Hi,
To have a proper web management working you have to follow below steps :
> copy both packages under /var/tmp
> request system software add no-validate /var/tmp/jweb-15.1R5.5-signed.tgz (required by jweb-ex-app-15.1A3-signed.tgz)
> request system software add no-validate /var/tmp/jweb-ex-app-15.1A3-signed.tgz
# set system servies web-management http (it's a hidden CLI , just copy/paste)
Here we go :
http://1.1.1.1 (Loopback Address)
Make sure there is no firewall filter blocking your http traffic towards the EX RE.
I's working fine for me on EX8208. very nice web interface.
I hope it helps. good luck.
BR/
Zakour