Test network setup

Range of tested devices

11 Netgear 10 D-Link 6 Linksys 3 Belkin 2 Buffalo, Asus 1 Zyxel, Webee,

Unicom, Telewell, SMC, Netwjork, Jensen, Edimax, Apple, A-Link

45 devices total Only ethernet to

ethernet devices (no ADSL or cable modems)

Tests & output “random” options

5 random bytes as payload

Option kinds 111 and 151 (just picked two).

Source IP address and port as option payload Again option kinds 111

and 151.

All tested devices seem to pass unknown options unaltered in SYN, SYN-ACK, FIN, data and pure ACK TCP segments in both directions.

Some boxes mangle some options, ie. MSS

Most of the boxes pass even malformed options just fine, the “smart” ones tend to drop them.