regarding the ephermeral port range

https://stackoverflow.com/a/28576160/1398479

in the instance

ubuntu@ip-10-0-27-206:~$ sudo sysctl -A | grep ip_local_port_range
net.ipv4.ip_local_port_range = 32768	60999
sysctl: reading key "net.ipv6.conf.all.stable_secret"
sysctl: reading key "net.ipv6.conf.br-5d67cea427ee.stable_secret"
sysctl: reading key "net.ipv6.conf.default.stable_secret"
sysctl: reading key "net.ipv6.conf.docker0.stable_secret"
sysctl: reading key "net.ipv6.conf.eth0.stable_secret"
sysctl: reading key "net.ipv6.conf.lo.stable_secret"
sysctl: reading key "net.ipv6.conf.veth274dbd1.stable_secret"
sysctl: reading key "net.ipv6.conf.veth3c7f94a.stable_secret"
sysctl: reading key "net.ipv6.conf.veth9840cab.stable_secret"
sysctl: reading key "net.ipv6.conf.vethd707851.stable_secret"