ISPmanager unavailable — what to check

Summary

If the ISPmanager panel doesn't open at https://IP:1500: check the service, port, license, and available memory.

Applies to:
✔ VPS
✔ Dedicated servers
✔ ISPmanager 5/6

Step 1: check service status

systemctl status ispmgr

If not running:

systemctl start ispmgr

tail -50 /usr/local/mgr5/var/ispmgr.log

Step 2: check port 1500

ss -tlnp | grep 1500

iptables -L -n | grep 1500

If blocked:

iptables -A INPUT -p tcp --dport 1500 -j ACCEPT

Step 3: check license

/usr/local/mgr5/sbin/licctl info ispmgr

Step 4: check memory

free -m

ps aux --sort=-%mem | head -10

Step 5: check disk

df -h

Restart ISPmanager

systemctl restart ispmgr

Verification

Open in browser:

https://SERVER_IP:1500

If the panel won't start after all checks, open a support ticket. Include:
- output of systemctl status ispmgr
- last 50 lines of /usr/local/mgr5/var/ispmgr.log
- output of licctl info ispmgr