Firewall blocking a remote connection — how to tell
You don't need to know how to configure a firewall to recognize it's behind a connection problem — a few signs are usually enough.
What to check
The connection hangs and then times out
If a connection attempt takes a long time to load and eventually shows a timeout message, that's a common symptom of a firewall or antivirus program blocking it, rather than a problem with the remote access app itself.
It works on one network but not on another
If the same connection succeeds on home Wi-Fi but fails on the office network (or the other way around), that's a strong sign that one of those networks has stricter firewall settings.
IT mentions a "port" or a "firewall exception"
If those words come up when talking to your IT provider, it's a sign the problem really is on the firewall side, not in the settings of the computer or app itself.
Your antivirus shows a notification about a blocked connection
Some antivirus programs come with their own built-in firewall and will notify you about a blocked app — it's worth reading those notifications instead of dismissing them right away.
Why we leave this part to IT
Opening ports or adding firewall exceptions is a change that, if done wrong, can weaken the security of the whole company network rather than just fixing one connection problem. So recognizing the symptoms is yours to do — the actual configuration belongs to IT.
When it's a job for IT
- You recognize one of the signs above and suspect a firewall
- Your IT provider has asked you to open a port or add a firewall exception
- The connection works on one network but consistently fails on another
- Your antivirus regularly blocks the remote access program
Want us to check it with you?
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