# Discourse suddenly not accessible anymore

**URL:** <https://meta.discourse.org/t/discourse-suddenly-not-accessible-anymore/158614>\
**Category:** Self-hosting\
**Created:** [July 23, 2020, 12:56pm UTC](https://meta.discourse.org/t/discourse-suddenly-not-accessible-anymore/158614 "2020-07-23T12:56:03Z")\
**Posts on this page:** 1\
**Showing post:** 1

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**Author:** ![venizia03](https://avatars.discourse-cdn.com/v4/letter/v/dc4da7/32.png) [@venizia03](https://meta.discourse.org/u/venizia03)\
**Post date:** [July 23, 2020, 12:56pm UTC](https://meta.discourse.org/t/discourse-suddenly-not-accessible-anymore/158614/1 "2020-07-23T12:56:03Z")

</div>

Hello!

My discourse instance is not working anymore (nothing has been done on my side).

In production.log, I have got this message:  
`Error connecting to Redis on localhost:6379 (Errno::ENETUNREACH) subscribe failed,`

What I have tryied so far:

- Server reboot
- Update docker + server reboot + rebuild app

I am quite new with docker and discourse and so I do not see what else I can do ☹

Host OS: centos 7  
Proxy: Apache  
Docker: latest version

On the host, I have fail2ban installed and firewalld.  
In the firewalld log, I got strange lines:

```
2020-07-23 14:00:52 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -t filter -X DOCKER-ISOLATION-STAGE-1' failed: iptables: No chain/target/match by that name.

2020-07-23 14:00:52 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -t filter -F DOCKER-ISOLATION-STAGE-2' failed: iptables: No chain/target/match by that name.

2020-07-23 14:00:52 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -t filter -X DOCKER-ISOLATION-STAGE-2' failed: iptables: No chain/target/match by that name.

2020-07-23 14:00:52 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -t filter -F DOCKER-ISOLATION' failed: iptables: No chain/target/match by that name.

2020-07-23 14:00:52 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -t filter -X DOCKER-ISOLATION' failed: iptables: No chain/target/match by that name.

2020-07-23 14:00:53 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -D FORWARD -i docker0 -o docker0 -j DROP' failed: iptables: Bad rule (does a matching rule exist in that chain?).

2020-07-23 14:00:53 WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10 -D FORWARD -i docker0 -o docker0 -j DROP' failed: iptables: Bad rule (does a matching rule exist in that chain?).

```

Any help or advice would be appreciate 🙂  
thx in advance!

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