Endian Community - SMTP problem?

[Guest]

[paulohm1]

I just yesterday set up our Endian Community edition on a Linux box in our office. I have outgoing firewall port 80 and 443 not allowed, to force traffic to go through the proxy. I have enabled the proxy (not transparent) on the green network, and configured all the workstations to connect to the internet through the proxy. Everything seems to work fine in that area.

My one problem is on some of the workstations (2 out of 15), Outlook is unable to send email. It gives me an error saying that it could not connect to the smtp server...

I am confused as to why this would be causing problems because in the Endian firewall configuration, the outgoing firewall explicitly permits port 25 (smtp) to proceed. Everything else works fine as well. It seems as though this might be a Windows/Outlook problem as it is only applying to a  computers, but I figured any help would be much appreciated. Are there any settings in Outlook that would require additional configuration to allow the smtp traffic through?

Thanks,
Paul

[Steve]

If 2 computers can send mail but 13 can't, what is different on those 2 computers?
Are they on the same subnet?, do they have the same gateway? etc..

[paulohm1]

Actually, it was the other way around, all but 3 computers were able to send email. All of the server settings inside Outlook are the same, I just can't figure this out for the life of me. To correct what I said earlier, Outlook says that it is able to contact the smtp server, but does not receive a response from it, as if endian is blocking it on the way back...

My set up is like this.

T1 line comes into our office through a company-installed cisco router. That router then goes to our own Cisco ASA 5510. Off of that, we have our DMZ which has an IPCop box, and it has our inside subnet which has the Endian firewall first, then going to a switch where all the workstations are connected. Everything has worked fine just having the cisco ASA go straight to the switch, but I liked some of the additional content filtering/ proxy features that Endian provides, so I figured another layer of security would be good.

Another problem is that I cant get from the inside (behind the Endian firewall) to our DMZ on the Cisco ASA whereas without the Endian, I was able to fine. I am thinking that I may have to set up a static route for that, but am not sure where I would do that in Endian. As for the SMTP, I just can't figure out why Endian seems to block only outgoing email but only for a few computers...

Any additional insight?

[paulohm1]

I tried adding a static route using root on the CLI using this command: route add -net 10.10.5.0 netmask 255.255.255.0 gw 192.168.4.1

Where 10.10.5.0 is the dmz network of the cisco router that I want to reach, and 192.168.4.1 is the address of the inside interface of the cisco router (ie, the gateway for the endian machine).

Am I entering this correctly? Is there a way to add static routes using the GUI with the community version?

Thanks,
Paul

[redespanama]

I also I have this problem, I think it is because the version of Microsoft Outlook, I have a network of 48 computers between mac and pc. And only 5 teams do not send emails remain suspended, release a rule of 1:65000 and email after shipping. Indicates that the Outlook 2010 uses another port in addition to the normal 25 110 143 993 995

[kashifmax]

Hmmm. First check where the outlook is connecting, if it is connecting outside (external) than there is a specific port like 25, 995, 143 etc., but if the outlook is connecting to exchange server than none of them ports are used. Its uses MAPI extension by default (cache mode) as I know in exchange 2003...

If the 2 computers can send mails and others can't than compare the configuration (Client/EFW/Server) of working and not working outlook client.

[kashifmax]

Also check this link...
http://www.efwsupport.com/index.php?topic=3107.msg8444