| sysctl.3 (39022) | sysctl.3 (39267) |
|---|---|
| 1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 465 unchanged lines hidden (view full) --- 474.It NET\_RT\_IFLIST None 475.El 476.It Li PF_INET 477Get or set various global information about the internet protocols. 478The third level name is the protocol. 479The fourth level name is the variable name. 480The currently defined protocols and names are: 481.ne 1i | 1.\" Copyright (c) 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 465 unchanged lines hidden (view full) --- 474.It NET\_RT\_IFLIST None 475.El 476.It Li PF_INET 477Get or set various global information about the internet protocols. 478The third level name is the protocol. 479The fourth level name is the variable name. 480The currently defined protocols and names are: 481.ne 1i |
| 482.Bl -column "Protocol nameXXXXXX" "Variable nameXXX" "integerXXX" -offset indent 483.It Pa Protocol name Variable name Type Changeable | 482.Bl -column ProtocolXX VariableXX TypeXX ChangeableXX 483.It Pa Protocol Variable Type Changeable |
| 484.It ip forwarding integer yes 485.It ip redirect integer yes 486.It ip ttl integer yes 487.It icmp maskrepl integer yes | 484.It ip forwarding integer yes 485.It ip redirect integer yes 486.It ip ttl integer yes 487.It icmp maskrepl integer yes |
| 488.It icmp bmcastecho integer yes |
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| 488.It udp checksum integer yes 489.El 490.Pp 491The variables are as follows: 492.Bl -tag -width "123456" 493.It Li ip.forwarding 494Returns 1 when IP forwarding is enabled for the host, 495meaning that the host is acting as a router. 496.It Li ip.redirect 497Returns 1 when ICMP redirects may be sent by the host. 498This option is ignored unless the host is routing IP packets, 499and should normally be enabled on all systems. 500.It Li ip.ttl 501The maximum time-to-live (hop count) value for an IP packet sourced by 502the system. 503This value applies to normal transport protocols, not to ICMP. 504.It Li icmp.maskrepl 505Returns 1 if ICMP network mask requests are to be answered. | 489.It udp checksum integer yes 490.El 491.Pp 492The variables are as follows: 493.Bl -tag -width "123456" 494.It Li ip.forwarding 495Returns 1 when IP forwarding is enabled for the host, 496meaning that the host is acting as a router. 497.It Li ip.redirect 498Returns 1 when ICMP redirects may be sent by the host. 499This option is ignored unless the host is routing IP packets, 500and should normally be enabled on all systems. 501.It Li ip.ttl 502The maximum time-to-live (hop count) value for an IP packet sourced by 503the system. 504This value applies to normal transport protocols, not to ICMP. 505.It Li icmp.maskrepl 506Returns 1 if ICMP network mask requests are to be answered. |
| 507.It Li icmp.bmcastecho 508Returns 1 if an ICMP echo request to a broadcast or multicast address is 509to be answered. |
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| 506.It Li udp.checksum 507Returns 1 when UDP checksums are being computed and checked. 508Disabling UDP checksums is strongly discouraged. 509.El 510.Sh CTL_USER 511The string and integer information available for the CTL_USER level 512is detailed below. 513The changeable column shows whether a process with appropriate --- 223 unchanged lines hidden --- | 510.It Li udp.checksum 511Returns 1 when UDP checksums are being computed and checked. 512Disabling UDP checksums is strongly discouraged. 513.El 514.Sh CTL_USER 515The string and integer information available for the CTL_USER level 516is detailed below. 517The changeable column shows whether a process with appropriate --- 223 unchanged lines hidden --- |