nanog mailing list archives
Re: Customer-facing ACLs
From: Andy Dills <andy () xecu net>
Date: Mon, 10 Mar 2008 20:12:25 -0400 (EDT)
On Tue, 11 Mar 2008, Ang Kah Yik wrote:
Hi Justin (and all others on-list) I understand your grounds for blocking outbound SMTP for your customers (especially those on dynamic IP connections). It probably will do good to block infected customers that are spewing spam all over the world. However, considering the number of mobile workers out there who send email via their laptops to corporate SMTP servers, won't blocking outbound SMTP affect them? Since these corporate types (I'm guessing here) are probably unaware of how to change their email client's SMTP configurations, chances are that blocking outbound SMTP will probably cause quite a lot of pain. After all, there are also those who frequently move from place to place so they're going to have to keep changing SMTP servers every time they go to a new place that's on a different ISP.
For what it's worth, that's what port 587 was created for. And wouldn't those corporate types require VPN to access the network? On top of that, most who "block" 25 don't block it but direct it to internal mail servers where it can be subjected to limits and filtering. Andy --- Andy Dills Xecunet, Inc. www.xecu.net 301-682-9972 ---
Current thread:
- RE: Customer-facing ACLs, (continued)
- RE: Customer-facing ACLs Scott Weeks (Mar 07)
- Re: Customer-facing ACLs Justin Shore (Mar 07)
- Re: Customer-facing ACLs Adrian Chadd (Mar 07)
- Re: Customer-facing ACLs Justin Shore (Mar 07)
- RE: Customer-facing ACLs Paul Ferguson (Mar 07)
- Re: Customer-facing ACLs Scott Weeks (Mar 10)
- Re: Customer-facing ACLs Sean Donelan (Mar 10)
- RE: Customer-facing ACLs Frank Bulk - iNAME (Mar 10)
- Re: Customer-facing ACLs Sean Donelan (Mar 10)
- Re: Customer-facing ACLs Scott Weeks (Mar 10)
- Re: Customer-facing ACLs Sean Donelan (Mar 10)
- Customer-facing ACLs Ang Kah Yik (Mar 10)
- Re: Customer-facing ACLs Andy Dills (Mar 10)
- Re: Customer-facing ACLs Ang Kah Yik (Mar 10)
- RE: Customer-facing ACLs Frank Bulk - iNAME (Mar 10)
- Re: Customer-facing ACLs JC Dill (Mar 10)
- Re: Customer-facing ACLs Andy Dills (Mar 10)
- RE: Customer-facing ACLs Scott Weeks (Mar 07)
- Re: Customer-facing ACLs Christopher Morrow (Mar 10)
- Re: Customer-facing ACLs Justin Shore (Mar 10)
- RE: Customer-facing ACLs Sean Donelan (Mar 11)