Rob, You might use iptables if your Listserv is running Unix/Linux. Bob From: LISTSERV site administrators' forum [mailto:[log in to unmask]] On Behalf Of Wideman, Robert - Ellucian <[log in to unmask]> Sent: Tuesday, August 14, 2012 6:19 AM To: [log in to unmask] Subject: can I restrict what addresses the server will listen to? We are installing a new Listserv and the new server will reside behind our spam filters (and is working well.) I understand that I can restrict access to the server with firewalls and such, but is there a command I can use to tell the listserv to only accept connections on port 25 from a specific list of IP addresses? I will use a non standard port for communication between the spam filters and the listserv if I have to and it is the only option, but I would rather not. Rob Wideman * A+, Network+, HP Procurve ASE, Cisco CCNA, Dell Compellent CSA * Network Analyst * Delta College * Ellucian * 1961 Delta Road, University Center MI 48710 * Tel 989-686-9177 * Fax 989-667-2201 * [log in to unmask]<mailto:[log in to unmask]> * www.ellucian.com<http://www.ellucian.com/> CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system. Thank you. [Description: Description: cid:3331097758_10675762] ________________________________ To unsubscribe from the LSTSRV-L list, click the following link: http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1 ############################ To unsubscribe from the LSTSRV-L list: write to: mailto:[log in to unmask] or click the following link: http://peach.ease.lsoft.com/scripts/wa-PEACH.exe?SUBED1=LSTSRV-L&A=1