I come from China,Only speak a little English,if something wrong,Please forgive me.
I use the Web Proxy in the 4G SD card, can work when Single-WAN,but can not work when Multi-WAN.
Who can give me some tips, pictures or command.
Thank you!

show us your network diagram, so we can understand what setup works and what setup doesn't work.

show us your network diagram, so we can understand what setup works and what setup doesn't work.

Thank you normis!

firewall nat and mangle

This setup ,the Web proxy does not work
But the same setup in a single WAN single PPPOE, Working properly

I need Web proxy working on this case,I hope you can understand
Thank you!

i beleive that when you activate the web proxy, the traffic it's generated from the router itself, it catch the client request then process it and make the request to internet, so the mangle routes dont see the traffic to internet like clients traffic. log time ago i used proxy and have the same problem, i reolved but dont remember how, maybe in the prerouting rules i identified with the local proxy port? i really dont remember, try it.

yes, if you don't use proxy, then user traffic is mangled in 'forward' chain, where you do load balancing. in case of proxy, you should add mangle rules also in chain=output to load-balance router's requests

Chupaka you're right, that's the way i suggest in my post.. http://forum.mikrotik.com/viewtopic.php?f=2&t=42208

yep, I saw your post in about 5 minutes after posting here ))

jejeje, it's ok "Karma-Men"

Thank you for all the replies. Although the reasons for the language, I still do not quite understand, but I'm going to try.

Thank you for all the replies. Although the reasons for the language, I still do not quite understand, but I'm going to try.

just view the post link'ed above, there's an a graphical example

Thank you for all the replies. Although the reasons for the language, I still do not quite understand, but I'm going to try.

just view the post link'ed above, there's an a graphical example

OK, thanks again. I saw.