Port 465 connection issue to Gmail

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SepticSceptic

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#171790 1-May-2015 09:51

Have a site that doesn't seem to be able to connect to gmail via SSL port 465.

They are using a photocopier for scan to email, and was working OK until they changed to Spark VDSL, and a Huawei HG659b modem/router

The scan to email account is valid, and can be logged into via desktop web browser.

using smtp.gmail.com. port 465, SSL.

However, using a SSL SMTP checker on a couple of the customer's desktop PC's, configured with the same account and SSL settings, it will show a refused /blocked connection, and will not connect to smtp.gmail.com.

Spark have not been able to assist, they did make a couple of recommendations, such as using gmails DNS, but they seem stuck as well.

I thought about adding a port forward, but that shouldn't be necessary as outbound connections are forwarded, and routed back, however, happy to be proven wrong ...

Should I add a port forward ?

Cheers

muppet

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#1294832 1-May-2015 09:58

As you've already figured out, port forward won't help for outbound connections, only inbound (i.e. if you needed gmail to connect to your printer)

This sounds like either:

a) Gmail is blocking connections from that IP.
b) Spark are blocking port 465 outbound (unlikely)
c) Something's wrong/misconfigured on your router (can't think what it would be though)

If you get really stuck, Wireshark an attempt from a failing PC and put it somewhere for us to look at.

SepticSceptic

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#1305986 15-May-2015 17:21

Update to this - seems that the customer's modem was picking up a blacklisted IP address at every reboot. The first time boot worked OK, hence why everything worked. But after the first reboot, nah, IP on the blacklist.

In the end, Spark techie has assigned the customer a public facing static IP address, outside the blacklisted IP range, for their modem, and all has been working fine since ( last 10 or so days).

Thanks muppet, it was possibly a lightbulb moment ..:-)