You see the following error in the mail log or when viewing the status of the dccifd service:
Dec 10 07:50:59 test dccproc[1175]: no working DCC servers dcc1.dcc-servers.net dcc2.dcc-servers.net dcc3.dcc-servers.net ... at 127.0.0.1You see this when running the command cdcc info:
# 12/07/11 09:42:21 EET /var/lib/dcc/map
# Re-resolve names after 11:31:25 Check RTTs after 09:46:25
# 1 total, 0 working servers
IPv6 on version=3
dcc1.dcc-servers.net,- RTT+1000 ms anon
# undefined name or wrong IP version
dcc2.dcc-servers.net,- RTT+1000 ms anon
# undefined name or wrong IP version
dcc3.dcc-servers.net,- RTT+1000 ms anon
# undefined name or wrong IP version
dcc4.dcc-servers.net,- RTT+1000 ms anon
# undefined name or wrong IP version
dcc5.dcc-servers.net,- RTT+1000 ms anon
# undefined name or wrong IP version
@,- RTT-1000 ms 32768 secretXXX
# *127.0.0.1,-
# not answering
################
# 12/07/11 09:42:21 EET greylist /var/dcc/map
# Re-resolve names after 11:42:21 Check RTTs after 09:57:21
# 1 total, 0 working servers
# continue not asking greylist server 32 seconds after 1 failures
@,- Greylist 32768 secret1234567890
# *127.0.0.1,6276
# not answering1. First make sure that the correct port is opened on any internal and external firewalls. DCC requires that port 6277 UDP OUT be opened.
2. Once the correct port is opened you can run usually resolve this by running the command cdcc rtt to update the map file:
# cdcc rtt
# 06/17/24 05:20:09 MDT /var/lib/dcc/map
# Re-resolve names after 07:20:04 Check RTTs after 05:35:08
# 1384.96 ms threshold, 1347.22 ms average 12 total, 11 working servers
IPv6 on version=3
dcc1.dcc-servers.net,- RTT+1000 ms anon
# 38.124.232.227,- ID 1102
# 100% of 32 requests ok 284.96+1000 ms RTT 200 ms queue wait
# 72.18.213.52,- x.dcc-servers ID 104
# 100% of 32 requests ok 349.61+1000 ms RTT 300 ms queue wait
# 193.30.34.12,- www.nova53.net ID 1205
# 88% of 32 requests ok 396.41+1000 ms RTT 195 ms queue wait
dcc2.dcc-servers.net,- RTT+1000 ms anon
# 72.18.213.53,- x.dcc-servers ID 104
# 100% of 32 requests ok 349.63+1000 ms RTT 300 ms queue wait
# 204.90.71.235,- MGTINTERNET ID 1170
# 100% of 32 requests ok 286.30+1000 ms RTT 200 ms queue wait
dcc3.dcc-servers.net,- RTT+1000 ms anon
# 72.18.213.49,- x.dcc-servers ID 104
# 100% of 32 requests ok 349.64+1000 ms RTT 300 ms queue wait
# *184.23.168.46,- sonic ID 1254
# 100% of 32 requests ok 239.88+1000 ms RTT 200 ms queue wait
dcc4.dcc-servers.net,- RTT+1000 ms anon
# 137.208.8.63,- wuwien ID 1290
# 100% of 32 requests ok 372.90+1000 ms RTT 200 ms queue wait
# 212.223.102.90,- ID 1480
# 91% of 32 requests ok 388.08+1000 ms RTT 100 ms queue wait
dcc5.dcc-servers.net,- RTT+1000 ms anon
# 193.30.34.14,- www.nova53.net ID 1207
# 88% of 32 requests ok 396.31+1000 ms RTT 195 ms queue wait
# 212.223.15.198,- ID 1481
# 100% of 32 requests ok 288.04+1000 ms RTT 100 ms queue wait
@,- RTT-1000 ms 32768 secretXXX
# 127.0.0.1,-
# not answering
################
# 06/17/24 05:20:09 MDT greylist /var/lib/dcc/map
# Re-resolve names after 07:20:08
# 1 total, 0 working servers
# continue not asking greylist server 32 seconds after 1 failures
@,- Greylist 32768 secretXXX
# *127.0.0.1,6276
# not answering