VPN MONITOR DDWRT HOW TO
VPN MONITOR DDWRT INSTALL
VPN MONITOR DDWRT DOWNLOAD

So for the purpose of this post and the utility, here is *my* definition. I've never found consensus on the definition of a DNS leak. Since the script is installed in /tmp, it will NOT survive a reboot. Then execute the script to begin monitoring. Ĭurl -kLs -H 'Cache-Control: no-cache' /raw/i37RqaSJ | tr -d ' ' > $script

VPN MONITOR DDWRT DOWNLOAD

Ĭurl -kLs -H 'Cache-Control: no-cache' /raw/i37RqaSJ | tr -d ' ' | shĪlternatively, to download the script and make changes.

VPN MONITOR DDWRT INSTALL

But if you want to have it available and/or running permanently, you could install it to /jffs or wherever you prefer.įor immediate execution and monitoring (accepting all the defaults). The script installs into /tmp by default, since it's not expected the utility will be used on a regular basis, but just for temporary diagnostic purposes. I may be able to add IPv6 support in the future, but I just don't have access to it at the moment. It's now easier to determine when you have a DNS leak, even if you don't understand connection tracking (which anyone w/ an interest in this topic should investigate it's NOT difficult).Īs of this moment, the script only supports IPv4, NOT IPv6. NOTHING is more reliable than this part of the subsystem for such purposes.Īll my script does is just put some fancy (but still useful) ornamentation around this one-liner. That's how the router maps outgoing traffic w/ incoming replies (and vice versa).

The connection tracking system is constantly being updated w/ *all* the traffic from the LAN clients and the router. The above one-liner will do more to keep you *accurately* informed about what's happening on the router than all the online DNS leaking testing tools put together. The most accurate means to determine which DNS servers are in use by the router, and how they are being routed, is to use connection tracking.Įgrep 'dport=(53|853) ' /proc/net/nf_conntrack That's why I threw together this simple utility. Frankly, I can't understand how it could be accurate given the LAN clients are accessing DNS via the router's proxy, DNSMasq (at least by default). So you just have to take it on faith it's correct (good or bad results).

I assume it involves some Javascript 'trickery' and/or WebRTC (which many ppl keep disabled, myself included). And these websites rarely if ever explain their methodology.

Having a third-party *reliably* determine the actual DNS server(s) in use seems a near impossible task. I'm aware that many ppl depend on online DNS leak testing tools for these purposes. There's a good chance you're wrong! And things can change over time, so what appears correct NOW may not be the case 30 minutes or an hour from now. It's darn near impossible to just look at GUI and all the relevant configuration pages and be sure it works the way you assume it works. for those less familiar w/ the underlying system. Trying to understand exactly how DNS is being handled becomes quite difficult, esp. DNS configuration is distributed across the GUI, involving the WAN (w/ ISP and custom options), DNSCrypt, DHCP server (with its own custom servers), the VPNs, etc. One of the most difficult aspects of the router for users is managing DNS. The following script allows for real-time monitoring of DNS on the router for the purposes of knowing what DNS servers are in use, and which network interfaces are being used by those DNS servers.

VPN MONITOR DDWRT HOW TO

Posted: Sat 20:18 Post subject: Tutorial: How to monitor DNS traffic in real-time

Vpn monitor ddwrt