1 /proc/sys/net/ipv4/* Variables:
7 Forward Packets between interfaces.
9 This variable is special, its change resets all configuration
10 parameters to their default state (RFC1122 for hosts, RFC1812
13 ip_default_ttl - INTEGER
16 ip_no_pmtu_disc - BOOLEAN
17 Disable Path MTU Discovery.
21 default 562 - minimum discovered Path MTU
24 Time, in seconds, that cached PMTU information is kept.
27 The advertised MSS depends on the first hop route MTU, but will
28 never be lower than this setting.
32 ipfrag_high_thresh - INTEGER
33 Maximum memory used to reassemble IP fragments. When
34 ipfrag_high_thresh bytes of memory is allocated for this purpose,
35 the fragment handler will toss packets until ipfrag_low_thresh
38 ipfrag_low_thresh - INTEGER
39 See ipfrag_high_thresh
42 Time in seconds to keep an IP fragment in memory.
44 ipfrag_secret_interval - INTEGER
45 Regeneration interval (in seconds) of the hash secret (or lifetime
46 for the hash secret) for IP fragments.
51 inet_peer_threshold - INTEGER
52 The approximate size of the storage. Starting from this threshold
53 entries will be thrown aggressively. This threshold also determines
54 entries' time-to-live and time intervals between garbage collection
55 passes. More entries, less time-to-live, less GC interval.
57 inet_peer_minttl - INTEGER
58 Minimum time-to-live of entries. Should be enough to cover fragment
59 time-to-live on the reassembling side. This minimum time-to-live is
60 guaranteed if the pool size is less than inet_peer_threshold.
61 Measured in jiffies(1).
63 inet_peer_maxttl - INTEGER
64 Maximum time-to-live of entries. Unused entries will expire after
65 this period of time if there is no memory pressure on the pool (i.e.
66 when the number of entries in the pool is very small).
67 Measured in jiffies(1).
69 inet_peer_gc_mintime - INTEGER
70 Minimum interval between garbage collection passes. This interval is
71 in effect under high memory pressure on the pool.
72 Measured in jiffies(1).
74 inet_peer_gc_maxtime - INTEGER
75 Minimum interval between garbage collection passes. This interval is
76 in effect under low (or absent) memory pressure on the pool.
77 Measured in jiffies(1).
82 Controls Appropriate Byte Count defined in RFC3465. If set to
83 0 then does congestion avoid once per ack. 1 is conservative
84 value, and 2 is more agressive.
86 tcp_syn_retries - INTEGER
87 Number of times initial SYNs for an active TCP connection attempt
88 will be retransmitted. Should not be higher than 255. Default value
89 is 5, which corresponds to ~180seconds.
91 tcp_synack_retries - INTEGER
92 Number of times SYNACKs for a passive TCP connection attempt will
93 be retransmitted. Should not be higher than 255. Default value
94 is 5, which corresponds to ~180seconds.
96 tcp_keepalive_time - INTEGER
97 How often TCP sends out keepalive messages when keepalive is enabled.
100 tcp_keepalive_probes - INTEGER
101 How many keepalive probes TCP sends out, until it decides that the
102 connection is broken. Default value: 9.
104 tcp_keepalive_intvl - INTEGER
105 How frequently the probes are send out. Multiplied by
106 tcp_keepalive_probes it is time to kill not responding connection,
107 after probes started. Default value: 75sec i.e. connection
108 will be aborted after ~11 minutes of retries.
110 tcp_retries1 - INTEGER
111 How many times to retry before deciding that something is wrong
112 and it is necessary to report this suspicion to network layer.
113 Minimal RFC value is 3, it is default, which corresponds
114 to ~3sec-8min depending on RTO.
116 tcp_retries2 - INTEGER
117 How may times to retry before killing alive TCP connection.
118 RFC1122 says that the limit should be longer than 100 sec.
119 It is too small number. Default value 15 corresponds to ~13-30min
122 tcp_orphan_retries - INTEGER
123 How may times to retry before killing TCP connection, closed
124 by our side. Default value 7 corresponds to ~50sec-16min
125 depending on RTO. If you machine is loaded WEB server,
126 you should think about lowering this value, such sockets
127 may consume significant resources. Cf. tcp_max_orphans.
129 tcp_fin_timeout - INTEGER
130 Time to hold socket in state FIN-WAIT-2, if it was closed
131 by our side. Peer can be broken and never close its side,
132 or even died unexpectedly. Default value is 60sec.
133 Usual value used in 2.2 was 180 seconds, you may restore
134 it, but remember that if your machine is even underloaded WEB server,
135 you risk to overflow memory with kilotons of dead sockets,
136 FIN-WAIT-2 sockets are less dangerous than FIN-WAIT-1,
137 because they eat maximum 1.5K of memory, but they tend
138 to live longer. Cf. tcp_max_orphans.
140 tcp_max_tw_buckets - INTEGER
141 Maximal number of timewait sockets held by system simultaneously.
142 If this number is exceeded time-wait socket is immediately destroyed
143 and warning is printed. This limit exists only to prevent
144 simple DoS attacks, you _must_ not lower the limit artificially,
145 but rather increase it (probably, after increasing installed memory),
146 if network conditions require more than default value.
148 tcp_tw_recycle - BOOLEAN
149 Enable fast recycling TIME-WAIT sockets. Default value is 0.
150 It should not be changed without advice/request of technical
153 tcp_tw_reuse - BOOLEAN
154 Allow to reuse TIME-WAIT sockets for new connections when it is
155 safe from protocol viewpoint. Default value is 0.
156 It should not be changed without advice/request of technical
159 tcp_max_orphans - INTEGER
160 Maximal number of TCP sockets not attached to any user file handle,
161 held by system. If this number is exceeded orphaned connections are
162 reset immediately and warning is printed. This limit exists
163 only to prevent simple DoS attacks, you _must_ not rely on this
164 or lower the limit artificially, but rather increase it
165 (probably, after increasing installed memory),
166 if network conditions require more than default value,
167 and tune network services to linger and kill such states
168 more aggressively. Let me to remind again: each orphan eats
169 up to ~64K of unswappable memory.
171 tcp_abort_on_overflow - BOOLEAN
172 If listening service is too slow to accept new connections,
173 reset them. Default state is FALSE. It means that if overflow
174 occurred due to a burst, connection will recover. Enable this
175 option _only_ if you are really sure that listening daemon
176 cannot be tuned to accept connections faster. Enabling this
177 option can harm clients of your server.
179 tcp_syncookies - BOOLEAN
180 Only valid when the kernel was compiled with CONFIG_SYNCOOKIES
181 Send out syncookies when the syn backlog queue of a socket
182 overflows. This is to prevent against the common 'syn flood attack'
185 Note, that syncookies is fallback facility.
186 It MUST NOT be used to help highly loaded servers to stand
187 against legal connection rate. If you see synflood warnings
188 in your logs, but investigation shows that they occur
189 because of overload with legal connections, you should tune
190 another parameters until this warning disappear.
191 See: tcp_max_syn_backlog, tcp_synack_retries, tcp_abort_on_overflow.
193 syncookies seriously violate TCP protocol, do not allow
194 to use TCP extensions, can result in serious degradation
195 of some services (f.e. SMTP relaying), visible not by you,
196 but your clients and relays, contacting you. While you see
197 synflood warnings in logs not being really flooded, your server
198 is seriously misconfigured.
201 Use the Host requirements interpretation of the TCP urg pointer field.
202 Most hosts use the older BSD interpretation, so if you turn this on
203 Linux might not communicate correctly with them.
206 tcp_max_syn_backlog - INTEGER
207 Maximal number of remembered connection requests, which are
208 still did not receive an acknowledgment from connecting client.
209 Default value is 1024 for systems with more than 128Mb of memory,
210 and 128 for low memory machines. If server suffers of overload,
211 try to increase this number.
213 tcp_window_scaling - BOOLEAN
214 Enable window scaling as defined in RFC1323.
216 tcp_timestamps - BOOLEAN
217 Enable timestamps as defined in RFC1323.
220 Enable select acknowledgments (SACKS).
223 Enable FACK congestion avoidance and fast retransmission.
224 The value is not used, if tcp_sack is not enabled.
227 Allows TCP to send "duplicate" SACKs.
230 Enable Explicit Congestion Notification in TCP.
232 tcp_reordering - INTEGER
233 Maximal reordering of packets in a TCP stream.
236 tcp_retrans_collapse - BOOLEAN
237 Bug-to-bug compatibility with some broken printers.
238 On retransmit try to send bigger packets to work around bugs in
241 tcp_wmem - vector of 3 INTEGERs: min, default, max
242 min: Amount of memory reserved for send buffers for TCP socket.
243 Each TCP socket has rights to use it due to fact of its birth.
246 default: Amount of memory allowed for send buffers for TCP socket
247 by default. This value overrides net.core.wmem_default used
248 by other protocols, it is usually lower than net.core.wmem_default.
251 max: Maximal amount of memory allowed for automatically selected
252 send buffers for TCP socket. This value does not override
253 net.core.wmem_max, "static" selection via SO_SNDBUF does not use this.
256 tcp_rmem - vector of 3 INTEGERs: min, default, max
257 min: Minimal size of receive buffer used by TCP sockets.
258 It is guaranteed to each TCP socket, even under moderate memory
262 default: default size of receive buffer used by TCP sockets.
263 This value overrides net.core.rmem_default used by other protocols.
264 Default: 87380 bytes. This value results in window of 65535 with
265 default setting of tcp_adv_win_scale and tcp_app_win:0 and a bit
266 less for default tcp_app_win. See below about these variables.
268 max: maximal size of receive buffer allowed for automatically
269 selected receiver buffers for TCP socket. This value does not override
270 net.core.rmem_max, "static" selection via SO_RCVBUF does not use this.
271 Default: 87380*2 bytes.
273 tcp_mem - vector of 3 INTEGERs: min, pressure, max
274 low: below this number of pages TCP is not bothered about its
277 pressure: when amount of memory allocated by TCP exceeds this number
278 of pages, TCP moderates its memory consumption and enters memory
279 pressure mode, which is exited when memory consumption falls
282 high: number of pages allowed for queueing by all TCP sockets.
284 Defaults are calculated at boot time from amount of available
287 tcp_app_win - INTEGER
288 Reserve max(window/2^tcp_app_win, mss) of window for application
289 buffer. Value 0 is special, it means that nothing is reserved.
292 tcp_adv_win_scale - INTEGER
293 Count buffering overhead as bytes/2^tcp_adv_win_scale
294 (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale),
298 tcp_rfc1337 - BOOLEAN
299 If set, the TCP stack behaves conforming to RFC1337. If unset,
300 we are not conforming to RFC, but prevent TCP TIME_WAIT
304 tcp_low_latency - BOOLEAN
305 If set, the TCP stack makes decisions that prefer lower
306 latency as opposed to higher throughput. By default, this
307 option is not set meaning that higher throughput is preferred.
308 An example of an application where this default should be
309 changed would be a Beowulf compute cluster.
312 tcp_tso_win_divisor - INTEGER
313 This allows control over what percentage of the congestion window
314 can be consumed by a single TSO frame.
315 The setting of this parameter is a choice between burstiness and
316 building larger TSO frames.
320 Enables F-RTO, an enhanced recovery algorithm for TCP retransmission
321 timeouts. It is particularly beneficial in wireless environments
322 where packet loss is typically due to random radio interference
323 rather than intermediate router congestion.
325 tcp_congestion_control - STRING
326 Set the congestion control algorithm to be used for new
327 connections. The algorithm "reno" is always available, but
328 additional choices may be available based on kernel configuration.
331 Limit of socket listen() backlog, known in userspace as SOMAXCONN.
332 Defaults to 128. See also tcp_max_syn_backlog for additional tuning
337 ip_local_port_range - 2 INTEGERS
338 Defines the local port range that is used by TCP and UDP to
339 choose the local port. The first number is the first, the
340 second the last local port number. Default value depends on
341 amount of memory available on the system:
343 < 128Mb 1024-4999 or even less.
344 This number defines number of active connections, which this
345 system can issue simultaneously to systems not supporting
346 TCP extensions (timestamps). With tcp_tw_recycle enabled
347 (i.e. by default) range 1024-4999 is enough to issue up to
348 2000 connections per second to systems supporting timestamps.
350 ip_nonlocal_bind - BOOLEAN
351 If set, allows processes to bind() to non-local IP addresses,
352 which can be quite useful - but may break some applications.
356 If set non-zero, enables support for dynamic addresses.
357 If set to a non-zero value larger than 1, a kernel log
358 message will be printed when dynamic address rewriting
362 icmp_echo_ignore_all - BOOLEAN
363 If set non-zero, then the kernel will ignore all ICMP ECHO
367 icmp_echo_ignore_broadcasts - BOOLEAN
368 If set non-zero, then the kernel will ignore all ICMP ECHO and
369 TIMESTAMP requests sent to it via broadcast/multicast.
372 icmp_ratelimit - INTEGER
373 Limit the maximal rates for sending ICMP packets whose type matches
374 icmp_ratemask (see below) to specific targets.
375 0 to disable any limiting, otherwise the maximal rate in jiffies(1)
378 icmp_ratemask - INTEGER
379 Mask made of ICMP types for which rates are being limited.
380 Significant bits: IHGFEDCBA9876543210
381 Default mask: 0000001100000011000 (6168)
383 Bit definitions (see include/linux/icmp.h):
385 3 Destination Unreachable *
390 C Parameter Problem *
395 H Address Mask Request
398 * These are rate limited by default (see default mask above)
400 icmp_ignore_bogus_error_responses - BOOLEAN
401 Some routers violate RFC1122 by sending bogus responses to broadcast
402 frames. Such violations are normally logged via a kernel warning.
403 If this is set to TRUE, the kernel will not give such warnings, which
404 will avoid log file clutter.
407 igmp_max_memberships - INTEGER
408 Change the maximum number of multicast groups we can subscribe to.
411 conf/interface/* changes special settings per interface (where "interface" is
412 the name of your network interface)
413 conf/all/* is special, changes the settings for all interfaces
416 log_martians - BOOLEAN
417 Log packets with impossible addresses to kernel log.
418 log_martians for the interface will be enabled if at least one of
419 conf/{all,interface}/log_martians is set to TRUE,
420 it will be disabled otherwise
422 accept_redirects - BOOLEAN
423 Accept ICMP redirect messages.
424 accept_redirects for the interface will be enabled if:
425 - both conf/{all,interface}/accept_redirects are TRUE in the case forwarding
426 for the interface is enabled
428 - at least one of conf/{all,interface}/accept_redirects is TRUE in the case
429 forwarding for the interface is disabled
430 accept_redirects for the interface will be disabled otherwise
435 Enable IP forwarding on this interface.
437 mc_forwarding - BOOLEAN
438 Do multicast routing. The kernel needs to be compiled with CONFIG_MROUTE
439 and a multicast routing daemon is required.
440 conf/all/mc_forwarding must also be set to TRUE to enable multicast routing
444 Integer value used to differentiate the devices by the medium they
445 are attached to. Two devices can have different id values when
446 the broadcast packets are received only on one of them.
447 The default value 0 means that the device is the only interface
448 to its medium, value of -1 means that medium is not known.
450 Currently, it is used to change the proxy_arp behavior:
451 the proxy_arp feature is enabled for packets forwarded between
452 two devices attached to different media.
456 proxy_arp for the interface will be enabled if at least one of
457 conf/{all,interface}/proxy_arp is set to TRUE,
458 it will be disabled otherwise
460 shared_media - BOOLEAN
461 Send(router) or accept(host) RFC1620 shared media redirects.
462 Overrides ip_secure_redirects.
463 shared_media for the interface will be enabled if at least one of
464 conf/{all,interface}/shared_media is set to TRUE,
465 it will be disabled otherwise
468 secure_redirects - BOOLEAN
469 Accept ICMP redirect messages only for gateways,
470 listed in default gateway list.
471 secure_redirects for the interface will be enabled if at least one of
472 conf/{all,interface}/secure_redirects is set to TRUE,
473 it will be disabled otherwise
476 send_redirects - BOOLEAN
477 Send redirects, if router.
478 send_redirects for the interface will be enabled if at least one of
479 conf/{all,interface}/send_redirects is set to TRUE,
480 it will be disabled otherwise
483 bootp_relay - BOOLEAN
484 Accept packets with source address 0.b.c.d destined
485 not to this host as local ones. It is supposed, that
486 BOOTP relay daemon will catch and forward such packets.
487 conf/all/bootp_relay must also be set to TRUE to enable BOOTP relay
492 accept_source_route - BOOLEAN
493 Accept packets with SRR option.
494 conf/all/accept_source_route must also be set to TRUE to accept packets
495 with SRR option on the interface
496 default TRUE (router)
500 1 - do source validation by reversed path, as specified in RFC1812
501 Recommended option for single homed hosts and stub network
502 routers. Could cause troubles for complicated (not loop free)
503 networks running a slow unreliable protocol (sort of RIP),
504 or using static routes.
506 0 - No source validation.
508 conf/all/rp_filter must also be set to TRUE to do source validation
511 Default value is 0. Note that some distributions enable it
515 1 - Allows you to have multiple network interfaces on the same
516 subnet, and have the ARPs for each interface be answered
517 based on whether or not the kernel would route a packet from
518 the ARP'd IP out that interface (therefore you must use source
519 based routing for this to work). In other words it allows control
520 of which cards (usually 1) will respond to an arp request.
522 0 - (default) The kernel can respond to arp requests with addresses
523 from other interfaces. This may seem wrong but it usually makes
524 sense, because it increases the chance of successful communication.
525 IP addresses are owned by the complete host on Linux, not by
526 particular interfaces. Only for more complex setups like load-
527 balancing, does this behaviour cause problems.
529 arp_filter for the interface will be enabled if at least one of
530 conf/{all,interface}/arp_filter is set to TRUE,
531 it will be disabled otherwise
533 arp_announce - INTEGER
534 Define different restriction levels for announcing the local
535 source IP address from IP packets in ARP requests sent on
537 0 - (default) Use any local address, configured on any interface
538 1 - Try to avoid local addresses that are not in the target's
539 subnet for this interface. This mode is useful when target
540 hosts reachable via this interface require the source IP
541 address in ARP requests to be part of their logical network
542 configured on the receiving interface. When we generate the
543 request we will check all our subnets that include the
544 target IP and will preserve the source address if it is from
545 such subnet. If there is no such subnet we select source
546 address according to the rules for level 2.
547 2 - Always use the best local address for this target.
548 In this mode we ignore the source address in the IP packet
549 and try to select local address that we prefer for talks with
550 the target host. Such local address is selected by looking
551 for primary IP addresses on all our subnets on the outgoing
552 interface that include the target IP address. If no suitable
553 local address is found we select the first local address
554 we have on the outgoing interface or on all other interfaces,
555 with the hope we will receive reply for our request and
556 even sometimes no matter the source IP address we announce.
558 The max value from conf/{all,interface}/arp_announce is used.
560 Increasing the restriction level gives more chance for
561 receiving answer from the resolved target while decreasing
562 the level announces more valid sender's information.
565 Define different modes for sending replies in response to
566 received ARP requests that resolve local target IP addresses:
567 0 - (default): reply for any local target IP address, configured
569 1 - reply only if the target IP address is local address
570 configured on the incoming interface
571 2 - reply only if the target IP address is local address
572 configured on the incoming interface and both with the
573 sender's IP address are part from same subnet on this interface
574 3 - do not reply for local addresses configured with scope host,
575 only resolutions for global and link addresses are replied
577 8 - do not reply for all local addresses
579 The max value from conf/{all,interface}/arp_ignore is used
580 when ARP request is received on the {interface}
582 app_solicit - INTEGER
583 The maximum number of probes to send to the user space ARP daemon
584 via netlink before dropping back to multicast probes (see
585 mcast_solicit). Defaults to 0.
587 disable_policy - BOOLEAN
588 Disable IPSEC policy (SPD) for this interface
590 disable_xfrm - BOOLEAN
591 Disable IPSEC encryption on this interface, whatever the policy
596 Allows you to write a number, which can be used as required.
599 (1) Jiffie: internal timeunit for the kernel. On the i386 1/100s, on the
600 Alpha 1/1024s. See the HZ define in /usr/include/asm/param.h for the exact
601 value on your system.
610 delon.nicolas@wanadoo.fr
615 /proc/sys/net/ipv6/* Variables:
617 IPv6 has no global variables such as tcp_*. tcp_* settings under ipv4/ also
618 apply to IPv6 [XXX?].
621 Default value for IPV6_V6ONLY socket option,
622 which restricts use of the IPv6 socket to IPv6 communication
624 TRUE: disable IPv4-mapped address feature
625 FALSE: enable IPv4-mapped address feature
627 Default: FALSE (as specified in RFC2553bis)
631 ip6frag_high_thresh - INTEGER
632 Maximum memory used to reassemble IPv6 fragments. When
633 ip6frag_high_thresh bytes of memory is allocated for this purpose,
634 the fragment handler will toss packets until ip6frag_low_thresh
637 ip6frag_low_thresh - INTEGER
638 See ip6frag_high_thresh
640 ip6frag_time - INTEGER
641 Time in seconds to keep an IPv6 fragment in memory.
643 ip6frag_secret_interval - INTEGER
644 Regeneration interval (in seconds) of the hash secret (or lifetime
645 for the hash secret) for IPv6 fragments.
649 Change the interface-specific default settings.
653 Change all the interface-specific settings.
655 [XXX: Other special features than forwarding?]
657 conf/all/forwarding - BOOLEAN
658 Enable global IPv6 forwarding between all interfaces.
660 IPv4 and IPv6 work differently here; e.g. netfilter must be used
661 to control which interfaces may forward packets and which not.
663 This also sets all interfaces' Host/Router setting
664 'forwarding' to the specified value. See below for details.
666 This referred to as global forwarding.
669 Change special settings per interface.
671 The functional behaviour for certain settings is different
672 depending on whether local forwarding is enabled or not.
675 Accept Router Advertisements; autoconfigure using them.
677 Functional default: enabled if local forwarding is disabled.
678 disabled if local forwarding is enabled.
680 accept_redirects - BOOLEAN
683 Functional default: enabled if local forwarding is disabled.
684 disabled if local forwarding is enabled.
687 Autoconfigure addresses using Prefix Information in Router
690 Functional default: enabled if accept_ra is enabled.
691 disabled if accept_ra is disabled.
693 dad_transmits - INTEGER
694 The amount of Duplicate Address Detection probes to send.
698 Configure interface-specific Host/Router behaviour.
700 Note: It is recommended to have the same setting on all
701 interfaces; mixed router/host scenarios are rather uncommon.
705 By default, Host behaviour is assumed. This means:
707 1. IsRouter flag is not set in Neighbour Advertisements.
708 2. Router Solicitations are being sent when necessary.
709 3. If accept_ra is TRUE (default), accept Router
710 Advertisements (and do autoconfiguration).
711 4. If accept_redirects is TRUE (default), accept Redirects.
715 If local forwarding is enabled, Router behaviour is assumed.
716 This means exactly the reverse from the above:
718 1. IsRouter flag is set in Neighbour Advertisements.
719 2. Router Solicitations are not sent.
720 3. Router Advertisements are ignored.
721 4. Redirects are ignored.
723 Default: FALSE if global forwarding is disabled (default),
727 Default Hop Limit to set.
731 Default Maximum Transfer Unit
732 Default: 1280 (IPv6 required minimum)
734 router_solicitation_delay - INTEGER
735 Number of seconds to wait after interface is brought up
736 before sending Router Solicitations.
739 router_solicitation_interval - INTEGER
740 Number of seconds to wait between Router Solicitations.
743 router_solicitations - INTEGER
744 Number of Router Solicitations to send until assuming no
748 use_tempaddr - INTEGER
749 Preference for Privacy Extensions (RFC3041).
750 <= 0 : disable Privacy Extensions
751 == 1 : enable Privacy Extensions, but prefer public
752 addresses over temporary addresses.
753 > 1 : enable Privacy Extensions and prefer temporary
754 addresses over public addresses.
755 Default: 0 (for most devices)
756 -1 (for point-to-point devices and loopback devices)
758 temp_valid_lft - INTEGER
759 valid lifetime (in seconds) for temporary addresses.
760 Default: 604800 (7 days)
762 temp_prefered_lft - INTEGER
763 Preferred lifetime (in seconds) for temporary addresses.
764 Default: 86400 (1 day)
766 max_desync_factor - INTEGER
767 Maximum value for DESYNC_FACTOR, which is a random value
768 that ensures that clients don't synchronize with each
769 other and generate new addresses at exactly the same time.
773 regen_max_retry - INTEGER
774 Number of attempts before give up attempting to generate
775 valid temporary addresses.
778 max_addresses - INTEGER
779 Number of maximum addresses per interface. 0 disables limitation.
780 It is recommended not set too large value (or 0) because it would
781 be too easy way to crash kernel to allow to create too much of
782 autoconfigured addresses.
787 Limit the maximal rates for sending ICMPv6 packets.
788 0 to disable any limiting, otherwise the maximal rate in jiffies(1)
793 Pekka Savola <pekkas@netcore.fi>
794 YOSHIFUJI Hideaki / USAGI Project <yoshfuji@linux-ipv6.org>
797 /proc/sys/net/bridge/* Variables:
799 bridge-nf-call-arptables - BOOLEAN
800 1 : pass bridged ARP traffic to arptables' FORWARD chain.
804 bridge-nf-call-iptables - BOOLEAN
805 1 : pass bridged IPv4 traffic to iptables' chains.
809 bridge-nf-call-ip6tables - BOOLEAN
810 1 : pass bridged IPv6 traffic to ip6tables' chains.
814 bridge-nf-filter-vlan-tagged - BOOLEAN
815 1 : pass bridged vlan-tagged ARP/IP traffic to arptables/iptables.
823 discovery_slots FIXME
824 discovery_timeout FIXME
825 fast_poll_increase FIXME
826 ip6_queue_maxlen FIXME
827 lap_keepalive_time FIXME
831 max_noreply_time FIXME
832 max_tx_data_size FIXME
834 min_tx_turn_time FIXME
839 warn_noreply_time FIXME
841 $Id: ip-sysctl.txt,v 1.20 2001/12/13 09:00:18 davem Exp $