9 Oct
2009
9 Oct
'09
11:47 p.m.
On Fri, 2009-10-09 at 16:09 -0400, Dan Christensen wrote:
The very frequent dropped connections don't happen if I don't use TLS. To summarize:
- they happen with TLS to port 143
- they don't happen with a plain connection to port 143
- they don't happen with a TLS connection to port 11143
This clearly indicates some firewall/antivirus/IDS in the middle believing that port 143 only has plaintext traffic and then get entirely confused when they see TLS traffic and at some point decide to kill the connection. I guess using imaps on port 993 would also fix it?