UDP and TCP with target port 7 is also known as services "echo" (port 7) and "discard" (port 9). It may be a good idea to block this target ports in the firewall or disable that services on the target hosts (if not already done) or both.

Firewall and Router Issues – Roblox Support Firewall/Security Programs. A lot of antivirus or internet security software tries to control which programs can access the internet. Often, these programs err on the side of caution and by default many programs are not allowed access. The easiest thing to try is just turning your internet firewall software off, to see if that allows you to Windows client firewall and port settings - Configuration Remote Control. To use Configuration Manager remote control, allow the following port: Inbound: TCP Port 2701; Remote Assistance and Remote Desktop. To initiate Remote Assistance from the Configuration Manager console, add the custom program Helpsvc.exe and the inbound custom port TCP 135 to the list of permitted programs and services in Windows Firewall on the client computer. How to enable Ping (ICMP echo) on an Azure VM - Thomas Maurer

Firewall rules for ICMP (TCP/UDP port 7) - Cisco

Dec 04, 2018

PC1 -> LAN port –- PFSENSE --- WAN port <- PC2. I am just trying to test basic pass through so that I can move on to the actual real firewall setup. I can ping the LAN port just fine and have been using the webconfig, but I can't ping the WAN port, let along get any pass-through across networks.

tcp - PING port number? - Network Engineering Stack Exchange Ping use not port but protocol. Ping operates by sending Internet Control Message Protocol (ICMP) echo request packets to the target host and waiting for an ICMP echo reply. However, as a security consideration, this is often disabled.