# how to enabled EXT-X-ALLOW-CACHE tag **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [March 30, 2011, 3:03pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774 "2011-03-30T15:03:03Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Michael\_Chan](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Michael\_Chan](https://community.wowza.com/u/Michael_Chan)\ **Post date:** [March 30, 2011, 3:03pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/1 "2011-03-30T15:03:03Z")
Hi, Can someone point me in the right direction on how to configure wowza to create m3u8’s with the line “#EXT-X-ALLOW-CACHE:NO” Below is a part of an m3u8 which my wowza is generating currently: #EXTM3U #EXT-X-TARGETDURATION:10 #EXT-X-MEDIA-SEQUENCE:1 #EXTINF:10, media\_1.mp3?wowzasessionid=xxxxxxx #EXTINF:10, media\_2.mp3?wowzasessionid=xxxxxxx #EXTINF:10, media\_3.mp3?wowzasessionid=xxxxxxx #EXTINF:10, media\_4.mp3?wowzasessionid=xxxxxxx This is what I would like the m3u8 to be instead: #EXTM3U #EXT-X-ALLOW-CACHE:NO #EXT-X-TARGETDURATION:10 #EXT-X-MEDIA-SEQUENCE:1 #EXTINF:10, media\_1.mp3?wowzasessionid=xxxxxxx #EXTINF:10, media\_2.mp3?wowzasessionid=xxxxxxx #EXTINF:10, media\_3.mp3?wowzasessionid=xxxxxxx #EXTINF:10, media\_4.mp3?wowzasessionid=xxxxxxx Thanks, Michael ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [March 30, 2011, 1:22pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/2 "2011-03-30T13:22:12Z")
Michael, What are you trying to do or prevent? Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [March 30, 2011, 2:20pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/3 "2011-03-30T14:20:30Z")
I get that. What is the goal, purpose of doing this? Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [March 30, 2011, 3:54pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/4 "2011-03-30T15:54:06Z")
In any case, further info here, I don’t think it is possible to do this. Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [March 30, 2011, 4:29pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/5 "2011-03-30T16:29:36Z")
We will look at adding a way to do this. Richard ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [March 31, 2011, 4:33pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/6 "2011-03-31T16:33:50Z")
It is something we will consider. It’s on a list. Richard ---
**Author:** ![Michael\_Chan](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Michael\_Chan](https://community.wowza.com/u/Michael_Chan)\ **Post date:** [March 31, 2011, 12:04am UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/7 "2011-03-31T00:04:05Z")
Hi Richard, Currently our Apple HTTP Live Streams are generating m3u8’s without the “#EXT-X-ALLOW-CACHE:NO” line. I’ve been asked by our developers to add the line “#EXT-X-ALLOW-CACHE:NO” to the Wowza generated m3u8 playlist. They would like to test streams with the EXT-X-ALLOW-CACHE option. Thanks, Michael ---
**Author:** ![Michael\_Chan](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Michael\_Chan](https://community.wowza.com/u/Michael_Chan)\ **Post date:** [March 31, 2011, 11:14am UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/8 "2011-03-31T11:14:15Z")
Thanks Richard. I’ve asked the developers why they need this again. Will respond with more info once they provide an answer. ---
**Author:** ![Michael\_Chan](https://avatars.discourse-cdn.com/v4/letter/m/b487fb/32.png) [@Michael\_Chan](https://community.wowza.com/u/Michael_Chan)\ **Post date:** [March 31, 2011, 3:25pm UTC](https://community.wowza.com/t/how-to-enabled-ext-x-allow-cache-tag/34774/9 "2011-03-31T15:25:59Z")
Heres the response from developers for why “We want (have to) follow all possible measures to prevent caching by browsers - this option is in the HLS spec precisely for this reason.”