 admin     2592 S    {pluto} _pluto_adns -- <idle>
 4178 admin     2604 S N  /lib/ipsec/pluto -- pluto helper  #  0 
 4179 admin     2604 S N  /lib/ipsec/pluto -- pluto helper  #  1 
 4181 admin     2604 S N  /lib/ipsec/pluto -- pluto helper  #  2 
 4484 admin        0 SW   [kworker/3:2]
 4760 admin     1036 S    /usr/sbin/odhcp6c -f -R -p /var/run/udhcpc-wan_wan0.
 4789 admin     4704 S    time_client --action daemon
 4848 admin     1344 S    infocgi
 4866 admin     1984 S    {mydlink_watchdo} /bin/sh /mydlink/mydlink_watchdog.
 4943 admin      988 S    omcproxy -e3 eth3.20 br0 scope=realm
 4976 admin     1436 S    /bin/dnsmasq -C /tmp/dnsmasq.conf -6 /tmp/dnsmasq_dh
 4978 admin     1428 S    /bin/dnsmasq -C /tmp/dnsmasq.conf -6 /tmp/dnsmasq_dh
 5012 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5017 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5018 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5047 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5048 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5049 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5051 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5052 admin     5740 S    /mydlink/da_adaptor -s LD_LIBRARY_PATH=/mydlink/lib 
 5532 admin        0 SW   [kworker/2:1]
 5956 admin     1960 S    syslogd -L -R 192.168.1.24
 5979 admin     1972 S    /usr/sbin/crond -c /tmp/schedule/ -f
 5999 admin     1956 S    sleep 5
 6083 admin     1972 S    sh -c arping -I br0 192.168.1.55 -c 1 > /var/arping_
 6084 admin     1968 S    arping -I br0 192.168.1.55 -c 1
 6089 admin     1972 S    sh -c ps >> /etc_ro/lighttpd/www/web/messages
 6090 admin     1964 R    ps
17463 admin        0 SW   [kworker/0:1]
30415 admin        0 SW   [kworker/3:1]
32245 admin        0 SW   [kworker/0:2]
br0       Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:06  
          inet addr:192.168.1.1  Bcast:192.168.1.63  Mask:255.255.255.192
          inet6 addr: fe80::f68c:ebff:fecc:5306/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:14277411 errors:0 dropped:39 overruns:0 frame:0
          TX packets:27550854 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:6036247574 (5.6 GiB)  TX bytes:34433402883 (32.0 GiB)
br1       Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:0A  
          inet6 addr: fe80::a4ea:2aff:fe61:73f9/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:188 (188.0 B)
br2       Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:0B  
          inet6 addr: fe80::c4b1:c6ff:fef9:bcf/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:188 (188.0 B)
br3       Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:0C  
          inet6 addr: fe80::947a:6eff:fe47:28c0/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:188 (188.0 B)
eth2      Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:06  
          inet6 addr: fe80::f68c:ebff:fecc:5306/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5566927 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14852857 errors:0 dropped:148 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1934746296 (1.8 GiB)  TX bytes:2461071431 (2.2 GiB)
          Interrupt:3 
eth2.1    Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:06  
          inet6 addr: fe80::f68c:ebff:fecc:5306/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:262413 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:52947833 (50.4 MiB)
eth2.2    Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:06  
          inet6 addr: fe80::f68c:ebff:fecc:5306/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3307676 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11691569 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:287990629 (274.6 MiB)  TX bytes:16977694140 (15.8 GiB)
eth2.3    Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:06  
          inet6 addr: fe80::f68c:ebff:fecc:5306/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:262413 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:52947833 (50.4 MiB)
eth2.4    Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:06  
          inet6 addr: fe80::f68c:ebff:fecc:5306/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2259251 errors:0 dropped:171 overruns:0 frame:0
          TX packets:2636602 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1546550981 (1.4 GiB)  TX bytes:2498161840 (2.3 GiB)
eth3      Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:09  
          inet6 addr: fe80::f68c:ebff:fecc:5309/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:27694674 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13826518 errors:0 dropped:40 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:668847493 (637.8 MiB)  TX bytes:1890621040 (1.7 GiB)
eth3.20   Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:09  
          inet addr:100.102.38.199  Bcast:100.102.255.255  Mask:255.255.0.0
          inet6 addr: fe80::f68c:ebff:fecc:5309/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:27694654 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13826553 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:34530080086 (32.1 GiB)  TX bytes:6130284406 (5.7 GiB)
imq0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          UP RUNNING NOARP  MTU:16000  Metric:1
          RX packets:27426632 errors:0 dropped:0 overruns:0 frame:0
          TX packets:27486858 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:11000 
          RX bytes:3896594863 (3.6 GiB)  TX bytes:3981526916 (3.7 GiB)
imq1      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          UP RUNNING NOARP  MTU:16000  Metric:1
          RX packets:13750734 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13861241 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:11000 
          RX bytes:1627889277 (1.5 GiB)  TX bytes:1660314572 (1.5 GiB)
lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1591000 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1591000 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:128446065 (122.4 MiB)  TX bytes:128446065 (122.4 MiB)
mast0     Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          UP RUNNING NOARP  MTU:16260  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
ra0       Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:07  
          inet6 addr: fe80::f68c:ebff:fecc:5307/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2629999 errors:1258 dropped:0 overruns:0 frame:0
          TX packets:3539362 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3000 
          RX bytes:550088673 (524.6 MiB)  TX bytes:3395270748 (3.1 GiB)
          Interrupt:4 
rai0      Link encap:Ethernet  HWaddr F4:8C:EB:CC:53:08  
          inet6 addr: fe80::f68c:ebff:fecc:5308/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:12859591 errors:2270 dropped:0 overruns:0 frame:0
          TX packets:15997526 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3000 
          RX bytes:1804602445 (1.6 GiB)  TX bytes:1043126619 (994.8 MiB)
          Interrupt:24