199:
can also appear in the gateway column. This indicates that the gateway to reach the corresponding destination subnet is unspecified. This generally means that no intermediate routing hops are necessary because the system is directly connected to the destination.
623:
182:
A way to route a request to a nonexistent target instead of the original target. Often used for adblocking purposes. This can conflict with OS specific behaviour.
172:
The address a host assigns to itself when address request via DHCP has failed, provided the host's IP stack supports this. This usage has been replaced with the
476:
Cable Device
Management Information Base for Data-Over-Cable Service Interface Specification (DOCSIS) Compliant Cable Modems and Cable Modem Termination Systems
266:
In August 2024, researchers from
Israeli cybersecurity firm Oligo announced that a security flaw had been discovered in which malicious requests to the
549:
592:
130:
In both
Windows and Linux, when selecting which of a host's IP address to use as a source IP, a program may specify INADDR_ANY (
308:
46:
578:
Metabase Up and
Running Introduce Business Intelligence and Analytics to Your Company and Make Better Business Decisions
228:. It matches all addresses in the IPv4 address space and is present on most hosts, directed towards a local router.
274:
address of their target, allowing them to access private resources, such as developer code or internal messages.
97:
as its own source address in IP when it has not yet been assigned an address, such as when sending the initial
391:
117:
have attributed special internal meanings to the address. These uses do not result in IPv4 packets containing
511:
If 0.0.0.0, either syslog transmission is inhibited, or the Syslog server address is not an IPv4 address.
20:
220:
defines an IP block containing all possible IP addresses. It is commonly used in routing to depict the
165:
Besides the use by operating systems internally, other uses have been attributed to the address.
730:
524:"Why accessing 0.0.0.0:443 gets redirected to 127.0.0.1:443 on Linux and how to disallow it?"
283:
624:"Hackers Have Exploited An 18-Year-Old '0.0.0.0-Day' Loophole In Safari, Chrome And Firefox"
681:
490:
169:
A non-routable meta-address used to designate an invalid, unknown or non applicable target
8:
735:
600:
446:
127:
and so are not governed by RFC 1122. These meanings may not be consistent between OS.
673:
114:
725:
663:
480:
60:
366:
396:
709:
705:
701:
697:
693:
684:
653:
506:
502:
493:
474:
338:
64:
343:
719:
677:
554:
221:
204:
49:, who allocate IP addresses globally, have allocated the single IP address
523:
80:
using the notation {0,0}. It prohibits this as a destination address in
668:
485:
288:
154:
84:
and only allows it as a source address under specific circumstances.
258:. The IPv6 variant serves the same purpose as its IPv4 counterpart.
451:
652:
M. Cotton; L. Vegoda; B. Haberman (April 2013). R. Bonica (ed.).
420:
627:
225:
651:
173:
67:
section 3.2.1.3. It is named as "This host on this network".
659:
237:
179:
A way to explicitly specify that the target is unavailable.
102:
81:
153:
as the remote address to connect to the current host (AKA
421:"What's the difference between 127.0.0.1 and 0.0.0.0?"
240:, the all-zeros address is typically represented by
550:"Unix: Getting from here to there (routing basics)"
447:"What It Means When You See the 0.0.0.0 IP Address"
472:
108:
717:
339:"Connecting to IP 0.0.0.0 succeeds. How? Why?"
248:(two colons), which is the short notation of
547:
309:"IANA IPv4 Special-Purpose Address Registry"
541:
41:
160:
667:
484:
621:
444:
412:
392:"bind function (winsock.h) - Win32 apps"
575:
548:Henry-Stocker, Sandra (4 August 2013).
438:
418:
364:
253:0000:0000:0000:0000:0000:0000:0000:0000
718:
445:Mitchell, Bradley (16 December 2018).
332:
330:
261:
176:mechanism in modern operating systems.
655:Special-Purpose IP Address Registries
473:R. Woundy; K. Marez (December 2006).
521:
336:
590:
327:
313:Internet Assigned Numbers Authority
13:
622:Brewster, Thomas (7 August 2024).
522:Kitt, Stephen (19 November 2022).
365:Kerrisk, Michael (22 March 2021).
14:
747:
645:
337:Kitt, Stephen (26 January 2018).
419:Postill, David (2 August 2015).
615:
584:
569:
143:In Linux a program may specify
515:
466:
384:
358:
301:
109:Operating system specific uses
16:Technically invalid IP address
1:
294:
7:
367:"ip(7) — Linux manual page"
277:
21:Internet Protocol Version 4
10:
752:
501:p. 32. Obsoletes RFC
231:
186:
479:. Network Working Group.
42:Official meaning and use
33:can have multiple uses.
161:Other non-standard uses
36:
708:. Updated by RFC
505:. Updated by RFC
690:Best Common Practice.
591:Das, Kaushik (2008).
576:Abraham, Tim (2020).
284:Reserved IP addresses
692:Obsoletes RFC
262:0.0.0.0 day exploit
191:In routing tables,
70:RFC 1122 refers to
499:Proposed Standard.
101:packet when using
593:"IPv6 Addressing"
224:as a destination
115:operating systems
743:
688:
671:
669:10.17487/RFC6890
639:
638:
636:
634:
619:
613:
612:
610:
608:
603:on 11 April 2015
599:. Archived from
588:
582:
581:
573:
567:
566:
564:
562:
545:
539:
538:
536:
534:
519:
513:
497:
488:
486:10.17487/RFC4639
470:
464:
463:
461:
459:
442:
436:
435:
433:
431:
416:
410:
409:
407:
405:
400:. 19 August 2022
388:
382:
381:
379:
377:
362:
356:
355:
353:
351:
334:
325:
324:
322:
320:
315:. 19 August 2009
305:
272:
271:
255:
254:
246:
245:
218:
217:
214:
211:
197:
196:
150:
149:
137:
136:
124:
123:
94:
93:
77:
76:
56:
55:
30:
29:
751:
750:
746:
745:
744:
742:
741:
740:
716:
715:
680:. BCP 153.
648:
643:
642:
632:
630:
620:
616:
606:
604:
589:
585:
580:(1st ed.).
574:
570:
560:
558:
546:
542:
532:
530:
520:
516:
471:
467:
457:
455:
443:
439:
429:
427:
417:
413:
403:
401:
397:Microsoft Learn
390:
389:
385:
375:
373:
363:
359:
349:
347:
335:
328:
318:
316:
307:
306:
302:
297:
280:
269:
268:
264:
252:
251:
243:
242:
234:
215:
212:
209:
208:
194:
193:
189:
163:
147:
146:
134:
133:
121:
120:
111:
91:
90:
87:A host may use
74:
73:
53:
52:
44:
39:
27:
26:
17:
12:
11:
5:
749:
739:
738:
733:
728:
714:
713:
647:
646:External links
644:
641:
640:
614:
583:
568:
540:
528:Stack Exchange
514:
465:
437:
425:Stack Exchange
411:
383:
357:
344:Stack Exchange
326:
299:
298:
296:
293:
292:
291:
286:
279:
276:
263:
260:
233:
230:
188:
185:
184:
183:
180:
177:
170:
162:
159:
110:
107:
43:
40:
38:
35:
15:
9:
6:
4:
3:
2:
748:
737:
734:
732:
729:
727:
724:
723:
721:
711:
707:
703:
699:
695:
691:
686:
683:
679:
675:
670:
665:
661:
657:
656:
650:
649:
629:
625:
618:
602:
598:
594:
587:
579:
572:
557:
556:
555:Network World
551:
544:
529:
525:
518:
512:
508:
504:
500:
495:
492:
487:
482:
478:
477:
469:
454:
453:
448:
441:
426:
422:
415:
399:
398:
393:
387:
372:
368:
361:
346:
345:
340:
333:
331:
314:
310:
304:
300:
290:
287:
285:
282:
281:
275:
273:
259:
257:
256:
247:
239:
229:
227:
223:
222:default route
219:
206:
205:CIDR notation
201:
198:
181:
178:
175:
171:
168:
167:
166:
158:
156:
152:
151:
141:
139:
138:
128:
126:
125:
116:
106:
104:
100:
96:
95:
85:
83:
79:
78:
68:
66:
62:
58:
57:
48:
34:
32:
31:
22:
731:IP addresses
689:
654:
631:. Retrieved
617:
605:. Retrieved
601:the original
596:
586:
577:
571:
559:. Retrieved
553:
543:
531:. Retrieved
527:
517:
510:
498:
475:
468:
456:. Retrieved
450:
440:
428:. Retrieved
424:
414:
402:. Retrieved
395:
386:
374:. Retrieved
370:
360:
348:. Retrieved
342:
317:. Retrieved
312:
303:
267:
265:
250:
249:
241:
235:
207:
202:
192:
190:
164:
145:
144:
142:
132:
131:
129:
119:
118:
112:
99:DHCPDISCOVER
98:
89:
88:
86:
72:
71:
69:
51:
50:
45:
25:
24:
18:
736:0 (number)
720:Categories
295:References
678:2070-1721
289:localhost
155:localhost
633:8 August
597:ipv6.com
452:Lifewire
371:man7.org
278:See also
23:address
726:Routing
270:0.0.0.0
232:In IPv6
210:0.0.0.0
195:0.0.0.0
187:Routing
148:0.0.0.0
135:0.0.0.0
122:0.0.0.0
92:0.0.0.0
75:0.0.0.0
54:0.0.0.0
28:0.0.0.0
676:
628:Forbes
607:7 June
561:7 June
533:7 June
458:7 June
430:7 June
404:7 June
376:7 June
350:7 June
319:7 June
226:subnet
63:
174:APIPA
113:Some
710:8190
706:5736
704:and
702:5735
698:5156
694:4773
685:6890
674:ISSN
660:IETF
635:2024
609:2023
563:2023
535:2023
507:9141
503:2669
494:4639
460:2023
432:2023
406:2023
378:2023
352:2023
321:2023
238:IPv6
203:The
103:DHCP
82:IPv4
65:1122
47:IANA
37:Uses
19:The
682:RFC
664:doi
491:RFC
481:doi
236:In
157:).
140:).
61:RFC
59:to
722::
700:,
696:,
672:.
662:.
658:.
626:.
595:.
552:.
526:.
509:.
489:.
449:.
423:.
394:.
369:.
341:.
329:^
311:.
244:::
105:.
712:.
687:.
666::
637:.
611:.
565:.
537:.
496:.
483::
462:.
434:.
408:.
380:.
354:.
323:.
216:0
213:/
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.