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Jaroslaw
New Recruit
51 pts: Hero points 5 pts: Rep. points LEVEL 0

I Have 503 error on images where I use CDN

I Have 503 error on images where i use CDN. When I deactivate CDN it works but I want use Smush CDN and Lazy Load option for google page speed insight scor.

Fri, 20 Sep 2019 15:46:45

Ash
- WordPress Hacker
- 3,786 pts: Hero points 38,469 pts: Rep. points LEVEL 30
Hello Jaroslaw

This issue may happen because of two possible reasons:

1. Maybe a plugin conflict. Would you please proceed a conflict test? Please deactivate all plugins except Smush Pro and check if the problem gone. If so, then enable all plugins one by one and find which one is having conflict. You need to do the same with themes as well.

You can find the flowchart here: https://premium.wpmudev.org/docs/getting-started/getting-support/#initial-troubleshooting

2. Make sure the following IPs are not blocked by your server firewall, you may need to contact the host:
```
WPMU DEV IP addresses:
66.135.60.59
66.135.49.214
66.135.60.64
165.227.66.214
192.241.140.159
104.236.132.222
192.241.148.185

WP-Smush:
159.89.254.12

Uptime:
34.196.51.17
52.57.5.20

SmartCrawl:
35.171.56.101
45.55.78.242
```
Let us know how it goes.

Cheers,
Ash

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