Those temperatures are very normal. When I was using 2011, mine was constantly around ± 40, except when I did big downloads at 100 Mb/s using wifi the temp will go up to 65.
I have also the same like you, but maybe smaller. The 2011 for desktop with full load (the average is about 80%), many IPsec VPNs running, 300 Mbps bandwidth, shared with about 10 apartments, and is inside this with door and closed in the back
Is perfectly… It has two small holes made with a drill in the top, and a 2 inches hole in a side with a small fan and it runs perfectly. The fan only work in summer days when the temperature outside is about 40 degress