Hosting provider simply.com is blocking AirVPN

[sunny.ice9423 0]

Not very important to me, but for your information it seems any website hosted by simply.com (even with custom domain name registration) is blocked when using AirVPN.

Found it through this URL: https://it4home.dk/index.php/2023/11/11/exploring-the-kea-dhcp-server-in-pfsense-23-09/
Displaying "555 Security Incident Detected Your request was blocked. - The public IP address assigned to you, by your internet provider, might be suffering from poor reputation: Look up IP reputation here. IP addresses from VPN providers or public networks often have poor reputation."

Going to suggested link https://www.simply.com/en/rbl/?ip=213.152.161.181 shows: "The IP-address is blacklisted due to bad reputation. The IP address has recently been used for spam, attack, malware, or similar on the internet. Contact the IP address provider and ask them to fix the problem."

WHOIS for domain it4home.dk shows:

Domain:               it4home.dk
DNS:                  it4home.dk
[...]

Nameservers
Hostname:             ns1.simply.com
Hostname:             ns2.simply.com
Hostname:             ns3.simply.com

 

[ss11 15]

They probably use a shitty blacklisting service provider.
Blacklists = false sense of security, but involves the least effort for their security responsible personnel, so this is the reason why blacklists providers even exist in the first place. There is the false positive effect that you end up blocking an unknown percent of real / genuine traffic, but somehow for them the tradeoff is worth it because they consider the abuse traffic is the larger percent.

I would never use a blacklist personally (in a security defense protocol).