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I have installed the HTTP-Enforcer chrome extension. Now if I open a terminal and type ping I see:

$ ping
PING ( 56(84) bytes of data.
64 bytes from ( icmp_req=1 ttl=51 time=293 ms

kcherenkov is the github user that authored the extension.

Should I be concerned that a chrome extension has affected network traffic from the terminal? Should I also be concerned about any privacy issues with this setup?


# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
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Yes, I did configure the system to use OpenDNS at one time and it's still in effect. Why though would it resolve to the github site of a plugin used by chrome?

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How could a browser extension affect the network stack so deeply? Wouldn't this require a change to the resolver or installation of a proxy, which tends to require superuser/administrative privileges? – Stefan Lasiewski Aug 22 '12 at 21:30
This is weird, could you please post the content of your /etc/resolv.conf? – Alex Aug 22 '12 at 21:32
Okay it's obvious now that your system uses a custom DNS server installed on it (namserver is set to the default local address Again, is NOT a github site of that plugin, it is one of the OpenDNS IP addresses according to its whois info (you can check this using whois The easiest way to fix it temporarily is to edit /etc/resolv.conf manually and to replace nameserver with nameserver ( is a Google public DNS). To make this fix permanent you should consult resolvconf manual, I'm not a big expert here. – Alex Aug 23 '12 at 13:16
up vote 2 down vote accepted

Hmm, is an address from IP adresses block as I just discovered using whois, so the situation seems to be totally unrelated to the Chrome extension. It looks like you are using OpenDNS and it replaced the default resolver with its custom one. This should be OK if you trust this company (and I assume you do).

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+1 Was firing up a VM to play with the extension to see what it did but my machine crashed... This is a much better answer than jumping to conclusions like I was doing. – squillman Aug 22 '12 at 22:05
If you remove the extension, do you still get the same behavior with ping? You probably do, but sometimes it's nice to see a confirmation. – Stefan Lasiewski Aug 22 '12 at 23:13
Now, whether the extension is enabled, disabled or removed the ping of says $ ping PING ( 56(84) bytes of data. 64 bytes from ( icmp_req=1 ttl=50 time=199 ms ? – Synesso Aug 23 '12 at 13:06

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