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> Not sure if I'd like to send anything into tested port just to tell if it is open. can you elaborate? From a stealth perspective, probing for a port will alw
by Eduard 3y ago
> Not sure if I'd like to send anything into tested port just to tell if it is open.
can you elaborate? From a stealth perspective, probing for a port will always reveal to the other side that they are being probed
- winrid 3y agoCould crash the server if it's badly written
- Snawoot 3y agoIt's not about stealth, it's about a bad habit of sending some bytes without thinking how it will be interpreted. Examples: - Syslog-ng server will interpret it as valid log messages - HP JetDirect on port 9100 will print HTTP request: https://twitter.com/AviKivity/status/1405147699557638145 https://twitter.com/AviKivity/status/1405147699557638145 - What if service is protected by fail2ban and accounting protocol errors? After all, sending anything was not my intention, so I won't send.