topic Re: RFC1918 - ACL error message in Network Security https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886696#M974888 <HTML><HEAD></HEAD><BODY><P>use normal masks - not reverse masks in pix/asa OS. </P></BODY></HTML> Wed, 19 Sep 2007 12:54:38 GMT srue 2007-09-19T12:54:38Z RFC1918 - ACL error message https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886695#M974885 <P>Attempting to install an ACL on my inside of PIX to deny these RFC1918 (10., 172.16., and 192.168.)addresses from eminating from the inside. </P><P></P><P>Getting this error msg in my console prompt, and have never seen it before. </P><P></P><P>ERROR:IP address,mask (10.0.0.0,0.255.255.255) doesn't pair. </P><P></P><P>PIX 525 running vers 7.2</P> Mon, 11 Mar 2019 11:13:17 GMT https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886695#M974885 dgalati000 2019-03-11T11:13:17Z Re: RFC1918 - ACL error message https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886696#M974888 <HTML><HEAD></HEAD><BODY><P>use normal masks - not reverse masks in pix/asa OS. </P></BODY></HTML> Wed, 19 Sep 2007 12:54:38 GMT https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886696#M974888 srue 2007-09-19T12:54:38Z Re: RFC1918 - ACL error message https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886697#M974891 <HTML><HEAD></HEAD><BODY><P>Thanks, one of the security guys here says the same thing. I was going to try netmasks instead of inverse masks but didn;t...all the doc said to stay with inv masks...thx. </P></BODY></HTML> Wed, 19 Sep 2007 13:07:17 GMT https://community.cisco.com/t5/network-security/rfc1918-acl-error-message/m-p/886697#M974891 dgalati000 2007-09-19T13:07:17Z