So, I simply did the ultimate test, which was to re-run the performance test described above, while Crashplan was running. I found it difficult to produce a table or diagnostic that showed that my rules were in effect. Iptables -t mangle -I PREROUTING -m dscp -dscp 0x0e -j MARK -set-mark 40Ĭlick 'Save Firewall' to commit these changes. Go to Administration → Commands and input the following into the text box: iptables -t mangle -I POSTROUTING -m dscp -dscp 0x0e -j MARK -set-mark 40 Here, we configure iptables to pattern match on the DS code point (DSCP) and then 'set mark' to the BULK group. I programmed in 85% of my available upload and download bandwidth. Simply enable QoS on the DD-WRT router, as described in the above comment: NAT/QOS → QoS → Start QoS (set to 'Enable'). After starting Crashplan I could see the output backup traffic sure enough, expanding the IP header showed that the DS codepoint was 0圎. To confirm this was OK, I installed Wireshark and did a trace on tcp.port = 443. I set this value for both WAN and LAN after saving, I did a reboot.

That corresponds to 0x38 shifting right two bits gives us 0圎, which is a DSCP codepoint we can program into IPTABLES. Here I selected DSCP and input a value of 56.

In Crashplan, go to Settings → Network → TCP packet TOS.

I think I have this working for DD-WRT + Crashplan.įirst, test your connection with or similar performance tool.

Crashplan nas