Category Archives: netcat

measure network speed with netcat

destination: sudo nc -lkv 9999 > /dev/null src: dd if=/dev/zero bs=1024K count=512 | nc -v 9999 (copy 10meg data with block size 16k) Advertisements

Posted in netcat | Tagged | Leave a comment

netcat UDP port checking and scanning

nc -uvz 161 (checking for SNMP) nc -vvzu 80-4000   (port scanning from 80 to 4000)

Posted in netcat | Leave a comment

Database connection pooling with firewall troubleshooting tip: Use Netcat

Database connection pooling is useful and common feature for performance. However there are some cavets. Sometimes your sql query just got timed out, and you wonder why. If you suspect the TCP connection between your application hosted in DMZ to … Continue reading

Posted in firewall, netcat | Leave a comment