Portál AbcLinuxu, 8. května 2025 18:36
Snazim sa na sieti rozbehat netflow, pre potrebu monitorovania. Nasiel som tento navod, ktory je primarne urceny pre centos. Ja pouzivam ubuntu server.
http://www.dynamicnetworks.us/netflow/5-configure-flow-tools.html
Podla navodu som chcel vytvrorit skript: /usr/local/netflow/bin/linkme , ale cesta /usr/local/netflow neexistovala. (nainstaloval som uz netflow-tools).
Takze som vytvoril cesty:
[code]sudo mkdir /usr/local/netflow
sudo mkdir /usr/local/netflow/bin[/code]
nasledne som vytvoril v text. editore skript: [code]sudo nano -w /usr/local/netflow/bin/linkme[/code] a toto som vlozil do neho:
[code]#!/usr/bin/perl
$base = "/var/netflow";
if ($ARGV[0] =~ /.*[\/]*(ft-v05[^\/]*$)/) {
$fileName = $1;
} else {
print "Must specify file\n";
exit 1;
}
unless ( symlink("$base/ft/$fileName","$base/$fileName") ) {
print "Unable to create symbolic link: $base/$fileName\n";
exit 1;
}[/code]
urobil som prava pre dany skript aby bol spustatelny:
[code]sudo chmod a+x /usr/local/netflow/bin/linkme[/code]
vytvoril som priecinky pre ukladanie dat:
[code]sudo mkdir -p /var/netflow/
sudo mkdir -p /var/netflow/bin
sudo mkdir -p /var/netflow/ft
sudo mkdir -p /var/netflow/rrds
sudo mkdir -p /var/netflow/scoreboard[/code]
v tom manuali je tento prikaz na spustenie flow-capture:
[code]sudo /usr/local/netflow/bin/flow-capture -w /var/netflow/ft 0/0/2055 -S5 -V5 -E1G -n 287 -N 0 -R /usr/local/netflow/bin/linkme[/code]
ale mne fungoval tento:
[code]sudo flow-capture -w /var/netflow/ft 0/0/2055 -S5 -V5 -E1G -n 287 -N 0 -R /usr/local/netflow/bin/linkme[/code]
tcpdump mi ukazoval prebiehajucu komunikaciu:
[code]tcpdump -n udp port 2055[/code]
pouzitim [code]sudo netstat -lnp[/code]
mi ukazalo ze flow-capture neni v stave listen:
[quote]Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN 4304/mysqld
tcp 0 0 0.0.0.0:139 0.0.0.0:* LISTEN 4655/smbd
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 4746/apache2
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 4627/exim4
tcp 0 0 0.0.0.0:445 0.0.0.0:* LISTEN 4655/smbd
tcp6 0 0 :::22 :::* LISTEN 4206/sshd
udp 0 0 0.0.0.0:2055 0.0.0.0:* 4928/flow-capture
udp 0 0 192.168.76.4:137 0.0.0.0:* 4653/nmbd
udp 0 0 0.0.0.0:137 0.0.0.0:* 4653/nmbd
udp 0 0 192.168.76.4:138 0.0.0.0:* 4653/nmbd
udp 0 0 0.0.0.0:138 0.0.0.0:* 4653/nmbd
udp 0 0 192.168.76.4:123 0.0.0.0:* 3600/ntpd
udp 0 0 127.0.0.1:123 0.0.0.0:* 3600/ntpd
udp 0 0 0.0.0.0:123 0.0.0.0:* 3600/ntpd
udp6 0 0 fe80::21f:d0ff:fe36:123 :::* 3600/ntpd
udp6 0 0 ::1:123 :::* 3600/ntpd
udp6 0 0 :::123 :::* 3600/ntpd
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 2 [ ACC ] STREAM LISTENING 11312 4304/mysqld /var/run/mysqld/mysqld.sock
unix 2 [ ACC ] STREAM LISTENING 11747 4670/winbindd /tmp/.winbindd/pipe
unix 2 [ ACC ] STREAM LISTENING 11749 4670/winbindd /var/run/samba/winbindd_privileged/pipe
[/quote]
teraz neviem ci to je chyba
kontrola ci sa tvoria tmp:
[quote]sudo cd /var/netflow/ft[/quote]
[quote]sudo ls[/quote]
vysledok:
[quote]ft-v05.2009-10-04.105104+0200 ft-v05.2009-10-04.105500+0200 tmp-v05.2009-10-04.110000+0200[/quote]
subor /etc/init.d/flow-capture uz bol vytvoreny takze ho netrebalo vytvorit.
Instalacia flowscan:
[quote]sudo apt-get install flowscan[/quote] (nainstalovali sa aj potrebne perl moduly)
podla navodu pre flowscan som sa chcel: cd cf , ale pise ze cesta nebola najdena, viete poradit ako ziskavat data z flow-capture a zobrazovat a co robim nespravne?
Na otázku zatím nikdo bohužel neodpověděl.
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