I already published a few examples how you can use layer four traceroutes in order to pass firewall policies that block ping but allow some well-known ports such as 80 or 443. Long story short: Using TCP SYN packets on an opened firewall port with the TTL trick will probably succeed compared to a classical … Continue reading Discovering Policy-Based Routes with Layer 4 Traceroutes (LFT)
I already published a few examples how you can use layer four traceroutes in order to pass firewall policies that block ping but allow some well-known ports such as 80 or 443. Long story short: Using TCP SYN packets on an opened firewall port with the TTL trick will probably succeed compared to a classical … Continue reading Discovering Policy-Based Routes with Layer 4 Traceroutes (LFT)