board for dns server

[yogui]

Hello, 
for bypass the fu***g loopback blocking from my internet box I need to build a DNS server. I make some test with a OPI pc plus, it works (sofware).
but it looks like that the internet connection is slower using this dns server. 
It due to the only 100mb network kard from my opi?
if this is the case what do you suggest to use for boad for this application
thanks in advance for your remarks 

[Igor_K]

I've got 2 dnscrypt-proxy running in my home network. Both are NanoPi NEO (RAM 512Mb).  They are idle almost all the time. 

the traffic as about 10 Kib per server. 100Mb is enough for sure. I suspect this is a setup issue. 

[yogui]

Hi 

thank for your answere I will check my config.

witch tool do you use for your network trace

regards

Yogui