1 / 7

Assumption

Assumption. You’re not a “networking guy” and you don’t want to be Networking infrastructure is configured properly Packets go where they’re told to go. Steve Evans – scevanscg.com. Ports. TCP (Transmission Control Protocol) State, Handshake, Confirmed UDP (User Datagram Protocol)

hedy
Download Presentation

Assumption

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Assumption • You’re not a “networking guy” and you don’t want to be • Networking infrastructure is configured properly • Packets go where they’re told to go Steve Evans – scevanscg.com

  2. Ports • TCP (Transmission Control Protocol) • State, Handshake, Confirmed • UDP (User Datagram Protocol) • Stateless, No Confirmation • Numbers • 1-1023 Well Known • 80 = HTTP, 443 = HTTPS, 25 = SMTP, 53 = DNS • 1024-49151 Registered • http://www.iana.org/assignments/port-numbers • 49152-65535 Dynamic Steve Evans – scevanscg.com

  3. Ports • DEMO • Telnet • NMAP (http://nmap.org/ ) Steve Evans – scevanscg.com

  4. Sniffing Packets • DEMO • Wireshark (http://wireshark.org/ ) • Read web page • Send Email Steve Evans – scevanscg.com

  5. Name Resolution server1.comp.com? ns1.comp.com 10.0.0.15 Steve Evans – scevanscg.com

  6. 67.205.50.110 scevanscg.com NS .com NS Root NS blog.scevanscg.com? scevanscg.com? .com? blog.scevanscg.com? ns1.comp.com 67.205.50.110 Steve Evans – scevanscg.com

  7. www? ns1.comp.com Does not exist www.comp.com? 10.0.0.16 Suffix Search List: comp.com scevanscg.com Steve Evans – scevanscg.com

More Related