no firewall running while accessing the Internet? ...
user@debian:~$ sudo iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
user@debian:~$ sudo cat /etc/iptables.test.rules
cat: /etc/iptables.test.rules: No such file or directory
user@debian:~$ sudo ls -l /etc/iptables.test.rules
ls: cannot access /etc/iptables.test.rules: No such file or directory
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