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Difference between revisions of "Tethered jailbreak"
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| − | A '''tethered jailbreak''' is only able to temporarily jailbreak the device during a single boot. If the user turns the device off and then boots it back up without the help of a jailbreak tool, the device will no longer be running a patched kernel, and it may get stuck in a partially started state, such as [[Recovery Mode]]. In order for the device to start completely and with a patched kernel, it must be "re-jailbroken" with a computer (using the "boot tethered" feature of a tool) each time it is turned on. All changes to the files on the device (such as installed package files or edited system files) will persist between reboots |
+ | A '''tethered jailbreak''' is only able to temporarily jailbreak the device during a single boot. If the user turns the device off and then boots it back up without the help of a jailbreak tool, the device will no longer be running a patched kernel, and it may get stuck in a partially started state, such as [[Recovery Mode]]. In order for the device to start completely and with a patched kernel, it must be "re-jailbroken" with a computer (using the "boot tethered" feature of a tool) each time it is turned on. All changes to the files on the device (such as installed package files or edited system files) will persist between reboots. |
| − | == Using a tethered |
+ | == Using a tethered jailbreak == |
| − | To boot tethered, |
+ | To boot tethered, their user must plug the device into a computer and run the jailbreak tool to "boot tethered". |
| − | If |
+ | If a user attempts to boot the device without using a computer, the device will either be stuck at the Apple logo, in [[Recovery Mode]], or in a seemingly "un-jailbroken" state where [[Cydia.app|Cydia]], Mail, and Safari crash (and jailbreak-only tweaks/themes don't work) - until you boot tethered. |
| + | == Tethered exploits == |
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| − | Tethered jailbreaks behave semi-tethered by default. If you install [[Mobile Substrate]] extensions (tweaks), your device will still be semi-tethered. But if you install Notification Center plugins that don't depend on WeeLoader, your device will no longer be semi-tethered – unless you also install the [http://thebigboss.org/semitethered-jailbreak BigBoss semitether package]. |
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| + | The [[limera1n Exploit]] and other [[bootrom]] exploits can be used to tethered jailbreak older devices on any iOS version, because bootrom exploits take advantage of code that is permanently embedded in the device's hardware, which Apple cannot update with iOS updates. Those tools do usually need minor software updates (not exploit-related) to explicitly support new iOS versions. They also use additional exploits (specific to each iOS version) to produce untethered jailbreaks when possible. |
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| − | |||
| − | == Tethered jailbreaking tools == |
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| − | [[redsn0w]] and [[sn0wbreeze]] are permanently able to use [[limera1n Exploit|limera1n]] and other [[bootrom]] exploits to jailbreak older devices tethered on any iOS version (including iPhone 3GS, iPhone 4, iPod touch 3rd generation, iPod touch 4th generation, iPad, and Apple TV 2G), because bootrom exploits take advantage of code that is permanently embedded in the device's hardware, which Apple cannot update with iOS updates. Those tools do usually need minor software updates (not exploit-related) to explicitly support new iOS versions. They also use additional exploits (specific to each iOS version) to produce untethered jailbreaks when possible. |
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The initial jailbreak for the [[N72AP|iPod touch 2G]] was tethered, until the hybrid dev team released the [[0x24000 Segment Overflow]]. The codename for the tethered jailbreak was [[redsn0w Lite]]. |
The initial jailbreak for the [[N72AP|iPod touch 2G]] was tethered, until the hybrid dev team released the [[0x24000 Segment Overflow]]. The codename for the tethered jailbreak was [[redsn0w Lite]]. |
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| + | |||
| + | ==See Also== |
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| + | *[[Jailbreak]] |
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| + | *[[Jailbreak Exploits]] |
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| + | *[[Untethered jailbreak]] |
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| + | *[[Semi-tethered jailbreak]] |
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| + | *[[Semi-untethered jailbreak]] |
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[[Category:Jailbreaking]] |
[[Category:Jailbreaking]] |
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Revision as of 12:59, 11 March 2017
A tethered jailbreak is only able to temporarily jailbreak the device during a single boot. If the user turns the device off and then boots it back up without the help of a jailbreak tool, the device will no longer be running a patched kernel, and it may get stuck in a partially started state, such as Recovery Mode. In order for the device to start completely and with a patched kernel, it must be "re-jailbroken" with a computer (using the "boot tethered" feature of a tool) each time it is turned on. All changes to the files on the device (such as installed package files or edited system files) will persist between reboots.
Using a tethered jailbreak
To boot tethered, their user must plug the device into a computer and run the jailbreak tool to "boot tethered".
If a user attempts to boot the device without using a computer, the device will either be stuck at the Apple logo, in Recovery Mode, or in a seemingly "un-jailbroken" state where Cydia, Mail, and Safari crash (and jailbreak-only tweaks/themes don't work) - until you boot tethered.
Tethered exploits
The limera1n Exploit and other bootrom exploits can be used to tethered jailbreak older devices on any iOS version, because bootrom exploits take advantage of code that is permanently embedded in the device's hardware, which Apple cannot update with iOS updates. Those tools do usually need minor software updates (not exploit-related) to explicitly support new iOS versions. They also use additional exploits (specific to each iOS version) to produce untethered jailbreaks when possible.
The initial jailbreak for the iPod touch 2G was tethered, until the hybrid dev team released the 0x24000 Segment Overflow. The codename for the tethered jailbreak was redsn0w Lite.
