Disable icmp timestamp responses on linux. Solution Was able to simply bloc...
Disable icmp timestamp responses on linux. Solution Was able to simply block the icmp protocol through this line: iptables -A OUTPUT --proto icmp -j DROP Since the linux ping command works via ICMP simply dropping it for networking would make ping fail. Per the results of a security scan, it has been suggested that we block ICMP timestamp & timestamp reply messages using the firewall (CVE-1999-0524). Feb 1, 2024 · Blocking ICMP responses can be achieved using firewall rules, with tools like iptables or firewalld. Currently, Firewalld is not used as the system is being protected by an external network firewall. May 6, 2024 · Although the ICMP timestamp request and reply vulnerabilities are low risk, they are easily mitigated. Learn about the ICMP timestamp vulnerability and how to mitigate it in Linux by blocking certain types of Internet Control Message Protocol at the firewall. Feb 21, 2025 · By disabling these responses, you'll be taking an essential step towards protecting your network from potential vulnerabilities and enhancing your overall cybersecurity posture. The problem seems rather simple, just blocking ICMP timestamp requests and replies, but after hours of web browsing and trying 3 different solutions, none of them have worked. Jan 24, 2018 · Restart UFW firewall to apply the rule, by issuing the below commands. ipv4. owgdx xmopm kfbby dtocns lftnn xoqct ehty sgwt gkfp saska
