[Solved] Setting up Local Server on Synology NAS - port problems?

[Emilio]

Hi,

These are the steps I followed with no avail:

• Installed Java module using Diskstation´s Package Center
• Created a blynk folder using Diskstation’s File Station
• Downloaded latest Blynk server (server-0.29.5-java8.jar) and stored it into the blynk folder
• Via PuTTY, ran the cmd: sudo java -jar /volume1/blynk/server-0.29.5-java8.jar -dataFolder /volume1/blynk/
  From which I got the following response:

“Blynk Server 0.29.6-SNAPSHOT successfully started.
All server output is stored in folder ‘/logs’ file.
Your Admin login email is admin@blynk.cc
Your Admin password is admin”

In Diskstation Firewall opened ports 8441, 8442 and 8443 and associated them to ALL protocols as destination.

But http://192.168.0.250:8443 (8441 or 8442) on local network won’t connect to the server.

I which step I went wrong?
TIA

[Dmitriy]

8443 is the app port and not the http port.

[Emilio]

Ok so, is it 7443? because it does not respond either.

[Dmitriy]

blynkkk/blynk-server

[Jamin]

If you have an Intel based Diskstation, then you can run Docker and use my Blynk Server image.

[Emilio]

@Dmitriy Thanks for the link. Indeed it’s 9443 and being a SSL protocol needs to use https so, worked.

@Jamin Unfortunately, mine has an ARM71

@Xandr Your suggestion to modify crontab to auto start Blynk server did not work in my case. Is there a way to test the crontab file? I’m not too keen in Linux

[Xandr]

Did you change path to your Blynk server? Also check path to java. Did you see some errors when run watchdog.sh? And be careful, sudo doesn’t work in cron/scripts when you don’t use sudo without password.

[Emilio]

@Xandr thanks for getting back to me.

sudo java -jar /volume1/blynk/server-0.29.5-java8.jar -dataFolder /volume1/blynk/ [works]

this code fails with a command error (all my files are in the blynk folder):

#!/bin/sh
#
#Watchdog script for blynk server
#
stat=`/bin/ps -aux | /bin/grep -c "blynk"`
server="server-0.29.6.jar"
if [ $stat -lt "2" ]; then
/usr/local/bin/java -Djava.net.preferIPv4Stack=true -jar /volume1/blynk/$server -serverConfig /volume1/blynk/server.properties -dataFolder /volume1/blynk/ &
fi

How do I foud out java’s path?

[mikekgr]

Type: which java at the console

[Emilio]

Thanks. which java returns
/var/packages/Java8/target/j2sdk-image/bin/java

So, I replaced the line in watchdog.sh from

/usr/local/bin/java -Djava.net.preferIPv4Stack=true -jar /volume1/blynk/$server -serverConfig

to

/var/packages/Java8/target/j2sdk-image/bin/java -Djava.net.preferIPv4Stack=true -jar /volume1/blynk/$server -serverConfig

but now I get a command not found error

[Xandr]

Path you can find with command

admin@nas:~$ which java
/usr/local/bin/java

I see in your script server=“server-0.29.6.jar” for you it should be server=“server-0.29.5-java8.jar” and if you don’t use config file for your server delete -serverConfig /volume1/blynk/server.properties.

Ooops, late reply)

[mikekgr]

@Emilio

/var/packages/Java8/target/j2sdk-image/bin/java

try /var/packages/Java8/target/j2sdk-image/bin/java -version

what do you get on screen?

[Emilio]

openjdk version “1.8.0_151”
OpenJDK Runtime Environment (IcedTea 3.6.0) (linux-gnu build 1.8.0_151-b12)
OpenJDK Client VM (build 25.151-b12, mixed mode)

[Emilio]

So, should the file be like this

#!/bin/sh
#
#Watchdog script for blynk server
#
stat=`/bin/ps -aux | /bin/grep -c "blynk"`
server="server-0.29.5-java8.jar"
if [ $stat -lt "2" ]; then
/var/packages/Java8/target/j2sdk-image/bin/java -Djava.net.preferIPv4Stack=true -jar /volume1/blynk/$server -dataFolder /volume1/blynk/ &
fi

because it still gives me the error.

[Xandr]

Please provide me additional information:

1. ls -lah /volume1/blynk/
2. console screen with error (did you run script sudo watchdog.sh?)

[Emilio]

1. ls -lah /volume1/blynk/

   total 18M
   drwxrwxrwx+ 9 root root 4.0K Jan 12 12:16 .
   drwxr-xr-x 21 root root 4.0K Jan 10 14:36 …
   -rwxrwxrwx+ 1 root root 308 Jan 10 13:33 admin@blynk.cc.Blynk.user
   drwxrwxrwx+ 2 root root 4.0K Jan 10 13:33 backup
   drwxrwxrwx+ 2 Emilio users 4.0K Jan 11 19:56 blynk_data
   drwxrwxrwx+ 2 root root 4.0K Jan 10 13:32 clone
   drwxrwxrwx+ 2 root root 4.0K Jan 10 13:32 deleted
   drwxrwxrwx+ 4 root root 4.0K Jan 10 14:36 @eaDir
   -rwxrwxrwx+ 1 Emilio users 176 Jan 10 14:02 mail.properties
   drwxrwxrwx+ 3 root root 4.0K Jan 11 21:02 #recycle
   -rwxrwxrwx+ 1 admin users 17M Jan 10 12:25 server-0.29.5-java8.jar
   -rwxrwxrwx+ 1 Emilio users 4.7K Jan 11 20:10 server.properties
   drwxrwxrwx+ 6 root root 4.0K Jan 11 21:19 static
   ---------- 1 admin users 291 Jan 12 12:16 watchdog.sh

2. console screen with error (did you run script sudo watchdog.sh?) yes
   

   

[Xandr]

Something strange with access rights for file watchdog.sh. Run command sudo chmod 755 watchdog.sh

[Emilio]

@Xandr

sudo chmod 755 watchdog.sh

chmod: cannot access ‘watchdog.sh’: No such file or directory

[Xandr]

If you are not in dir /volume1/blynk you should cd to it or run command with full path sudo chmod 755 /volume1/blynk/watchdog.sh

[Emilio]

I realized a bit late I needed to put the full path.

No errors when executing sudo /volume1/blynk/watchdog.sh

but cannot get in using https://192.168.0.250:9443/admin