Unblock ping

Signed-off-by: Tommy <contact@tommytran.io>

install.sh

@@ -606,7 +606,7 @@ forward-zone:
   forward-addr: 8.8.4.4#dns.google
   forward-addr: 2001:4860:4860::8888#dns.google
   forward-addr: 2001:4860:4860::8844#dns.google' | sudo tee /etc/unbound/unbound.conf
-  
+
     mkdir -p /etc/systemd/system/unbound.service.d
     echo $'[Service]
 MemoryDenyWriteExecute=true
@@ -637,8 +637,10 @@ LockPersonality=yes' | sudo tee /etc/systemd/system/unbound.service.d/override.c
     systemctl restart chronyd
 
     curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/etc/modprobe.d/30_security-misc.conf -o /etc/modprobe.d/30_security-misc.conf
-    curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990_security-misc.conf -o /etc/sysctl.d/990_security-misc.conf
-    sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/990_security-misc.conf
+    curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/990-security-misc.conf -o /etc/sysctl.d/990-security-misc.conf
+    sed -i 's/kernel.yama.ptrace_scope=2/kernel.yama.ptrace_scope=3/g' /etc/sysctl.d/990-security-misc.conf
+    sudo sed -i 's/net.ipv4.icmp_echo_ignore_all=1/net.ipv4.icmp_echo_ignore_all=0/g' /etc/sysctl.d/990-security-misc.conf
+    sudo sed -i 's/net.ipv6.icmp.echo_ignore_all=1/net.ipv6.icmp.echo_ignore_all=0/g' /etc/sysctl.d/990-security-misc.conf
     curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_silent-kernel-printk.conf -o /etc/sysctl.d/30_silent-kernel-printk.conf
     curl https://raw.githubusercontent.com/Kicksecure/security-misc/master/usr/lib/sysctl.d/30_security-misc_kexec-disable.conf -o /etc/sysctl.d/30_security-misc_kexec-disable.conf
     sysctl -p