/usr/src/xtables-addons-2.12/extensions/xt_psd.h is in xtables-addons-dkms 2.12-0.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | #ifndef _LINUX_NETFILTER_XT_PSD_H
#define _LINUX_NETFILTER_XT_PSD_H 1
#include <linux/param.h>
#include <linux/types.h>
/*
* High port numbers have a lower weight to reduce the frequency of false
* positives, such as from passive mode FTP transfers.
*/
#define PORT_WEIGHT_PRIV 3
#define PORT_WEIGHT_HIGH 1
#define PSD_MAX_RATE 10000
/*
* Port scan detection thresholds: at least COUNT ports need to be scanned
* from the same source, with no longer than DELAY ticks between ports.
*/
#define SCAN_MIN_COUNT 7
#define SCAN_MAX_COUNT (SCAN_MIN_COUNT * PORT_WEIGHT_PRIV)
#define SCAN_WEIGHT_THRESHOLD SCAN_MAX_COUNT
struct xt_psd_info {
__u32 weight_threshold;
__u32 delay_threshold;
__u16 lo_ports_weight;
__u16 hi_ports_weight;
};
#endif /*_LINUX_NETFILTER_XT_PSD_H*/
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