PORT233 NETWORK TROUBLESHOOTING WORKSHEET
https://www.port233.com/guides/troubleshooting-slow-internet
Updated: 2026-10-06 | Publisher: Port233 LTD

Keep this locally and share only with the support team handling your issue.
Do not include passwords, Wi-Fi keys, router logins, or account credentials.

1. DESCRIBE THE PROBLEM
What fails or slows down:
When it began (include timezone):
Affected devices, rooms, and services:
Does it happen continuously or at particular times?
Broadband provider and package:
Provider incident/status reference, if any:

2. RECORD A BASELINE BEFORE RESTARTING EQUIPMENT
Date, time, and timezone:
Device and browser:
Connection: Ethernet / Wi-Fi / mobile
Room and access point (if known):
VPN/proxy active (if required, leave it enabled):
Other network activity (uploads, backups, streaming):
Download (Mbps):
Upload (Mbps):
Latency (ms):
Jitter (ms):
Public IP and provider/ASN (optional; share privately):
Was any lookup or test unavailable? Record its error:

3. CHANGE ONE CONDITION AND REPEAT
What changed (for example, Ethernet instead of Wi-Fi):
Date, time, and timezone:
Download (Mbps):
Upload (Mbps):
Latency (ms):
Jitter (ms):
Did the original symptom improve?
Did it return when the original condition was restored?

4. HAND OVER THE EVIDENCE
Checks already completed:
Any settings changed and whether they were restored:
Result before and after any restart:
Provider status or error message:
Best time for support to reproduce the issue:

Interpretation: these are browser-to-test-endpoint measurements. They are
snapshots, not a line-speed guarantee, packet-loss test, or full network audit.
Guide and measurement details: https://www.port233.com/about#methodology
Support: support@port233.com