pflog: the default rulenr is "-1"#1089
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fichtner wants to merge 2 commits intothe-tcpdump-group:masterfrom
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pflog: the default rulenr is "-1"#1089fichtner wants to merge 2 commits intothe-tcpdump-group:masterfrom
fichtner wants to merge 2 commits intothe-tcpdump-group:masterfrom
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As reported by an OPNsense user doing a security scan pf/pflog can drop e.g. invalid length packets under the default rule which also uses a -1 value like subrulenr. Transform the displayed value from "4294967295" to "-1" in this case because it is more correct (although both are suboptimal for processing). FreeBSD: https://cgit.freebsd.org/src/tree/sys/netpfil/pf/pf_ioctl.c?id=3347078000c078f2e67214ef1ba2e0bffe1aea4f#n349 OpenBSD: https://github.com/openbsd/src/blob/142580dd4dc788acb41545aca79c845e04d1cb7d/sys/net/pf_ioctl.c#L242 See also: opnsense/core#6800
Author
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I don't mind changing the value to something else as requested as displaying "default" also makes sense, but it may have a bigger impact on parsers. |
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OpenBSD prints "def" in tcpdump. This is easier to understand for the user than -1 in output. |
fichtner
commented
Oct 9, 2023
Author
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@bluhm Thanks for the pointer. I've updated it accordingly. |
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As reported by an OPNsense user doing a security scan pf/pflog can drop e.g. invalid length packets under the default rule which also uses a -1 value like subrulenr.
Transform the displayed value from "4294967295" to "-1" in this case because it is more correct (although both are suboptimal for processing).
FreeBSD: https://cgit.freebsd.org/src/tree/sys/netpfil/pf/pf_ioctl.c?id=3347078000c078f2e67214ef1ba2e0bffe1aea4f#n349
OpenBSD: https://github.com/openbsd/src/blob/142580dd4dc788acb41545aca79c845e04d1cb7d/sys/net/pf_ioctl.c#L242
See also: opnsense/core#6800