Re: Unable to listen properly on UDP port 4500

Thanks and noted. Definitely not a masochist... I will adjust my ports accordingly. Cheers! Chris On 2020/12/8 16:29, Philip Guenther wrote: : bleys; grep 4500 /etc/services ipsec-nat-t     4500/tcp        ipsec-msft      # IPsec NAT-Traversal ipsec-nat-t     4500/udp        ipsec-msft      #

Re: Unable to listen properly on UDP port 4500

: bleys; grep 4500 /etc/services ipsec-nat-t 4500/tcpipsec-msft # IPsec NAT-Traversal ipsec-nat-t 4500/udpipsec-msft # IPsec NAT-Traversal : bleys; sysctl net.inet.esp.udpencap net.inet.esp.udpencap=1 : bleys You're trying to use the ipsec ESP encapsulation port,

Unable to listen properly on UDP port 4500

Hello All, I am unable to set up a localhost netcat listener on UDP port 4500 that responds to a client on that same host. I encountered this issue attempting to test whether UDP 4500 was open on our departmental firewall. Simple test case: Fresh build of OpenBSD 6.8. No local network, no pa