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| -rw-r--r-- | contrib/qos/README | 3 | ||||
| -rw-r--r-- | contrib/qos/tc.sh | 41 |
2 files changed, 44 insertions, 0 deletions
diff --git a/contrib/qos/README b/contrib/qos/README new file mode 100644 index 0000000000..f419685744 --- /dev/null +++ b/contrib/qos/README @@ -0,0 +1,3 @@ +This is a Linux bash script that will set up tc to limit the outgoing bandwidth for connections to the Bitcoin network. It limits outbound TCP traffic with a source or destination port of 8333, but not if the destination IP is within a LAN (defined as 192.168.x.x). + +This means one can have an always-on bitcoind instance running, and another local bitcoind/bitcoin-qt instance which connects to this node and receives blocks from it. diff --git a/contrib/qos/tc.sh b/contrib/qos/tc.sh new file mode 100644 index 0000000000..f620604212 --- /dev/null +++ b/contrib/qos/tc.sh @@ -0,0 +1,41 @@ +#network interface on which to limit traffic +IF="eth0" +#limit of the network interface in question +LINKCEIL="1gbit" +#limit outbound Bitcoin protocol traffic to this rate +LIMIT="160kbit" +#defines the address space for which you wish to disable rate limiting +LOCALNET="192.168.0.0/16" + +#delete existing rules +tc qdisc del dev ${IF} root + +#add root class +tc qdisc add dev ${IF} root handle 1: htb default 10 + +#add parent class +tc class add dev ${IF} parent 1: classid 1:1 htb rate ${LINKCEIL} ceil ${LINKCEIL} + +#add our two classes. one unlimited, another limited +tc class add dev ${IF} parent 1:1 classid 1:10 htb rate ${LINKCEIL} ceil ${LINKCEIL} prio 0 +tc class add dev ${IF} parent 1:1 classid 1:11 htb rate ${LIMIT} ceil ${LIMIT} prio 1 + +#add handles to our classes so packets marked with <x> go into the class with "... handle <x> fw ..." +tc filter add dev ${IF} parent 1: protocol ip prio 1 handle 1 fw classid 1:10 +tc filter add dev ${IF} parent 1: protocol ip prio 2 handle 2 fw classid 1:11 + +#delete any existing rules +#disable for now +#ret=0 +#while [ $ret -eq 0 ]; do +# iptables -t mangle -D OUTPUT 1 +# ret=$? +#done + +#limit outgoing traffic to and from port 8333. but not when dealing with a host on the local network +# (defined by $LOCALNET) +# --set-mark marks packages matching these criteria with the number "2" +# these packages are filtered by the tc filter with "handle 2" +# this filter sends the packages into the 1:11 class, and this class is limited to ${LIMIT} +iptables -t mangle -A OUTPUT -p tcp -m tcp --dport 8333 ! -d ${LOCALNET} -j MARK --set-mark 0x2 +iptables -t mangle -A OUTPUT -p tcp -m tcp --sport 8333 ! -d ${LOCALNET} -j MARK --set-mark 0x2 |