If you are using the WebUI to manage your Juniper SSG / ScreenOS device, you probably encountered the following error accessing the page lately :
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
If you use a browser that allow SSLv3, you will be able to access the device. However as we all know the weakness of this protocol, it isn’t ideal to have it enabled. The workaround is to change the cipher on the ScreenOS device.
1. Login to your SSG firewall through SSH.
2. Enter the following command :
set ssl encrypt 3des sha-1
3. Save the configuration :
save