I try to repeat your guide, but encounter an error at the step “sudo /home/user/sing-box run -c /home/user/sing-box-config.json”
setup:
debian 11 server, debian 11 vm. qubes 4.1
sys-net vm < sys-firewall vm < vpn1-vless vm < vpn1-firewall vm < vpn2-vless vm
vless works fine in the vpn1-vless vm cube
curl ip4.me/api/ in vpn2 vm result:
user@vpn2-vless-nl:~$ sudo /home/user/sing-box run -c /home/user/sing-box-config.json
INFO[0000] router: updated default interface eth0, index 2
INFO[0000] inbound/tun[tun-in]: started at nekoray-tun
INFO[0000] sing-box started (0.33s)
INFO[0010] [4057855932 1ms] inbound/tun[tun-in]: inbound packet connection from 172.19.0.1:45785
INFO[0010] [4057855932 1ms] inbound/tun[tun-in]: inbound packet connection to 10.139.1.1:53
INFO[0010] outbound/vless[proxy]: outbound connection to 8.8.8.8:443
INFO[0010] outbound/vless[proxy]: outbound connection to 8.8.8.8:443
ERROR[0010] dns: exchange failed for ip4.me. IN A: Post "https://8.8.8.8/dns-query": reality verification failed
ERROR[0010] dns: exchange failed for ip4.me. IN AAAA: Post "https://8.8.8.8/dns-query": context canceled
INFO[0015] [1939972979 0ms] inbound/tun[tun-in]: inbound packet connection from 172.19.0.1:39437
INFO[0015] [1939972979 0ms] inbound/tun[tun-in]: inbound packet connection to 10.139.1.2:53
INFO[0015] outbound/vless[proxy]: outbound connection to 8.8.8.8:443
INFO[0015] outbound/vless[proxy]: outbound connection to 8.8.8.8:443
ERROR[0015] dns: exchange failed for ip4.me. IN AAAA: Post "https://8.8.8.8/dns-query": reality verification failed
ERROR[0015] dns: exchange failed for ip4.me. IN A: Post "https://8.8.8.8/dns-query": context canceled
I tried configuring the vpn on another server, but the result is the same. How can I try to diagnostic the problem?