PF.OS(5) - File Formats Manual

PF.OS(5) - File Formats Manual # PF.OS(5) - File Formats Manual NAME # pf.os - format of the operating system fingerprints file DESCRIPTION # The pf(4) firewall and the tcpdump(8) program can both fingerprint the operating system of hosts that originate an IPv4 TCP connection. The file consists of newline-separated records, one per fingerprint, containing nine colon (’:’) separated fields. These fields are as follows: window The TCP window size. ...