i dont know?????

[grimani]

i dont have firewal or router but sign on the bottom of the screen is yellow all the time and my connection is to low sometimes goes up but sign is still yellow

[Switeck]

Your modem may also contain a mini-router and/or firewall that needs to be disabled or configured.

You may have antivirus software that also contains a (hidden?) firewall that needs to be disabled or configured.

Some viruses, trojans, and even adware/spyware can act like firewalls...because they route some traffic through them but do it incorrectly.

Any or all of those may be your problem.