# Extension time revision 0 not supported

**URL:** <https://forums.rockylinux.org/t/extension-time-revision-0-not-supported/12224>\
**Category:** Rocky Linux Help & Support\
**Created:** [December 19, 2023, 12:58pm UTC](https://forums.rockylinux.org/t/extension-time-revision-0-not-supported/12224 "2023-12-19T12:58:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fishbone](https://avatars.discourse-cdn.com/v4/letter/f/898d66/32.png) [@fishbone](https://forums.rockylinux.org/u/fishbone)\
**Post date:** [December 19, 2023, 12:58pm UTC](https://forums.rockylinux.org/t/extension-time-revision-0-not-supported/12224/1 "2023-12-19T12:58:35Z")

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when i add rule in iptables, the rule is  
`iptables -I OUTPUT -p tcp --dport 80 -m time --timestart 19:00:00 --timestop 23:00:00 --kerneltz -j REJECT`

then the system gives a prompt

```auto
Warning: Extension time revision 0 not supported, missing kernel module?
iptables v1.8.8 (nf_tables): RULE_INSERT failed (No such file or directory): rule in chain OUTPUT

```

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex020/uploads/rockylinux/original/1X/91b7219eec10e30013422e4df76c1d898711a5d5.svg) [@system](https://forums.rockylinux.org/u/system)\
**Post date:** [February 17, 2024, 12:58pm UTC](https://forums.rockylinux.org/t/extension-time-revision-0-not-supported/12224/2 "2024-02-17T12:58:39Z")

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