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No matter how much protection you put on your network, somebody is bound to get around it somehow. We were recently blocked from sending mail to anybody that used GoDaddy as a mail server. Apparently, a user of ours connected to our network with their laptop with something allowing their laptop to be used as a spam server. <br />
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As a result, I'd like to block all outgoing SMTP (Port 25) traffic on our network, accept of course for our legit mail servers. I'm not that familiar with the command line interface on these devices. How would I go about doing that?<br />
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Thanks<br />

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No matter how much protection you put on your network, somebody is bound to get around it somehow. We were recently blocked from sending mail to anybody that used GoDaddy as a mail server. Apparently, a user of ours connected to our network with their laptop with something allowing their laptop to be used as a spam server. 

As a result, I'd like to block all outgoing SMTP (Port 25) traffic on our network, accept of course for our legit mail servers. I'm not that familiar with the command line interface on these devices. How would I go about doing that?

Thanks


Cisco Pix 515E - Block outbound SMTP

Software firewalls, also known as host-based firewalls, provide a layer of software on one host that controls network traffic in and out of that single machine. Most operating systems now include firewall software, but many available software firewalls include central distribution, antivirus systems and disaster recovery.