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ipv6 incorrectly detected (watchdog/sieve/dovecot) #5668

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ipv6 incorrectly detected (watchdog/sieve/dovecot)#5668
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@kwisatz

Description

@kwisatz
kwisatz
opened on Jan 23, 2024

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  • ... I have understood that this bug report is dedicated for bugs, and not for support-related inquiries.
  • ... I have understood that answers are voluntary and community-driven, and not commercial support.
  • ... I have verified that my issue has not been already answered in the past. I also checked previous issues.

Description

Upon container start, I'm receiving the following watchdog email:

Tue Jan 23 21:36:45 CET 2024 - enable_ipv6 is true in docker-compose.yml, but an IPv6 link could not be established. Please verify your IPv6 connection.

However, enable_ipv6 is not true in my docker-compose.yml, nor in the override file:

root@melmac:/opt/mailcow-dockerized# grep -R 'enable_ipv6:' docker-compose.*
docker-compose.yml:    enable_ipv6: false

I have followed https://docs.mailcow.email/post_installation/firststeps-disable_ipv6/ to the letter and this has worked in the past.

Logs:

No relevant logs found

Steps to reproduce:

Unsure

Which branch are you using?

master

Which architecture are you using?

x86

Operating System:

Debian 11.8

Server/VM specifications:

8Gb, 4 cores

Is Apparmor, SELinux or similar active?

no

Virtualization technology:

KVM

Docker version:

25.0.0

docker-compose version or docker compose version:

v2.24.1

mailcow version:

2024-01b

Reverse proxy:

Nginx

Logs of git diff:

index c1883f90..a0a1bb10 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -605,42 +605,12 @@ services:
           aliases:
             - ofelia
 
-    ipv6nat-mailcow:
-      depends_on:
-        - unbound-mailcow
-        - mysql-mailcow
-        - redis-mailcow
-        - clamd-mailcow
-        - rspamd-mailcow
-        - php-fpm-mailcow
-        - sogo-mailcow
-        - dovecot-mailcow
-        - postfix-mailcow
-        - memcached-mailcow
-        - nginx-mailcow
-        - acme-mailcow
-        - netfilter-mailcow
-        - watchdog-mailcow
-        - dockerapi-mailcow
-        - solr-mailcow
-      environment:
-        - TZ=${TZ}
-      image: robbertkl/ipv6nat
-      security_opt:
-        - label=disable
-      restart: always
-      privileged: true
-      network_mode: "host"
-      volumes:
-        - /var/run/docker.sock:/var/run/docker.sock:ro
-        - /lib/modules:/lib/modules:ro
-
 networks:
   mailcow-network:
     driver: bridge
     driver_opts:
       com.docker.network.bridge.name: br-mailcow
-    enable_ipv6: true
+    enable_ipv6: false
     ipam:
       driver: default
       config:

Logs of iptables -L -vn:

# Warning: iptables-legacy tables present, use iptables-legacy to see them
Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy DROP 1 packets, 64 bytes)
 pkts bytes target     prot opt in     out     source               destination         
70312   23M MAILCOW    all  --  *      *       0.0.0.0/0            0.0.0.0/0            /* mailcow */
71421   23M DOCKER-USER  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
71421   23M DOCKER-ISOLATION-STAGE-1  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
53709   20M ACCEPT     all  --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
 3877  245K DOCKER     all  --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0           
13835 2987K ACCEPT     all  --  br-mailcow !br-mailcow  0.0.0.0/0            0.0.0.0/0           
 3609  229K ACCEPT     all  --  br-mailcow br-mailcow  0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
    0     0 DOCKER     all  --  *      docker0  0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     all  --  docker0 docker0  0.0.0.0/0            0.0.0.0/0           

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination
Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.249         tcp dpt:6379
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.5           tcp dpt:8983
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.8           tcp dpt:3306
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:12345
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:4190
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:995
   61  3969 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:993
   29  1856 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:143
    0     0 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.250         tcp dpt:110
    1    60 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:587
   15   880 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:465
    9   508 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.253         tcp dpt:25
   73  4312 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.14          tcp dpt:443
   72  4300 ACCEPT     tcp  --  !br-mailcow br-mailcow  0.0.0.0/0            172.22.1.14          tcp dpt:80

Chain DOCKER-ISOLATION-STAGE-1 (1 references)
 pkts bytes target     prot opt in     out     source               destination         
13835 2987K DOCKER-ISOLATION-STAGE-2  all  --  br-mailcow !br-mailcow  0.0.0.0/0            0.0.0.0/0           
    0     0 DOCKER-ISOLATION-STAGE-2  all  --  docker0 !docker0  0.0.0.0/0            0.0.0.0/0           
  21M   13G RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain DOCKER-ISOLATION-STAGE-2 (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DROP       all  --  *      br-mailcow  0.0.0.0/0            0.0.0.0/0           
    0     0 DROP       all  --  *      docker0  0.0.0.0/0            0.0.0.0/0           
3853K 2392M RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain DOCKER-USER (1 references)
 pkts bytes target     prot opt in     out     source               destination         
  72M   48G RETURN     all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain MAILCOW (1 references)
 pkts bytes target     prot opt in     out     source               destination         
  144  8560 DROP       all  --  *      *       194.169.175.10       0.0.0.0/0           
  170 10200 DROP       all  --  *      *       141.98.11.68         0.0.0.0/0           
    0     0 DROP       all  --  *      *       91.215.85.17         0.0.0.0/0           
    0     0 DROP       all  --  *      *       46.148.40.0/24       0.0.0.0/0

Logs of ip6tables -L -vn:

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
10865 7656K MAILCOW    all      *      *       ::/0                 ::/0                 /* mailcow */
12881 7812K DOCKER-USER  all      *      *       ::/0                 ::/0                
12881 7812K DOCKER-ISOLATION-STAGE-1  all      *      *       ::/0                 ::/0                
 7251 7431K ACCEPT     all      *      br-mailcow  ::/0                 ::/0                 ctstate RELATED,ESTABLISHED
 5630  381K DOCKER     all      *      br-mailcow  ::/0                 ::/0                
    0     0 ACCEPT     all      br-mailcow !br-mailcow  ::/0                 ::/0                
 5630  381K ACCEPT     all      br-mailcow br-mailcow  ::/0                 ::/0                
    0     0 ACCEPT     all      *      docker0  ::/0                 ::/0                 ctstate RELATED,ESTABLISHED
    0     0 DOCKER     all      *      docker0  ::/0                 ::/0                
    0     0 ACCEPT     all      docker0 !docker0  ::/0                 ::/0                
    0     0 ACCEPT     all      docker0 docker0  ::/0                 ::/0                

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:4190
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:995
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:993
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:143
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::f  tcp dpt:110
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::13  tcp dpt:587
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::13  tcp dpt:465
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::13  tcp dpt:25
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::14  tcp dpt:443
    0     0 ACCEPT     tcp      !br-mailcow br-mailcow  ::/0                 fd4d:6169:6c63:6f77::14  tcp dpt:80

Chain DOCKER-ISOLATION-STAGE-1 (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER-ISOLATION-STAGE-2  all      br-mailcow !br-mailcow  ::/0                 ::/0                
    0     0 DOCKER-ISOLATION-STAGE-2  all      docker0 !docker0  ::/0                 ::/0                
1737K 1991M RETURN     all      *      *       ::/0                 ::/0                

Chain DOCKER-ISOLATION-STAGE-2 (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DROP       all      *      br-mailcow  ::/0                 ::/0                
    0     0 DROP       all      *      docker0  ::/0                 ::/0                
    0     0 RETURN     all      *      *       ::/0                 ::/0                

Chain DOCKER-USER (1 references)
 pkts bytes target     prot opt in     out     source               destination         
1737K 1991M RETURN     all      *      *       ::/0                 ::/0                

Chain MAILCOW (1 references)
 pkts bytes target     prot opt in     out     source               destination

Logs of iptables -L -vn -t nat:

# Warning: iptables-legacy tables present, use iptables-legacy to see them
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
 109K 6718K DOCKER     all  --  *      *       0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
 5015  301K DOCKER     all  --  *      *       0.0.0.0/0           !127.0.0.0/8          ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
 4448  301K MASQUERADE  all  --  *      !br-mailcow  172.22.1.0/24        0.0.0.0/0           
    0     0 MASQUERADE  all  --  *      !docker0  172.17.0.0/16        0.0.0.0/0           
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.249         172.22.1.249         tcp dpt:6379
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.5           172.22.1.5           tcp dpt:8983
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.8           172.22.1.8           tcp dpt:3306
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:12345
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:4190
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:995
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:993
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:143
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.250         172.22.1.250         tcp dpt:110
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.253         172.22.1.253         tcp dpt:587
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.253         172.22.1.253         tcp dpt:465
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.253         172.22.1.253         tcp dpt:25
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.14          172.22.1.14          tcp dpt:443
    0     0 MASQUERADE  tcp  --  *      *       172.22.1.14          172.22.1.14          tcp dpt:80

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 RETURN     all  --  br-mailcow *       0.0.0.0/0            0.0.0.0/0           
    0     0 RETURN     all  --  docker0 *       0.0.0.0/0            0.0.0.0/0           
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:7654 to:172.22.1.249:6379
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:18983 to:172.22.1.5:8983
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:13306 to:172.22.1.8:3306
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            127.0.0.1            tcp dpt:19991 to:172.22.1.250:12345
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:4190 to:172.22.1.250:4190
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:995 to:172.22.1.250:995
   63  4077 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:993 to:172.22.1.250:993
   38  2404 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:143 to:172.22.1.250:143
    0     0 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:110 to:172.22.1.250:110
    1    60 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:587 to:172.22.1.253:587
  336 20140 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:465 to:172.22.1.253:465
   15   868 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:25 to:172.22.1.253:25
   74  4348 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:443 to:172.22.1.14:443
   69  4092 DNAT       tcp  --  !br-mailcow *       0.0.0.0/0            0.0.0.0/0            tcp dpt:80 to:172.22.1.14:80

Logs of ip6tables -L -vn -t nat:

# Warning: iptables-legacy tables present, use iptables-legacy to see them
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
 109K 6718K DOCKER     all  --  *      *       0.0.0.0/0            0.0.0.0/0            ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

root@melmac:/opt/mailcow-dockerized# ip6tables -L -vn -t nat
Chain PREROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER     all      *      *       ::/0                 ::/0                 ADDRTYPE match dst-type LOCAL

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 DOCKER     all      *      *       ::/0                !::1                  ADDRTYPE match dst-type LOCAL

Chain POSTROUTING (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 MASQUERADE  all      *      !br-mailcow  fd4d:6169:6c63:6f77::/64  ::/0                
    0     0 MASQUERADE  all      *      !docker0  fd00:dead:beef:c0::/80  ::/0                
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:4190
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:995
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:993
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:143
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::f  fd4d:6169:6c63:6f77::f  tcp dpt:110
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::13  fd4d:6169:6c63:6f77::13  tcp dpt:587
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::13  fd4d:6169:6c63:6f77::13  tcp dpt:465
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::13  fd4d:6169:6c63:6f77::13  tcp dpt:25
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::14  fd4d:6169:6c63:6f77::14  tcp dpt:443
    0     0 MASQUERADE  tcp      *      *       fd4d:6169:6c63:6f77::14  fd4d:6169:6c63:6f77::14  tcp dpt:80

Chain DOCKER (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 RETURN     all      br-mailcow *       ::/0                 ::/0                
    0     0 RETURN     all      docker0 *       ::/0                 ::/0                
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:4190 to:[fd4d:6169:6c63:6f77::f]:4190
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:995 to:[fd4d:6169:6c63:6f77::f]:995
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:993 to:[fd4d:6169:6c63:6f77::f]:993
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:143 to:[fd4d:6169:6c63:6f77::f]:143
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:110 to:[fd4d:6169:6c63:6f77::f]:110
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:587 to:[fd4d:6169:6c63:6f77::13]:587
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:465 to:[fd4d:6169:6c63:6f77::13]:465
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:25 to:[fd4d:6169:6c63:6f77::13]:25
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:443 to:[fd4d:6169:6c63:6f77::14]:443
    0     0 DNAT       tcp      !br-mailcow *       ::/0                 ::/0                 tcp dpt:80 to:[fd4d:6169:6c63:6f77::14]:80

DNS check:

172.64.155.249
104.18.32.7

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