dguillen
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Access our public email server from internal network?
We are using Netmail for our email, POP/SMTP server. Our users connect to it internally with internal IP, and externally with public IP in outlook. Problem is our mobile users that have Outlook configured to use public IP for POP/SMTP can't connect to email server when they are internally plug in to internal network.
I have a Watchguard x700 firewall.
I need to allow users to connect internally to mail server using our Public IP.
I tried using DNS (eg. mail.xxx.com) but our public dns mail records point to our domain provider and not our public ip.
I have a Watchguard x700 firewall.
I need to allow users to connect internally to mail server using our Public IP.
I tried using DNS (eg. mail.xxx.com) but our public dns mail records point to our domain provider and not our public ip.
ASKER CERTIFIED SOLUTION
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The problem is the firewall either doesn't support or has been enabled so that the external IP can be accessed from the internal network. This is called loopback.
If the firewall doesn't support loopback (contact watchguard) you could use multinetwork manager and set it up so that when you are internal, there is a host name that points to the internal ip, and when your external, that host name points to the external ip. Then use the hostname in the mail settings.
setup a dns record called gw.xxx.com with the external ip.
use this name in outlook
use MNM so that when you are internal gw.xxx.com points to the internal ip.
the host file is stored in c:\windows\system32\driver s\etc.
you can either use hosts or lmhosts. Both do the same thing except lmhosts has more options for this hosts would be OK.
If the firewall doesn't support loopback (contact watchguard) you could use multinetwork manager and set it up so that when you are internal, there is a host name that points to the internal ip, and when your external, that host name points to the external ip. Then use the hostname in the mail settings.
setup a dns record called gw.xxx.com with the external ip.
use this name in outlook
use MNM so that when you are internal gw.xxx.com points to the internal ip.
the host file is stored in c:\windows\system32\driver
you can either use hosts or lmhosts. Both do the same thing except lmhosts has more options for this hosts would be OK.
He could also write a logon script which can change his/her host/lmhost file at logon time ;)
ASKER
thanks for all the feedback guys.
Registering a DNS name for xx..xx.com is probably the way to go with this. Watchguard already told me it doesn't support "loopback" and it won't ever work internally.
I will try it this week and post results.
Registering a DNS name for xx..xx.com is probably the way to go with this. Watchguard already told me it doesn't support "loopback" and it won't ever work internally.
I will try it this week and post results.
check this link for common problems you can probably face.
http://p6drad-teel.net/~windo/doc/NAT/