An IP address earns a negative reputation when an Information security company detects suspicious activity, such as spam or viruses originating from that address.
IP-reputation is top-level protection that’s running on any IPS solution and WAF solution because if they found traffic is coming from bad IP-reputation address, so need to use check it just block it.
Way To check the reputation of an IP address:-
Check Reputation of an IP address with Cisco Talos
Talos ( Previously Senderbase.org) comprises of leading-edge cyber threat intelligence team providing various network security solutions for unwanted intrusion from both known and unknown sources.
Navigate to https://talosintelligence.com/ and enter your IP here that you want to check the reputation of an IP-address.
it will show you the SPAM Blacklisting and email reputation of an IP-address.
Check Reputation of an IP address with MX toolbox
MX Toolbox is another most popular tool to check the IP-reputation of an IP-address, SPAM lookup, Domain health etc.
Navigate to https://mxtoolbox.com/blacklists.aspx and enter your IP-address that you want’s to check the reputation.
Check IP Reputation with IBM X-Force Threat Intelligence
IBM X-Force Research is one of the most renowned commercial security research teams in the world.
These security professionals monitor and analyze security issues from a variety of sources, providing threat intelligence content as the foundation of the IBM Security portfolio.
IBM® X-Force® produces many thought leadership security research assets to help customers, fellow researchers and the public at large better understand the latest security risks and stay ahead of emerging threats.
Navigate to https://exchange.xforce.ibmcloud.com/ and enter your IP address to view the IP reputation
Check IP Reputation with Barracuda central
Barracuda Central maintains a history of IP addresses for both known spammers as well as senders with good email practices.
This information contributes to the Barracuda Reputation System, which gives the Barracuda Spam & Virus Firewall the ability to block or allow a message based on the sender’s IP address.
Check IP Reputation with Symantec IP Reputation Investigation
An IP address earns a negative reputation when Symantec detects suspicious activity, such as spam or viruses originating from that address.
Symantec strongly recommends that you perform a security audit on any of your systems that correspond to an IP address with a negative reputation, as those systems may have been compromised.
Navigate to http://ipremoval.sms.symantec.com/lookup/ and enter your IP-address that you want’s to check the reputation of an IP-address.
Personally, I love to use https://www.abuseipdb.com/ which is providing much accurate reputation.
Hope my article “How to check the reputation of an IP address” helps you to understand IP-reputation and how to check it.
Also, Check Top 5 DDOS attack protection Providers