main steps

create a worker on cloudflare

1. get a domain,like xxx.com
2. add xxx.com to cloudflare
3. create workders on cloudflare Workers & Pages
4. hit the Quick edit button copy work_sample.js to it
5. modify the userID at line 7 of yours
6. add the Custom Domains,add a subdomain of yours,like v2.xxx.com
7. wait the process,and type the v2.xxx.com/your_uuid
8. copy the vless line to your passwall

filter the ip

1. get the node id, type cat /etc/config/passwall
2. edit the cf.sh,replace xxxx at line 23 of your node id
3. get the CloudflareSpeedTest from CloudflareSpeedTest

# update tar 
opkg update
opkg upgrade tar

# get the CloudflareSpeedTest
wget https://github.com/XIU2/CloudflareSpeedTest/releases/download/v2.2.5/CloudflareST_linux_amd64.tar.gz

# unzip
tar -xzvf CloudflareST_linux_amd64.tar.gz CloudflareST 

5. bash cf.sh and wait...
6. use wget https://cdn.cloudflare.steamstatic.com/steam/apps/256843155/movie_max.mp4 && rm -rf movie* to test the true speed..
7. add the task on your openwrt like 0 18 * * * bash /root/cf_start.sh > /dev/null