APLawrence.com -  Resources for Unix and Linux Systems, Bloggers and the self-employed

SME Server Local Networks and VPN's

The SME Server (formerly E-Smith) normally rejects attempt to send mail outside of its own domain if you are connecting from somewhere other than the local lan. This is correct behaviour; otherwise anyone could use your server as a mail relay and you'd become an inadvertent spammer rather quickly.

However, sometimes you have subnets or vpn's that you do want to allow access to. SME Server allows that: you simply use the Administrative browser and add the appropriate network ip's to the Local Networks section. For a vpn connection, that would usually be the private ip address range used such as 10.x.x.x or 192.168.x.x

But VPN's create another problem if they are running over the public internet. The people at the other end will have a routing table that might look something like this:


Destination        Gateway
default            10.0.0.2           
192.168.3.0        192.168.2.1        (your internal network is 192.168.3.0)
 

If their Outlook is set to access "mail.xyz.com", that's going to route through the internet. The access won't be from the 192.168.2.0 network that you said was OK, it will be from the public internet.

The solution is simple: have their Outlook use your internal address. If your server is at 192.168.3.1, that's what they'd put in Outlook. That access will route through the VPN, and all will be well.



Got something to add? Send me email.





(OLDER)    <- More Stuff -> (NEWER)    (NEWEST)   

Printer Friendly Version

-> -> SME Server Local Networks and VPN's




Increase ad revenue 50-250% with Ezoic


More Articles by

Find me on Google+

© Tony Lawrence



Kerio Connect Mailserver

Kerio Samepage

Kerio Control Firewall

Have you tried Searching this site?

Unix/Linux/Mac OS X support by phone, email or on-site: Support Rates

This is a Unix/Linux resource website. It contains technical articles about Unix, Linux and general computing related subjects, opinion, news, help files, how-to's, tutorials and more.

Contact us





Everyone knows that debugging is twice as hard as writing a program in the first place. So if you're as clever as you can be when you write it, how will you ever debug it? (Brian Kernighan)

As an experimental psychologist, I have been trained not to believe anything unless it can be demonstrated in the laboratory on rats or sophomores. (Steven Pinker)







This post tagged: