What performance to expect using a Raspberry Pi as a firewall?

I’ve tested 3 different Raspberry Pi used as firewalls at measured the performance I was getting. The Raspberry Pis are: Model 2B, rev 1.1 (a01041) with a BCM2835 processor, 1

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hwclock: ioctl(RTC_RD_TIME) to /dev/rtc to read the time failed: Invalid argument

This error occurred on Raspbian Jessie using an ARPI600. I was trying to set up the real-time clock. I could resolve the issue by running the following command: hwclock –systohc

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