Custom DDNS script status

[BartmanEH]

I'm using the Merlin Wiki script for DDNS for Cloudflare. It works from terminal in Merlin but how do I know it's working autonomously? The built-in DDNS services have "Registration Successful" message in the DDNS GUI webpage but I don't see any status for Custom script even though its posting "/sbin/ddns_custom_updated 1"

 

[BartmanEH]

bump. no one here using Custom DDNS scripts?

 

[dave14305]

Does your syslog contain an entry for ddns “Completed custom ddns update” or “Custom ddns update failed”? Those messages appear by running the ddns_custom_updated command.

 

[BartmanEH]

I'm a bit of a hack with command line but with some AI help, I executed "grep "custom ddns update" /tmp/syslog.log" which returned no results.

 

[dave14305]

Let’s see the output of these commands:

ls -l /jffs/scripts/ddns-start
nvram get jffs2_scripts
cat /jffs/scripts/ddns-start
/sbin/ddns_custom_updated 0
grep ddns /jffs/syslog.log

 

[BartmanEH]

ls -l /jffs/scripts/ddns-start
-rwxrwxrwx 1 admin root 928 Feb 23 18:25 /jffs/scripts/ddns-start

nvram get jffs2_scripts
1

cat /jffs/scripts/ddns-start
#!/bin/sh
ZONEID=<redacted>
RECORDID=<redacted>
RECORDNAME=<redacted>
API=<redacted>
IP=${1}
LOGFILE=/jffs/scripts/ddns-update.log
DATE=$(date +"%Y-%m-%d %T")
if [ -z "$IP" ]; then
echo "$DATE: Error: No IP address parameter provided." >> "$LOGFILE"
echo "Error: No IP address parameter provided."
exit 1 # Exit with an error code
fi
curl -fs -o /dev/null -X PUT "https://api.cloudflare.com/client/v4/zones/$ZONEID/dns_records/$RECORDID" \
-H "Authorization: Bearer $API" \
-H "Content-Type: application/json" \
--data "{\"type\":\"A\",\"name\":\"$RECORDNAME\",\"content\":\"$IP\",\"ttl\":120,\"proxied\":false}"
if [ $? -eq 0 ]; then
/sbin/ddns_custom_updated 1
echo "$DATE: Cloudflare update successful. IP: $IP" >> $LOGFILE
else
/sbin/ddns_custom_updated 0
echo "$DATE: Cloudflare update failed. IP: $IP" >> $LOGFILE
fi

/sbin/ddns_custom_updated 0
(no output)

grep ddns /jffs/syslog.log
(no output)

 

[dave14305]

Have you modified the System Log settings on the router?

 

[BartmanEH]

not that I'm aware of. I installed Asuswrt-Merlin only a few days ago specifically for custom DDNS feature and that's all I've played with
EDIT: isn't syslog in /tmp/?
EDIT2:
grep "ddns" /tmp/syslog.log
Feb 27 09:53:35 ddns: Custom ddns update failed

 

[BartmanEH]

/jffs/scripts/ddns-start <public ip redacted>
admin@RT-AX88U:/tmp/home/root# cat /jffs/scripts/ddns-update.log
2025-02-23 18:06:00: Cloudflare update failed. IP:                    <forgot to provide IP parameter>
2025-02-23 18:07:18: Cloudflare update successful. IP:                <public ip redacted>
2025-02-23 18:13:52: Cloudflare update successful. IP: 8.8.8.8        <tested using dummy IP>
2025-02-23 18:14:17: Cloudflare update successful. IP:                <public ip redacted>
2025-02-23 18:25:16: Error: No IP address parameter provided.         <tested new script with IP parameter check>
2025-02-27 10:12:28: Cloudflare update successful. IP:                <public ip redacted>
admin@RT-AX88U:/tmp/home/root# grep "ddns" /tmp/syslog.log
Feb 27 09:53:35 ddns: Custom ddns update failed
Feb 27 10:12:29 ddns: Completed custom ddns update

 

[BartmanEH]

sometimes when I checkout the DDNS webpage, I see update status:

then I refresh the page and it's gone: