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I have literally just encountered this using free hospital WiFi. Ports 80 and 443 open but ssh, SMTP and IMAP are all silently dropped. Workaround is to tunne
by dingaling 10y ago
I have literally just encountered this using free hospital WiFi. Ports 80 and 443 open but ssh, SMTP and IMAP are all silently dropped.
Workaround is to tunnel those over 80 which in turn reinforces the dominance of web ports.
- kazinator 10y agoISP blocking of port 25 significantly curtails the spam problem. Imagine if every subscriber could connect to any SMTP server in the world and send an e-mail. I agree that too aggressive port blocking is a problem, though.