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.
22 ipfrag_high_thresh - INTEGER
23 Maximum memory used to reassemble IP fragments. When
24 ipfrag_high_thresh bytes of memory is allocated for this purpose,
25 the fragment handler will toss packets until ipfrag_low_thresh
28 ipfrag_low_thresh - INTEGER
29 See ipfrag_high_thresh
32 Time in seconds to keep an IP fragment in memory.
34 ipfrag_secret_interval - INTEGER
35 Regeneration interval (in seconds) of the hash secret (or lifetime
36 for the hash secret) for IP fragments.
41 inet_peer_threshold - INTEGER
42 The approximate size of the storage. Starting from this threshold
43 entries will be thrown aggressively. This threshold also determines
44 entries' time-to-live and time intervals between garbage collection
45 passes. More entries, less time-to-live, less GC interval.
47 inet_peer_minttl - INTEGER
48 Minimum time-to-live of entries. Should be enough to cover fragment
49 time-to-live on the reassembling side. This minimum time-to-live is
50 guaranteed if the pool size is less than inet_peer_threshold.
51 Measured in jiffies(1).
53 inet_peer_maxttl - INTEGER
54 Maximum time-to-live of entries. Unused entries will expire after
55 this period of time if there is no memory pressure on the pool (i.e.
56 when the number of entries in the pool is very small).
57 Measured in jiffies(1).
59 inet_peer_gc_mintime - INTEGER
60 Minimum interval between garbage collection passes. This interval is
61 in effect under high memory pressure on the pool.
62 Measured in jiffies(1).
64 inet_peer_gc_maxtime - INTEGER
65 Minimum interval between garbage collection passes. This interval is
66 in effect under low (or absent) memory pressure on the pool.
67 Measured in jiffies(1).
71 tcp_syn_retries - INTEGER
72 Number of times initial SYNs for an active TCP connection attempt
73 will be retransmitted. Should not be higher than 255. Default value
74 is 5, which corresponds to ~180seconds.
76 tcp_synack_retries - INTEGER
77 Number of times SYNACKs for a passive TCP connection attempt will
78 be retransmitted. Should not be higher than 255. Default value
79 is 5, which corresponds to ~180seconds.
81 tcp_keepalive_time - INTEGER
82 How often TCP sends out keepalive messages when keepalive is enabled.
85 tcp_keepalive_probes - INTEGER
86 How many keepalive probes TCP sends out, until it decides that the
87 connection is broken. Default value: 9.
89 tcp_keepalive_intvl - INTEGER
90 How frequently the probes are send out. Multiplied by
91 tcp_keepalive_probes it is time to kill not responding connection,
92 after probes started. Default value: 75sec i.e. connection
93 will be aborted after ~11 minutes of retries.
95 tcp_retries1 - INTEGER
96 How many times to retry before deciding that something is wrong
97 and it is necessary to report this suspicion to network layer.
98 Minimal RFC value is 3, it is default, which corresponds
99 to ~3sec-8min depending on RTO.
101 tcp_retries2 - INTEGER
102 How may times to retry before killing alive TCP connection.
103 RFC1122 says that the limit should be longer than 100 sec.
104 It is too small number. Default value 15 corresponds to ~13-30min
107 tcp_orphan_retries - INTEGER
108 How may times to retry before killing TCP connection, closed
109 by our side. Default value 7 corresponds to ~50sec-16min
110 depending on RTO. If you machine is loaded WEB server,
111 you should think about lowering this value, such sockets
112 may consume significant resources. Cf. tcp_max_orphans.
114 tcp_fin_timeout - INTEGER
115 Time to hold socket in state FIN-WAIT-2, if it was closed
116 by our side. Peer can be broken and never close its side,
117 or even died unexpectedly. Default value is 60sec.
118 Usual value used in 2.2 was 180 seconds, you may restore
119 it, but remember that if your machine is even underloaded WEB server,
120 you risk to overflow memory with kilotons of dead sockets,
121 FIN-WAIT-2 sockets are less dangerous than FIN-WAIT-1,
122 because they eat maximum 1.5K of memory, but they tend
123 to live longer. Cf. tcp_max_orphans.
125 tcp_max_tw_buckets - INTEGER
126 Maximal number of timewait sockets held by system simultaneously.
127 If this number is exceeded time-wait socket is immediately destroyed
128 and warning is printed. This limit exists only to prevent
129 simple DoS attacks, you _must_ not lower the limit artificially,
130 but rather increase it (probably, after increasing installed memory),
131 if network conditions require more than default value.
133 tcp_tw_recycle - BOOLEAN
134 Enable fast recycling TIME-WAIT sockets. Default value is 0.
135 It should not be changed without advice/request of technical
138 tcp_tw_reuse - BOOLEAN
139 Allow to reuse TIME-WAIT sockets for new connections when it is
140 safe from protocol viewpoint. Default value is 0.
141 It should not be changed without advice/request of technical
144 tcp_max_orphans - INTEGER
145 Maximal number of TCP sockets not attached to any user file handle,
146 held by system. If this number is exceeded orphaned connections are
147 reset immediately and warning is printed. This limit exists
148 only to prevent simple DoS attacks, you _must_ not rely on this
149 or lower the limit artificially, but rather increase it
150 (probably, after increasing installed memory),
151 if network conditions require more than default value,
152 and tune network services to linger and kill such states
153 more aggressively. Let me to remind again: each orphan eats
154 up to ~64K of unswappable memory.
156 tcp_abort_on_overflow - BOOLEAN
157 If listening service is too slow to accept new connections,
158 reset them. Default state is FALSE. It means that if overflow
159 occurred due to a burst, connection will recover. Enable this
160 option _only_ if you are really sure that listening daemon
161 cannot be tuned to accept connections faster. Enabling this
162 option can harm clients of your server.
164 tcp_syncookies - BOOLEAN
165 Only valid when the kernel was compiled with CONFIG_SYNCOOKIES
166 Send out syncookies when the syn backlog queue of a socket
167 overflows. This is to prevent against the common 'syn flood attack'
170 Note, that syncookies is fallback facility.
171 It MUST NOT be used to help highly loaded servers to stand
172 against legal connection rate. If you see synflood warnings
173 in your logs, but investigation shows that they occur
174 because of overload with legal connections, you should tune
175 another parameters until this warning disappear.
176 See: tcp_max_syn_backlog, tcp_synack_retries, tcp_abort_on_overflow.
178 syncookies seriously violate TCP protocol, do not allow
179 to use TCP extensions, can result in serious degradation
180 of some services (f.e. SMTP relaying), visible not by you,
181 but your clients and relays, contacting you. While you see
182 synflood warnings in logs not being really flooded, your server
183 is seriously misconfigured.
186 Use the Host requirements interpretation of the TCP urg pointer field.
187 Most hosts use the older BSD interpretation, so if you turn this on
188 Linux might not communicate correctly with them.
191 tcp_max_syn_backlog - INTEGER
192 Maximal number of remembered connection requests, which are
193 still did not receive an acknowledgment from connecting client.
194 Default value is 1024 for systems with more than 128Mb of memory,
195 and 128 for low memory machines. If server suffers of overload,
196 try to increase this number.
198 tcp_window_scaling - BOOLEAN
199 Enable window scaling as defined in RFC1323.
201 tcp_timestamps - BOOLEAN
202 Enable timestamps as defined in RFC1323.
205 Enable select acknowledgments (SACKS).
208 Enable FACK congestion avoidance and fast retransmission.
209 The value is not used, if tcp_sack is not enabled.
212 Allows TCP to send "duplicate" SACKs.
215 Enable Explicit Congestion Notification in TCP.
217 tcp_reordering - INTEGER
218 Maximal reordering of packets in a TCP stream.
221 tcp_retrans_collapse - BOOLEAN
222 Bug-to-bug compatibility with some broken printers.
223 On retransmit try to send bigger packets to work around bugs in
226 tcp_wmem - vector of 3 INTEGERs: min, default, max
227 min: Amount of memory reserved for send buffers for TCP socket.
228 Each TCP socket has rights to use it due to fact of its birth.
231 default: Amount of memory allowed for send buffers for TCP socket
232 by default. This value overrides net.core.wmem_default used
233 by other protocols, it is usually lower than net.core.wmem_default.
236 max: Maximal amount of memory allowed for automatically selected
237 send buffers for TCP socket. This value does not override
238 net.core.wmem_max, "static" selection via SO_SNDBUF does not use this.
241 tcp_rmem - vector of 3 INTEGERs: min, default, max
242 min: Minimal size of receive buffer used by TCP sockets.
243 It is guaranteed to each TCP socket, even under moderate memory
247 default: default size of receive buffer used by TCP sockets.
248 This value overrides net.core.rmem_default used by other protocols.
249 Default: 87380 bytes. This value results in window of 65535 with
250 default setting of tcp_adv_win_scale and tcp_app_win:0 and a bit
251 less for default tcp_app_win. See below about these variables.
253 max: maximal size of receive buffer allowed for automatically
254 selected receiver buffers for TCP socket. This value does not override
255 net.core.rmem_max, "static" selection via SO_RCVBUF does not use this.
256 Default: 87380*2 bytes.
258 tcp_mem - vector of 3 INTEGERs: min, pressure, max
259 low: below this number of pages TCP is not bothered about its
262 pressure: when amount of memory allocated by TCP exceeds this number
263 of pages, TCP moderates its memory consumption and enters memory
264 pressure mode, which is exited when memory consumption falls
267 high: number of pages allowed for queueing by all TCP sockets.
269 Defaults are calculated at boot time from amount of available
272 tcp_app_win - INTEGER
273 Reserve max(window/2^tcp_app_win, mss) of window for application
274 buffer. Value 0 is special, it means that nothing is reserved.
277 tcp_adv_win_scale - INTEGER
278 Count buffering overhead as bytes/2^tcp_adv_win_scale
279 (if tcp_adv_win_scale > 0) or bytes-bytes/2^(-tcp_adv_win_scale),
283 tcp_rfc1337 - BOOLEAN
284 If set, the TCP stack behaves conforming to RFC1337. If unset,
285 we are not conforming to RFC, but prevent TCP TIME_WAIT
289 tcp_low_latency - BOOLEAN
290 If set, the TCP stack makes decisions that prefer lower
291 latency as opposed to higher throughput. By default, this
292 option is not set meaning that higher throughput is preferred.
293 An example of an application where this default should be
294 changed would be a Beowulf compute cluster.
297 tcp_westwood - BOOLEAN
298 Enable TCP Westwood+ congestion control algorithm.
299 TCP Westwood+ is a sender-side only modification of the TCP Reno
300 protocol stack that optimizes the performance of TCP congestion
301 control. It is based on end-to-end bandwidth estimation to set
302 congestion window and slow start threshold after a congestion
303 episode. Using this estimation, TCP Westwood+ adaptively sets a
304 slow start threshold and a congestion window which takes into
305 account the bandwidth used at the time congestion is experienced.
306 TCP Westwood+ significantly increases fairness wrt TCP Reno in
307 wired networks and throughput over wireless links.
310 tcp_vegas_cong_avoid - BOOLEAN
311 Enable TCP Vegas congestion avoidance algorithm.
312 TCP Vegas is a sender-side only change to TCP that anticipates
313 the onset of congestion by estimating the bandwidth. TCP Vegas
314 adjusts the sending rate by modifying the congestion
315 window. TCP Vegas should provide less packet loss, but it is
316 not as aggressive as TCP Reno.
320 Enable BIC TCP congestion control algorithm.
321 BIC-TCP is a sender-side only change that ensures a linear RTT
322 fairness under large windows while offering both scalability and
323 bounded TCP-friendliness. The protocol combines two schemes
324 called additive increase and binary search increase. When the
325 congestion window is large, additive increase with a large
326 increment ensures linear RTT fairness as well as good
327 scalability. Under small congestion windows, binary search
328 increase provides TCP friendliness.
331 tcp_bic_low_window - INTEGER
332 Sets the threshold window (in packets) where BIC TCP starts to
333 adjust the congestion window. Below this threshold BIC TCP behaves
334 the same as the default TCP Reno.
337 tcp_bic_fast_convergence - BOOLEAN
338 Forces BIC TCP to more quickly respond to changes in congestion
339 window. Allows two flows sharing the same connection to converge
343 ip_local_port_range - 2 INTEGERS
344 Defines the local port range that is used by TCP and UDP to
345 choose the local port. The first number is the first, the
346 second the last local port number. Default value depends on
347 amount of memory available on the system:
349 < 128Mb 1024-4999 or even less.
350 This number defines number of active connections, which this
351 system can issue simultaneously to systems not supporting
352 TCP extensions (timestamps). With tcp_tw_recycle enabled
353 (i.e. by default) range 1024-4999 is enough to issue up to
354 2000 connections per second to systems supporting timestamps.
356 ip_nonlocal_bind - BOOLEAN
357 If set, allows processes to bind() to non-local IP addresses,
358 which can be quite useful - but may break some applications.
362 If set non-zero, enables support for dynamic addresses.
363 If set to a non-zero value larger than 1, a kernel log
364 message will be printed when dynamic address rewriting
368 icmp_echo_ignore_all - BOOLEAN
369 icmp_echo_ignore_broadcasts - BOOLEAN
370 If either is set to true, then the kernel will ignore either all
371 ICMP ECHO requests sent to it or just those to broadcast/multicast
372 addresses, respectively.
374 icmp_ratelimit - INTEGER
375 Limit the maximal rates for sending ICMP packets whose type matches
376 icmp_ratemask (see below) to specific targets.
377 0 to disable any limiting, otherwise the maximal rate in jiffies(1)
380 icmp_ratemask - INTEGER
381 Mask made of ICMP types for which rates are being limited.
382 Significant bits: IHGFEDCBA9876543210
383 Default mask: 0000001100000011000 (6168)
385 Bit definitions (see include/linux/icmp.h):
387 3 Destination Unreachable *
392 C Parameter Problem *
397 H Address Mask Request
400 * These are rate limited by default (see default mask above)
402 icmp_ignore_bogus_error_responses - BOOLEAN
403 Some routers violate RFC1122 by sending bogus responses to broadcast
404 frames. Such violations are normally logged via a kernel warning.
405 If this is set to TRUE, the kernel will not give such warnings, which
406 will avoid log file clutter.
409 igmp_max_memberships - INTEGER
410 Change the maximum number of multicast groups we can subscribe to.
413 conf/interface/* changes special settings per interface (where "interface" is
414 the name of your network interface)
415 conf/all/* is special, changes the settings for all interfaces
418 log_martians - BOOLEAN
419 Log packets with impossible addresses to kernel log.
420 log_martians for the interface will be enabled if at least one of
421 conf/{all,interface}/log_martians is set to TRUE,
422 it will be disabled otherwise
424 accept_redirects - BOOLEAN
425 Accept ICMP redirect messages.
426 accept_redirects for the interface will be enabled if:
427 - both conf/{all,interface}/accept_redirects are TRUE in the case forwarding
428 for the interface is enabled
430 - at least one of conf/{all,interface}/accept_redirects is TRUE in the case
431 forwarding for the interface is disabled
432 accept_redirects for the interface will be disabled otherwise
437 Enable IP forwarding on this interface.
439 mc_forwarding - BOOLEAN
440 Do multicast routing. The kernel needs to be compiled with CONFIG_MROUTE
441 and a multicast routing daemon is required.
442 conf/all/mc_forwarding must also be set to TRUE to enable multicast routing
446 Integer value used to differentiate the devices by the medium they
447 are attached to. Two devices can have different id values when
448 the broadcast packets are received only on one of them.
449 The default value 0 means that the device is the only interface
450 to its medium, value of -1 means that medium is not known.
452 Currently, it is used to change the proxy_arp behavior:
453 the proxy_arp feature is enabled for packets forwarded between
454 two devices attached to different media.
458 proxy_arp for the interface will be enabled if at least one of
459 conf/{all,interface}/proxy_arp is set to TRUE,
460 it will be disabled otherwise
462 shared_media - BOOLEAN
463 Send(router) or accept(host) RFC1620 shared media redirects.
464 Overrides ip_secure_redirects.
465 shared_media for the interface will be enabled if at least one of
466 conf/{all,interface}/shared_media is set to TRUE,
467 it will be disabled otherwise
470 secure_redirects - BOOLEAN
471 Accept ICMP redirect messages only for gateways,
472 listed in default gateway list.
473 secure_redirects for the interface will be enabled if at least one of
474 conf/{all,interface}/secure_redirects is set to TRUE,
475 it will be disabled otherwise
478 send_redirects - BOOLEAN
479 Send redirects, if router.
480 send_redirects for the interface will be enabled if at least one of
481 conf/{all,interface}/send_redirects is set to TRUE,
482 it will be disabled otherwise
485 bootp_relay - BOOLEAN
486 Accept packets with source address 0.b.c.d destined
487 not to this host as local ones. It is supposed, that
488 BOOTP relay daemon will catch and forward such packets.
489 conf/all/bootp_relay must also be set to TRUE to enable BOOTP relay
494 accept_source_route - BOOLEAN
495 Accept packets with SRR option.
496 conf/all/accept_source_route must also be set to TRUE to accept packets
497 with SRR option on the interface
498 default TRUE (router)
502 1 - do source validation by reversed path, as specified in RFC1812
503 Recommended option for single homed hosts and stub network
504 routers. Could cause troubles for complicated (not loop free)
505 networks running a slow unreliable protocol (sort of RIP),
506 or using static routes.
508 0 - No source validation.
510 conf/all/rp_filter must also be set to TRUE to do source validation
513 Default value is 0. Note that some distributions enable it
517 1 - Allows you to have multiple network interfaces on the same
518 subnet, and have the ARPs for each interface be answered
519 based on whether or not the kernel would route a packet from
520 the ARP'd IP out that interface (therefore you must use source
521 based routing for this to work). In other words it allows control
522 of which cards (usually 1) will respond to an arp request.
524 0 - (default) The kernel can respond to arp requests with addresses
525 from other interfaces. This may seem wrong but it usually makes
526 sense, because it increases the chance of successful communication.
527 IP addresses are owned by the complete host on Linux, not by
528 particular interfaces. Only for more complex setups like load-
529 balancing, does this behaviour cause problems.
531 arp_filter for the interface will be enabled if at least one of
532 conf/{all,interface}/arp_filter is set to TRUE,
533 it will be disabled otherwise
535 arp_announce - INTEGER
536 Define different restriction levels for announcing the local
537 source IP address from IP packets in ARP requests sent on
539 0 - (default) Use any local address, configured on any interface
540 1 - Try to avoid local addresses that are not in the target's
541 subnet for this interface. This mode is useful when target
542 hosts reachable via this interface require the source IP
543 address in ARP requests to be part of their logical network
544 configured on the receiving interface. When we generate the
545 request we will check all our subnets that include the
546 target IP and will preserve the source address if it is from
547 such subnet. If there is no such subnet we select source
548 address according to the rules for level 2.
549 2 - Always use the best local address for this target.
550 In this mode we ignore the source address in the IP packet
551 and try to select local address that we prefer for talks with
552 the target host. Such local address is selected by looking
553 for primary IP addresses on all our subnets on the outgoing
554 interface that include the target IP address. If no suitable
555 local address is found we select the first local address
556 we have on the outgoing interface or on all other interfaces,
557 with the hope we will receive reply for our request and
558 even sometimes no matter the source IP address we announce.
560 The max value from conf/{all,interface}/arp_announce is used.
562 Increasing the restriction level gives more chance for
563 receiving answer from the resolved target while decreasing
564 the level announces more valid sender's information.
567 Define different modes for sending replies in response to
568 received ARP requests that resolve local target IP addresses:
569 0 - (default): reply for any local target IP address, configured
571 1 - reply only if the target IP address is local address
572 configured on the incoming interface
573 2 - reply only if the target IP address is local address
574 configured on the incoming interface and both with the
575 sender's IP address are part from same subnet on this interface
576 3 - do not reply for local addresses configured with scope host,
577 only resolutions for global and link addresses are replied
579 8 - do not reply for all local addresses
581 The max value from conf/{all,interface}/arp_ignore is used
582 when ARP request is received on the {interface}
585 Allows you to write a number, which can be used as required.
588 (1) Jiffie: internal timeunit for the kernel. On the i386 1/100s, on the
589 Alpha 1/1024s. See the HZ define in /usr/include/asm/param.h for the exact
590 value on your system.
599 delon.nicolas@wanadoo.fr
604 /proc/sys/net/ipv6/* Variables:
606 IPv6 has no global variables such as tcp_*. tcp_* settings under ipv4/ also
607 apply to IPv6 [XXX?].
610 Default value for IPV6_V6ONLY socket option,
611 which restricts use of the IPv6 socket to IPv6 communication
613 TRUE: disable IPv4-mapped address feature
614 FALSE: enable IPv4-mapped address feature
616 Default: FALSE (as specified in RFC2553bis)
620 ip6frag_high_thresh - INTEGER
621 Maximum memory used to reassemble IPv6 fragments. When
622 ip6frag_high_thresh bytes of memory is allocated for this purpose,
623 the fragment handler will toss packets until ip6frag_low_thresh
626 ip6frag_low_thresh - INTEGER
627 See ip6frag_high_thresh
629 ip6frag_time - INTEGER
630 Time in seconds to keep an IPv6 fragment in memory.
632 ip6frag_secret_interval - INTEGER
633 Regeneration interval (in seconds) of the hash secret (or lifetime
634 for the hash secret) for IPv6 fragments.
638 Change the interface-specific default settings.
642 Change all the interface-specific settings.
644 [XXX: Other special features than forwarding?]
646 conf/all/forwarding - BOOLEAN
647 Enable global IPv6 forwarding between all interfaces.
649 IPv4 and IPv6 work differently here; e.g. netfilter must be used
650 to control which interfaces may forward packets and which not.
652 This also sets all interfaces' Host/Router setting
653 'forwarding' to the specified value. See below for details.
655 This referred to as global forwarding.
658 Change special settings per interface.
660 The functional behaviour for certain settings is different
661 depending on whether local forwarding is enabled or not.
664 Accept Router Advertisements; autoconfigure using them.
666 Functional default: enabled if local forwarding is disabled.
667 disabled if local forwarding is enabled.
669 accept_redirects - BOOLEAN
672 Functional default: enabled if local forwarding is disabled.
673 disabled if local forwarding is enabled.
676 Configure link-local addresses using L2 hardware addresses.
680 dad_transmits - INTEGER
681 The amount of Duplicate Address Detection probes to send.
685 Configure interface-specific Host/Router behaviour.
687 Note: It is recommended to have the same setting on all
688 interfaces; mixed router/host scenarios are rather uncommon.
692 By default, Host behaviour is assumed. This means:
694 1. IsRouter flag is not set in Neighbour Advertisements.
695 2. Router Solicitations are being sent when necessary.
696 3. If accept_ra is TRUE (default), accept Router
697 Advertisements (and do autoconfiguration).
698 4. If accept_redirects is TRUE (default), accept Redirects.
702 If local forwarding is enabled, Router behaviour is assumed.
703 This means exactly the reverse from the above:
705 1. IsRouter flag is set in Neighbour Advertisements.
706 2. Router Solicitations are not sent.
707 3. Router Advertisements are ignored.
708 4. Redirects are ignored.
710 Default: FALSE if global forwarding is disabled (default),
714 Default Hop Limit to set.
718 Default Maximum Transfer Unit
719 Default: 1280 (IPv6 required minimum)
721 router_solicitation_delay - INTEGER
722 Number of seconds to wait after interface is brought up
723 before sending Router Solicitations.
726 router_solicitation_interval - INTEGER
727 Number of seconds to wait between Router Solicitations.
730 router_solicitations - INTEGER
731 Number of Router Solicitations to send until assuming no
735 use_tempaddr - INTEGER
736 Preference for Privacy Extensions (RFC3041).
737 <= 0 : disable Privacy Extensions
738 == 1 : enable Privacy Extensions, but prefer public
739 addresses over temporary addresses.
740 > 1 : enable Privacy Extensions and prefer temporary
741 addresses over public addresses.
742 Default: 0 (for most devices)
743 -1 (for point-to-point devices and loopback devices)
745 temp_valid_lft - INTEGER
746 valid lifetime (in seconds) for temporary addresses.
747 Default: 604800 (7 days)
749 temp_prefered_lft - INTEGER
750 Preferred lifetime (in seconds) for temporary addresses.
751 Default: 86400 (1 day)
753 max_desync_factor - INTEGER
754 Maximum value for DESYNC_FACTOR, which is a random value
755 that ensures that clients don't synchronize with each
756 other and generate new addresses at exactly the same time.
760 regen_max_retry - INTEGER
761 Number of attempts before give up attempting to generate
762 valid temporary addresses.
765 max_addresses - INTEGER
766 Number of maximum addresses per interface. 0 disables limitation.
767 It is recommended not set too large value (or 0) because it would
768 be too easy way to crash kernel to allow to create too much of
769 autoconfigured addresses.
774 Limit the maximal rates for sending ICMPv6 packets.
775 0 to disable any limiting, otherwise the maximal rate in jiffies(1)
780 Pekka Savola <pekkas@netcore.fi>
781 YOSHIFUJI Hideaki / USAGI Project <yoshfuji@linux-ipv6.org>
784 /proc/sys/net/bridge/* Variables:
786 bridge-nf-call-arptables - BOOLEAN
787 1 : pass bridged ARP traffic to arptables' FORWARD chain.
791 bridge-nf-call-iptables - BOOLEAN
792 1 : pass bridged IPv4 traffic to iptables' chains.
796 bridge-nf-filter-vlan-tagged - BOOLEAN
797 1 : pass bridged vlan-tagged ARP/IP traffic to arptables/iptables.
802 $Id: ip-sysctl.txt,v 1.20 2001/12/13 09:00:18 davem Exp $