Obsah
OpenWRT tipy, finty
nastaveni time zone
echo "CET-1CEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00" > /etc/TZ
http://wiki.openwrt.org/oldwiki/openwrtdocs/whiterussian/configuration
statistiky provozu
- jak nahradit hotsanic? :) - pomoci iptables
root@HomeRouterII:~# iptables -L INPUT -vxn
Chain INPUT (policy ACCEPT 8444 packets, 1003147 bytes)
pkts bytes target prot opt in out source destination
1828997 189743951 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
30524 1893399 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0
10019 529628 syn_flood tcp -- * * 0.0.0.0/0 0.0.0.0/0 tcp flags:0x17/0x02
2153813 265801766 input_rule all -- * * 0.0.0.0/0 0.0.0.0/0
2153766 265799194 input all -- * * 0.0.0.0/0 0.0.0.0/0
- pomoci -z lze zresetovat statistiky
- pokud nebude moc big.. lze pouzit rrdtool
- mozna neni vubec potreba perl.. proc?
- tutorial na rrdtool nepouziva perl :) http://oss.oetiker.ch/rrdtool/tut/rrdtutorial.en.html
- neci pokus a jednoduchy statistiky.. ale s perlem :) http://sandbox.cz/~covex/czfree/rrstats.html
- zavislosti u openwrt rrdtool (74066) → librrd (655035) → libart (97986), libfreetype (486683), libpng (296830), zlib (80048)
- velikost potrebna pro rrdtool: ~ 1.7MB
iftop
- kolik zabere? :)
- iftop (62791), libpcap (180563), libncurses (425516), libpthread (83890)
- celkem ~ 800K
Generovani NetFlow na embedded zarizeni
- zkousel jsem generovat NetFlow pomoci fprobe/nprobe na mem RSpro .. pri 4Mbit to zralo asi 30% fprobe a 60% nprobe CPU, pamet minimalne
- dnes jsem videl v akci router board 750 GL s Atheros AR7242 400MHz a 64 MB RAM, CPU bylo kolem 20% pri nf9, rikaji tomu traffic-flow
- fprobe ma nejaky special modul pro cteni paketu z jadra, ale neumi nf9 a pry obsahuje hodne chyb
- nadeje vkladam do ipt-netflow projektu :) pry je hodne rychly :)
build konkretni vereze kernel
Tweak the LINUX_VERSION variable in target/linux/ar71xx/Makefile. Supported Kernels are listed in include/kernel-version.mk