Debian 10 keeps blocking my phone's ip

[thunderzhao]

hi Guys, I had a new install on debian 10 on amazon lightsail. my iphone uses groundwire from acrobit,
whenever i switch from wifi to mobile connection, iptables drops my ip, Chain sip-auth-ip, i thought fail2ban did that, so i disable it by using: service fail2ban stop. deleted iptables entry, but as soon i switch from wifi to mobile, ip got blocked again. so i stopped iptables-persistent, but ip still getting blocked, does anyone know what program is doing that?
thank you

 

[DigitalDaz]

The implication there from the chain is that the invite/reg is going to xxx@ipaddress.

It should be xxx@domain.com

 

[thunderzhao]

thank you DitialDaz, i should change to domain, it's safer, right?

 

[DigitalDaz]

Yes, 99.999% of time the hackers will send to xxx@ipaddress