latuminggi

### Disable ICMP Timestamp Response Ubuntu LTS ###

# sysctl disable tcp_timestamps
echo 0 > /proc/sys/net/ipv4/tcp_timestamps && \
echo "net.ipv4.tcp_timestamps = 0" > /etc/sysctl.d/tcp_timestamps.conf && \
sysctl -p && \
sysctl -a | grep "net\.ipv4\.tcp_timestamps"

# open icmp to specified segment
iptables -A INPUT -s 10.10.0.0/16 -p icmp -m icmp --icmp-type 8 -j ACCEPT

fntlnz

Create Root CA (Done once)

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl genrsa -des3 -out rootCA.key 4096