extensions/libxt_ipcomp.c.man - manifest_repos/iptables - Git at Google

 This module matches the parameters in IPcomp header of IPsec packets.
 .TP
 [\fB!\fP] \fB\-\-ipcompspi\fP \fIspi\fP[\fB:\fP\fIspi\fP]
 Matches IPcomp header CPI value.
 .TP
 \fB\-\-compres\fP
 Matches if the reserved field is filled with zero.
	This module matches the parameters in IPcomp header of IPsec packets.
	.TP
	[\fB!\fP] \fB\-\-ipcompspi\fP \fIspi\fP[\fB:\fP\fIspi\fP]
	Matches IPcomp header CPI value.
	.TP
	\fB\-\-compres\fP
	Matches if the reserved field is filled with zero.