WOL automatically for PLEX. Need help with syntax.

Gertjan · Jan 30, 2018, 10:35 PM

….
It looks like I can use clog to make the log files readable by grep, ….

CO2 or not, you have a scripting future ;)

yakboyslim · Feb 1, 2018, 11:07 PM

Well johnpoz, you convinced me. I set up Preview thumbnails. I had been putting it off because I didn't want to eat up my OS drive, but I used a symlink to put that stuff on a data drive and started it up.

I also got a smartthings plug for a separate project and it will report power draw. I plugged my PC into that and as I suspected I am drawing about 160 W at idle. I draw 8.5 during sleep. Using those numbers and 10 hours of on time per day (which is probably a high estimate) I see that I can save $10 a month. That is not insignificant. I agree waking computers from sleep is occasionally troublesome, but for $10 a month I will try it.

I know $120 a year almost makes it seem worth it to get a more efficient Plex server. But TBH my computer (Dell T-5500) was free (I have upgraded it, but most parts are original) and I can use it for Plex, game on it, and do movie editing etc super quick.

Now to figure out this script…

yakboyslim · Feb 2, 2018, 2:40 AM

Here is my script now. I am still getting errors, but I think this is better. The clog | grep part works if I type it into the shell, but it doesn't run as a script.

#!/bin/sh

TARGET='xxx.xxx.xxx.xxx'
MAC='xx:xx:xx:xx:xx:xx'

INTERVAL=2
NUMP=1

OLD_LINE=clog /var/log/filter.log | grep "1497674444" | tail -1
echo "$OLD_LINE"
while sleep $INTERVAL
do
    # Only care about new lines since the script last ran
    NEW_LINE=clog /var/log/filter.log | grep "1497674444" | tail -1
    if [ "$NEW_LINE" -ne "$OLD_LINE" ]
     then
        echo "NEW TRAFFIC"
         RET=`ping -c $NUMP -W 1 $TARGET 2> /dev/null | awk '/packets received/ {print $4}'`
         if [ "$RET" -ne "$NUMP" ]
             then
                # Guess it's sleeping. Send WoL.
                echo "[`date -Iseconds`] WOL. Line was $NEW_LINE"  >> /var/log/wol
                wol -i $TARGET $MAC
                # Could sleep for 20 minutes I guess...I mean, there's no real reason to check again.
                # Whatever...10 seconds is fine.
                sleep 1200
            fi
        fi
    fi
    OLD_LINE='clog /var/log/filter.log | grep "1497674444" | tail -1'
done

Here is the errors I get

[2.4.2-RELEASE][root@pfSense.localdomain]/usr/local/etc/rc.d: sh WOLplex.sh
: not found
: not found
: not found
WOLplex.sh: /var/log/filter.log: Permission denied
tail: illegal option -- -1

WOLplex.sh: 31: Syntax error: "done" unexpected (expecting "then")

Note I cannot execute WOLplex.sh, or ./WOLplex.sh. I bet this might be something simple about permissions, but unfortunately I skipped all the basics so I don't know what I'm missing.

Gertjan · Feb 2, 2018, 10:11 AM

Try this :

#!/bin/sh

OLD_LINE=`clog /var/log/filter.log  | grep "1497674444" | tail -1`

echo "$OLD_LINE"

johnpoz · Feb 2, 2018, 8:58 PM

"drawing about 160 W at idle"

Wow that is running hot… What is it exactly? That was idle - the cpu not doing anything... Or were you mining crypto while it wasn't doing anything ;) hehehe

What does it draw when actually doing something like transcoding a movie or 2?

I did a quick google for T5500 and looks like this one is only drawing 93w idle?
https://www.youtube.com/watch?v=7T4kMcpJVFc

yakboyslim · Feb 2, 2018, 9:31 PM

@johnpoz:

"drawing about 160 W at idle"

Wow that is running hot… What is it exactly? That was idle - the cpu not doing anything... Or were you mining crypto while it wasn't doing anything ;) hehehe

What does it draw when actually doing something like transcoding a movie or 2?

I did a quick google for T5500 and looks like this one is only drawing 93w idle?
https://www.youtube.com/watch?v=7T4kMcpJVFc

I looked at that video, he only has one processor. Mine has two.

It was at idle. I think it's just older server hardware, not designed for idle efficiency.

yakboyslim · Feb 2, 2018, 10:49 PM

IT WORKS! (mostly…)

Had to fix a lot of syntax (shellcheck.net helped a ton) and switch my line break style from windows to unix.

#!/bin/sh
TARGET='192.168.1.200'
MAC='00:25:64:b8:33:85'
INTERVAL=2
NUMP=1
OLD_LINE=$( clog /var/log/filter.log | grep "1497674444" | tail -1 )
echo "Found this $OLD_LINE"
while true
do
    # Only care about new lines since the script last ran
    NEW_LINE=$( clog /var/log/filter.log | grep "1497674444" | tail -1 )
    echo "New $NEW_LINE"
    if [ "$NEW_LINE" != "$OLD_LINE" ]
    then
        echo "NEW TRAFFIC"
        RET=$( ping -c 1 -W 1 192.168.1.200 | awk '/packets received/ {print $4}' )
        if [ "$RET" -ne "$NUMP" ]
        then
            # Guess it's sleeping. Send WoL.
            echo "WOL. Line was $NEW_LINE"  >> /var/log/wol
            wol -i $TARGET $MAC
            # Could sleep for 20 minutes I guess...I mean, there's no real reason to check again.
            # Whatever...10 seconds is fine.
            sleep 1200
        fi
    fi
    echo "WAITING"
    OLD_LINE=$( clog /var/log/filter.log | grep "1497674444" | tail -1 )
    sleep $INTERVAL
    echo "Old $OLD_LINE"
done

It works exactly like it should and wakes my computer no problems when accessed from WAN. Plex is ready in about 10 seconds. I plan to do some other automation (send WOL packet when the living room tv is turned on) so that we don't see that 10 second wait usually.

When I try to access Plex from a device on my network it doesn't work, and double checking it does not appear I have a firewall rule that is tagging that traffic effectively.

Any ideas? Right now I am looking for LAN traffic with a destination port of 32400-32450 which should capture all the ports. I get my LAN/WAN, source/destinations mixed up all the time though.

johnpoz · Feb 3, 2018, 1:40 AM

why would you have a range of ports? Do you have 50 plex servers? Plex by default is port 32400, that is the only port it would be listening on. You get what mixed up source/dest?

yakboyslim · Feb 3, 2018, 2:11 AM

I just re-read my last post and it is not even close to clear, so I apologize for that.

I read somewhere that Plex used 32410-32414 or so for network discovery, I think. I figured I would just set a range and catch it all in there.

Traffic from a device on my local network to my Plex device would be going to that port as the destination on LAN correct?

If both these devices are on the same switch, they might be communicating directly there. Would the router see that traffic for the purposes of firewall rules? I would think so, especially if the Plex server is sleeping and the client has to "look" for it.

johnpoz · Feb 3, 2018, 2:24 AM

If you have a network 192.168.x/24 lets call it - and your on 192.168.x.100 and plex is on 192.168.x.101 - no pfsense would never see that traffic. The only thing plex might have to do is resolve plex.whatever.tld your using to 192.168.x.101

Yes if your .100 box is talking to your .101 plex server the dest would be 32400.. That is IT.. and the source would be whatever random high port your client is using for that session.. Something above 1024 and below 65515..

The only time pfsense would be involved in the traffic is if it was routing it.. so clients on 192.168.x/24 while your plex is on 192.168.y/24