# Timeout on waiting for first finalized header when start light client

**URL:** <https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742>\
**Category:** General\
**Created:** [December 10, 2023, 1:17am UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742 "2023-12-10T01:17:45Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![big\_rod](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/big_rod/32/398_2.png) [@big\_rod](https://forum.availproject.org/u/big_rod)\
**Post date:** [December 10, 2023, 1:17am UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/1 "2023-12-10T01:17:45Z")

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info from discord  
any one help?

 ![image](https://europe1.discourse-cdn.com/flex013/uploads/availproject/original/1X/220766eac74207c743b051c59ce73a051e21ab1f.webp)

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**Author:** ![AstroNodes](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/astronodes/32/367_2.png) [@AstroNodes](https://forum.availproject.org/u/AstroNodes)\
**Post date:** [December 11, 2023, 1:37am UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/2 "2023-12-11T01:37:51Z")

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I think the problem is about your connection because after bootstrap done you couldn’t get even first finalized header, check your tcp port and be sure firewall not blocked you.

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**Author:** ![big\_rod](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/big_rod/32/398_2.png) [@big\_rod](https://forum.availproject.org/u/big_rod)\
**Post date:** [December 11, 2023, 4:02am UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/3 "2023-12-11T04:02:20Z")

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defaut port is 37000?

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**Author:** ![robin-rrt](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/robin-rrt/32/15_2.png) [@robin-rrt](https://forum.availproject.org/u/robin-rrt)\
**Post date:** [December 11, 2023, 8:55am UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/4 "2023-12-11T08:55:16Z")

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Could you try running it again, and ensure that your connection is stable. Not able to replicate the issue. If you still get the same error, let us know

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**Author:** ![big\_rod](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/big_rod/32/398_2.png) [@big\_rod](https://forum.availproject.org/u/big_rod)\
**Post date:** [December 12, 2023, 3:32am UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/5 "2023-12-12T03:32:16Z")

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I have replicated the issue in my server.

1. run by docker ubuntu:22.04, with --net=host flag
2. expose port 37000, 37001 on firewall, check successfully by nc
3. start cmd is ./avail-light-linux-amd64 --network goldberg

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**Author:** ![fLuXx](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/fluxx/32/339_2.png) [@fLuXx](https://forum.availproject.org/u/fLuXx)\
**Post date:** [December 12, 2023, 12:17pm UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/6 "2023-12-12T12:17:48Z")

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What light-client version are you running? In the latest RC, we have a better log which can help, it might not have anything to do with the connection, actually. It might be the state is dirty. Try running with --clean flag.

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**Author:** ![big\_rod](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/big_rod/32/398_2.png) [@big\_rod](https://forum.availproject.org/u/big_rod)\
**Post date:** [December 12, 2023, 12:33pm UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/7 "2023-12-12T12:33:12Z")

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1.7.4 pre-compiled binary, first start node, i will try --clean flag or RC version. thanks

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**Author:** ![big\_rod](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/big_rod/32/398_2.png) [@big\_rod](https://forum.availproject.org/u/big_rod)\
**Post date:** [December 12, 2023, 1:30pm UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/8 "2023-12-12T13:30:09Z")

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![image](https://europe1.discourse-cdn.com/flex013/uploads/availproject/original/1X/a06bd631418de7abc9aada77ed316a8f68f1ba68.jpeg)

version 1.7.5-RC3

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<div class="post-metadata">

**Author:** ![fLuXx](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/fluxx/32/339_2.png) [@fLuXx](https://forum.availproject.org/u/fLuXx)\
**Post date:** [December 12, 2023, 4:05pm UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/9 "2023-12-12T16:05:36Z")

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You are missing ca-certificates package in your distro/docker setup.

Edit: on ubuntu, it’s simply:

`sudo apt install ca-certificates`

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<div class="post-metadata">

**Author:** ![big\_rod](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.availproject.org/big_rod/32/398_2.png) [@big\_rod](https://forum.availproject.org/u/big_rod)\
**Post date:** [December 12, 2023, 4:10pm UTC](https://forum.availproject.org/t/timeout-on-waiting-for-first-finalized-header-when-start-light-client/742/10 "2023-12-12T16:10:57Z")

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done, thanks for your help