UDP NAT Reflection seems to be the culprit, but I am unsure how to fix it!
TWiST last edited by
Ok so I have Pfsense 1.01 its been working fine for a longtime, but recently I have noticed some strange issues. It started with me being unable to connect to mail.mydomain.com on HTTPS 443, externalley every1 could connect just fine but I was unable to connect to it locally, I figured out what was causing it, I had TCP and UDP enabled for it and when I removed UDP ( which is not needed for 443) it started working just fine. Now I am having the same issue with SMTP port 25 I am able to externalley telnet to port 25 and recieve a connection but localley its a no go to the domains I am hosting, I am pretty sure from all the reading I have been doing that its a UDP NAT reflection issue, but I really dont know how to go about fixing it. I disabled UDP for 25 and it dosent make a diffrence I am still unable to connect to it. Other then this I only have 1 other small issue with Pfsense. If any1 has any insight on to how I can get my smtp to connect localley for a domain I am hosting I would greatly appreciate it.
I removed UDP for SMTP port 25 which like serveral websites said I needed UDP for it and now its working. Is this a UDP reflections issue ? I am just trying to learn more at this point.
jeroen234 last edited by
pfsense don't have udp reflection only tcp reflection
hoba last edited by
udp reflection should work, the problem seems to be when using a single rule with "tcp/udp". We need to check this.