topic Re: Error message in Network Security https://community.cisco.com/t5/network-security/error-message/m-p/880362#M973960 <HTML><HEAD></HEAD><BODY><P>Hi </P><P></P><P>Better late than never <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P><P></P><P>I believe Vista runs IPv6 by default so that would explain it. </P><P></P><P>Jon</P><P></P><P></P></BODY></HTML> Mon, 07 Jan 2008 15:08:34 GMT Jon Marshall 2008-01-07T15:08:34Z Error message https://community.cisco.com/t5/network-security/error-message/m-p/880359#M973957 <P>My ASA 5510 constantly receives the following message, hundreds in a day.</P><P>Does anyone know what this message means?</P><P>Thank you! </P><P></P><P>&lt;163&gt;:Oct 04 14:22:31 EDT: %ASA-session-3-305006: regular translation creation failed for protocol 41 src inside:192.168.1.73 dst outside:208.79.78.230</P> Mon, 11 Mar 2019 11:20:58 GMT https://community.cisco.com/t5/network-security/error-message/m-p/880359#M973957 davidwu2007 2019-03-11T11:20:58Z Re: Error message https://community.cisco.com/t5/network-security/error-message/m-p/880360#M973958 <HTML><HEAD></HEAD><BODY><P>Hi David</P><P></P><P>Protocol 41 is used by IPv6. So for IPv6 to get across the IPv4 internet it needs to encapsulate the IPv6 packet inside an IPv4 packet and for this it uses protocol 41.</P><P></P><P>However if you are using PAT on your firewall then it will not be able to do a translation for this because there are not any TCP/UDP port numbers. </P><P></P><P>It may be harmless, it may not. What is the host 192.168.1.73 and does it have any IPv6 software running on it ?</P><P></P><P>HTH</P><P></P><P>Jon</P></BODY></HTML> Thu, 04 Oct 2007 17:47:11 GMT https://community.cisco.com/t5/network-security/error-message/m-p/880360#M973958 Jon Marshall 2007-10-04T17:47:11Z Re: Error message https://community.cisco.com/t5/network-security/error-message/m-p/880361#M973959 <HTML><HEAD></HEAD><BODY><P>Hi Jon,</P><P></P><P>Sorry, I don't see your message until now.</P><P>Host 192.168.1.73 is a Windows Vista machine.</P><P></P><P>Thanks!</P></BODY></HTML> Mon, 07 Jan 2008 15:02:35 GMT https://community.cisco.com/t5/network-security/error-message/m-p/880361#M973959 davidwu2007 2008-01-07T15:02:35Z Re: Error message https://community.cisco.com/t5/network-security/error-message/m-p/880362#M973960 <HTML><HEAD></HEAD><BODY><P>Hi </P><P></P><P>Better late than never <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span></P><P></P><P>I believe Vista runs IPv6 by default so that would explain it. </P><P></P><P>Jon</P><P></P><P></P></BODY></HTML> Mon, 07 Jan 2008 15:08:34 GMT https://community.cisco.com/t5/network-security/error-message/m-p/880362#M973960 Jon Marshall 2008-01-07T15:08:34Z Re: Error message https://community.cisco.com/t5/network-security/error-message/m-p/880363#M973961 <HTML><HEAD></HEAD><BODY><P>Thanks Jon,</P><P></P><P>My only concern now is that why Ip address 208.79.78.230 keeps trying to connect to outside</P><P>from the Vista machine.</P></BODY></HTML> Mon, 07 Jan 2008 16:32:10 GMT https://community.cisco.com/t5/network-security/error-message/m-p/880363#M973961 davidwu2007 2008-01-07T16:32:10Z