Setup and test syslog

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fizikz
DD-WRT User


Joined: 10 Nov 2016
Posts: 265
PostPosted: Tue Dec 06, 2016 19:29    Post subject: Setup and test syslog Reply with quote
I've been getting random reboots on my WAP with dd-wrt so I want some clues as to what's going on. The WAP has Syslogd enabled, but its logs get wiped after each reboot.

I would like to setup a remote server. In dd-wrt under Services -> Remote Server (for system log) I put the IP of my computer, which is static. On my computer, running Ubuntu, there is rsyslog. I believe the configuration is to be set in /etc/rsyslog.d/50-default.conf. Would adding a line like this be correct?

Code:
"ip-of-ddwrt-wap"   /var/log/ddwrt.log


Also how can I quickly test if it's working (aside from rebooting the WAP)?
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ian5142
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Joined: 23 Oct 2013
Posts: 2319
Location: Canada
PostPosted: Wed Dec 07, 2016 4:30    Post subject: Not a DD-WRT issue Reply with quote
This is not actually a dd-wrt issue but I did find a possible solution, note I do not personally run an Ubuntu box, so I did not test it. http://askubuntu.com/questions/53910/how-can-i-receive-syslog-logs-from-a-networked-system
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Atheros:
Netgear R7800 x3 - WDS AP / station, gateway, QoS
TP-Link Archer C7 v2 x2 - WDS Station
TP-Link TL-WDR3600 v1 - WDS Station
TP-Link 841nd v8 - NU
D-Link 615 C1/E3/I1 x 7 - 1 WDS station
D-Link 825 B1 - NU
D-Link 862L A1 x2 - WDS Station
Netgear WNDR3700v2 - NU
UBNT loco M2 x2 - airOS

Broadcom
Linksys EA6400 - Gateway, QoS
Asus N66U - AP
Netgear WNDR3700v3 - not used
MediaTek
UBNT EdgeRouter X - switch
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fizikz
DD-WRT User


Joined: 10 Nov 2016
Posts: 265
PostPosted: Wed Dec 07, 2016 7:07    Post subject: Reply with quote
It's not specific to ddwrt, but something that (linux) users might encounter.

So, along with the advice from the link above to uncomment the following lines in /etc/rsyslog.conf:

Code:
#$ModLoad imudp
#$UDPServerRun 514


I also made a new file /etc/rsyslog.d/10-custom.conf with the lines:

Code:
#save messages from TP-Link TL-WR841N
if $fromhost-ip == '192.168.2.2' then /var/log/WR841N.log
& stop


which redirects logging from the WAP's IP (192.168.2.2) to it's own file on the remote syslog server, and prevents further processing by rsyslog (& stop). Tips from: http://www.rsyslog.com/storing-messages-from-a-remote-system-into-a-specific-file/
and
http://askubuntu.com/questions/186592/how-do-i-configure-rsyslog-to-send-logs-from-a-specific-program-to-a-remote-sysl

It works. Smile
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