topic Outbound Traffic Source Port 80 in Network Security https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147720#M351816 <P>I have a Web server in my DMZ. Periodically the server sends traffic with source tcp/80 and a random destination tcp port. Is this normal?</P> Tue, 12 Mar 2019 01:29:20 GMT Bill CARTER 2019-03-12T01:29:20Z Outbound Traffic Source Port 80 https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147720#M351816 <P>I have a Web server in my DMZ. Periodically the server sends traffic with source tcp/80 and a random destination tcp port. Is this normal?</P> Tue, 12 Mar 2019 01:29:20 GMT https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147720#M351816 Bill CARTER 2019-03-12T01:29:20Z Outbound Traffic Source Port 80 https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147721#M351817 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>Wouldnt this happen in any situation where the DMZ server is hosting Web/HTTP services to the outside world and someone was connecting to it and loading web page contents?</P><P></P><P>Do you have any logs capture so share with us of the situation?</P><P></P><P>- Jouni</P></BODY></HTML> Tue, 16 Apr 2013 15:10:07 GMT https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147721#M351817 Jouni Forss 2013-04-16T15:10:07Z Outbound Traffic Source Port 80 https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147722#M351818 <HTML><HEAD></HEAD><BODY><P>This sounds like normal behavior as long as there is a packet before the outbound packet from the outside host making a request to your web server on tcp/80.&nbsp; The random high port is the port the requester will listen on for the reply.&nbsp; A packet capture using the ASA packet capture wizard will let you see for sure.</P></BODY></HTML> Tue, 16 Apr 2013 16:10:12 GMT https://community.cisco.com/t5/network-security/outbound-traffic-source-port-80/m-p/2147722#M351818 Benjamin Story 2013-04-16T16:10:12Z