• Non-Routable IPs

   10.  0.0.0/8  ( 10.  0.0.1 –  10.255.255.254) 16,777,214 IPs
  172. 16.0.0/12 (172. 16.0.1 – 172. 31.255.254)  1,048,574 IPs
  192.168.0.0/16 (192.168.0.1 – 192.168.255.254)     65,534 IPs
  
  # carrier
  100. 64.0.0/10 (100. 64.0.1 - 100.127.255.254)  4,194,302 IPs 
  
  
  curl -v ipv4.icanhazip.com
  curl -v -6 ipv6.icanhazip.com

  • https://en.wikipedia.org/wiki/Private_network

• IpCalcd

  • https://jodies.de/ipcalc

Protocols

DNS

Tech

• https://www.iana.org/

• curl https://httpbin.j3ss.co/ip

• Wireshark

  • https://www.wireshark.org/

  • https://www.freecodecamp.org/news/learn-wireshark-computer-networking/

• Virtual Routers

  • https://blog.kroy.io/2019/08/23/battle-of-the-virtual-routers/

  • Run OpenWrt on Proxmox

    • OneMarcFifty on YouTube

    • https://www.jwtechtips.top/how-to-install-openwrt-in-proxmox/

• Lawrence Systems Networking Playlist on youtube

  • https://www.youtube.com/user/TheTecknowledge/videos

• HTTPS Proxy

  • https://mitmproxy.org/

  • https://github.com/localtunnel/localtunnel

Security

• Encrypt traffic on an overlay network - docker swarm

• Network ingress mode - search for encrypted

• Internet Security Research Group

• port scanning tools

  • https://www.digitalocean.com/community/tutorials/how-to-use-nmap-to-scan-for-open-ports

  nmap -n -PN -sT -sU -p- scanme.nmap.org
  
  lsof -ni:80 # process listening on port 80
  
  # netstat
  # ss - new (ubuntu only?)
  ss -nlt # tcp listening
  

• Run whois on IP list

  # whois on IPs
  for i in $(cat 2023-07-24-trouble.log|grep client_ip|awk -Fclient_ip '{print $2}'|sort -u |cut -d\" -f3); \
  do \
  	echo '----'; echo $i; \
  	whois $i; \
  done \
  |egrep '^[0-9]|^\-|OrgName|StateProv|Address|City'

• Port checks

  # from mailcow.email
  ss -tlpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190'
  # or:
  netstat -tulpn | grep -E -w '25|80|110|143|443|465|587|993|995|4190'

• iptables on Linux

  • https://unrouted.uk/blog/docker-firewall/

• VPN

  • WorkingVPN

  • https://www.twingate.com/

  • VPN Service list

    • https://en.wikipedia.org/wiki/VPN_service

  Service Mesh

  WireGuard

  OpenVPN

• Morris Network

  # add routes and add IP/32 to wireguard allowed IPs
  dns-sd -q xx
  192.168.1.149 # xx
  192.168.1.102 # yy
  192.168.1.128 # ss and pg
  
  route add -host 192.168.1.128 10.0.0.1
  route add -host 54.81.143.201 -interface en0
  
  route get xx