How can I fix the error: no working DCC servers dcc1.dcc-servers.net dcc2.dcc-servers.net dcc3.dcc-servers.net at 127.0.0.1?

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 127.0.0.1

You 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 answering

1. 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
  • DCC, dccifd
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