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If you go to <a href="http://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/SearchBySoftware.jsp" rel="ugc">http://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/SearchBySoftware.jsp</a>&nbsp;and select Image Name and but in c1841-broadband-mz.151-4.m<wbr />6.bin it looks like ZBFW is supported.<br />
See attachment.<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/09_w39/1196781/Cisco-Feature-Navigator.jpg" target="_blank" class="file-inline" title="Cisco Feature Navigator (173 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>Cisco-Feature-Navigator.jpg</a>
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If you go to http://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/SearchBySoftware.jsp [http://cfn.cloudapps.cisco.com/ITDIT/CFN/jsp/SearchBySoftware.jsp] and select Image Name and but in c1841-broadband-mz.151-4.m6.bin it looks like ZBFW is supported.
See attachment.
Cisco-Feature-Navigator.jpg [https://filedb.experts-exchange.com/incoming/2017/09_w39/1196781/Cisco-Feature-Navigator.jpg]

Cisco-Feature-Navigator.jpg

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I have a cisco 1841 router with Cisco IOS Software (C1841-BROADBAND-M), Version 15.1(4) M6, <br />
My issue is that the command zone is not available in global configuration.<br />
As per my knowledge the image is supporting ZBFW.<br />
Does anybody know what I'm doing wrong.
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I have a cisco 1841 router with Cisco IOS Software (C1841-BROADBAND-M), Version 15.1(4) M6, 
My issue is that the command zone is not available in global configuration.
As per my knowledge the image is supporting ZBFW.
Does anybody know what I'm doing wrong.

Zone Based Firewall

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).