How SSH Connects: The -vvv Tour, Line by Line [Under the Hood]
hafeez@unixshadow: ~/.ssh/debug.log hafeez@unixshadow:~$ ssh -vvv deploy@web1 # the -vvv tour, line by line How SSH ConnectsThe -vvv Tour, Line by […]
TLS 1.3 Handshake: How HTTPS Gets Its Stripes [Under the Hood]
hafeez@unixshadow: ~/client-hello.pcap hafeez@unixshadow:~$ openssl s_client -connect unixshadow.com:443 # how HTTPS gets its S TLS 1.3 HandshakeHow HTTPS Gets Its Stripes […]
DNS Resolution: From URL to IP, Packet by Packet [Under the Hood]
hafeez@unixshadow: ~/dig.trace hafeez@unixshadow:~$ dig +trace unixshadow.com # from URL to IP, packet by packet DNS ResolutionFrom URL to IP, Packet […]
TCP 3-Way Handshake: How Every Connection Begins [Under the Hood]
hafeez@unixshadow: ~/capture.pcap hafeez@unixshadow:~$ sudo tcpdump -i eth0 ‘tcp port 443’ # the 3-way handshake, live TCP 3-Way HandshakeHow Every Connection […]
The OSI Model: 7 Layers of Networking [Under the Hood]
hafeez@unixshadow: ~/packet.bin hafeez@unixshadow:~$ ping -c1 203.0.113.7 # then: what each layer added on the way down The OSI Model7 Layers […]
Linux Boot Sequence: From Power-On to Login Prompt [Under the Hood]
hafeez@unixshadow: /var/log/boot.log hafeez@unixshadow:~$ journalctl –list-boots | head -1 # what actually happens at boot Linux Boot SequenceFrom Power-On to Login […]