Container A connection refused to container B

[DST73]

Hi,

my setup:
Container A running Pi-hole
Container B running dnscrypt-proxy (Port 5350) and cloudflared (Port 53) proxy

On container B
Welcome to Ubuntu 23.04 (GNU/Linux 6.2.16-14-pve x86_64) root@dnsproxy:~# ss -lp 'sport = :domain' Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port Process udp UNCONN 0 0 127.0.0.1:domain 0.0.0.0:* users:(("cloudflared",pid=104,fd=7)) udp UNCONN 0 0 127.0.2.1:domain 0.0.0.0:* users:(("dnscrypt-proxy",pid=109,fd=13),("systemd",pid=1,fd=40)) tcp LISTEN 0 4096 127.0.2.1:domain 0.0.0.0:* users:(("dnscrypt-proxy",pid=109,fd=12),("systemd",pid=1,fd=39)) tcp LISTEN 0 128 127.0.0.1:domain 0.0.0.0:* users:(("cloudflared",pid=104,fd=8)) root@dnsproxy:~# dig dnscrypt.info | grep SERVER ;; SERVER: 127.0.0.1#53(127.0.0.1) (UDP) root@dnsproxy:~# dig +short @127.0.0.1 cloudflare.com AAAA 2606:4700::6810:85e5 2606:4700::6810:84e5 root@dnsproxy:~# dnscrypt-proxy -resolve github.com -config /etc/dnscrypt-proxy/dnscrypt-proxy.toml Resolving [github.com] using 127.0.0.1 port 5350 Resolver : 172.71.249.52 Canonical name: github.com. IPv4 addresses: 140.82.121.3 IPv6 addresses: - Name servers : dns1.p08.nsone.net., dns2.p08.nsone.net., dns3.p08.nsone.net., dns4.p08.nsone.net., ns-1283.awsdns-32.org., ns-1707.awsdns-21.co.uk., ns-421.awsdns-52.com., ns-520.awsdns-01.net. DNSSEC signed : no Mail servers : 5 mail servers found HTTPS alias : - HTTPS info : - Host info : - TXT records : 1dx40j0v3l3cnnhd973dfvvrm6z1bjk5, M

From Container A
root@pihole:~# dig +short @192.168.178.97 cloudflare.com AAAA ;; communications error to 192.168.178.97#53: connection refused ;; communications error to 192.168.178.97#53: connection refused ;; communications error to 192.168.178.97#53: connection refused ;; no servers could be reached root@pihole:~# dig +short @192.168.178.97 -p5350 cloudflare.com AAAA ;; communications error to 192.168.178.97#5350: connection refused ;; communications error to 192.168.178.97#5350: connection refused ;; communications error to 192.168.178.97#5350: connection refused ;; no servers could be reached


Does someone know why I don't get a connection from A to B

Thanks!

 

[Chris]

Hi,
do you have a firewall enabled, possibly interfering with the traffic? Also, are both containers connected to the same bridge/network, are they in the same subnet? Try to ping the other container.