Adding entire network to IP whitelist

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Adding entire network to IP whitelist

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Adding entire network to IP whitelist - 7.Aug.2008 11:41:10 AM

Ytsejamer1

Posts: 136
Joined: 7.Mar.2006
Status: offline

So we use UPS for a lot of our shipping needs at my company and a few of them have been blocked. They have an entire class B network (153.2.x.y) for their company. Anyways, I'd like to add the entire network to our IP whitelist...but I can't seem to understand how the IP whitelist Group of Computers option is supposed to be configured so that the entire block can be whitelisted. I'd like to whitelist teh entire range 153.2.0.0 to 153.2.255.255.

Can someone assist with this? Thanks!

Post #: 1

RE: Adding entire network to IP whitelist - 7.Aug.2008 1:09:23 PM

RSP

Posts: 1447
Joined: 31.Oct.2006
From: The East Riding of Yorkshire, UK
Status: offline

Use subnet address 153.2.0.0 and subnet mask of 255.255.0.0

(in reply to Ytsejamer1)

Post #: 2

RE: Adding entire network to IP whitelist - 7.Aug.2008 2:31:03 PM

John Letourneau

Posts: 1669
Joined: 28.Apr.2008
Status: offline

Ytsejamer1,

If any of your external mail passes through one of these devices before making it to GFI MailEssentials this configuration could introduce a great amount of spam into your organization.

_____________________________

John Letourneau
GFI Software
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(in reply to RSP)

Post #: 3

RE: Adding entire network to IP whitelist - 7.Aug.2008 4:02:37 PM

Ytsejamer1

Posts: 136
Joined: 7.Mar.2006
Status: offline

RSP...thanks...i did that about half hour after this post. Right on...

John...what device are you referring to that our external mail would go through?

(in reply to John Letourneau)

Post #: 4

RE: Adding entire network to IP whitelist - 7.Aug.2008 10:21:24 PM

John Letourneau

Posts: 1669
Joined: 28.Apr.2008
Status: offline

Ytsejamer1,

If a message happened to come from the internet and be directed through a server on your network to your Exchange server (where ME12 is possibly installed with the entire network whitelisted via IP) this message would be delivered to your users Inbox.

_____________________________

John Letourneau
GFI Software
Blog-Twitter-YouTube-Facebook

(in reply to Ytsejamer1)

Post #: 5

RE: Adding entire network to IP whitelist - 8.Aug.2008 2:07:28 PM

Ytsejamer1

Posts: 136
Joined: 7.Mar.2006
Status: offline

we didn't whitelist our network IP... I just had to add an external source's IP block so their email can come in without being blocked. Now, if one of their computers relays spam, then yes...we might be in trouble!

(in reply to John Letourneau)

Post #: 6