curl -s -I -HHost:httpbin.example.com "http://$INGRESS_HOST:$INGRESS_PORT/status/200"curl -s -H 'X-Canary: always' -HHost:app.example.com "http://192.168.0.184:30988/"while(true)
do curl -HHost:app.example.com "http://192.168.0.184:30988/"
sleep 0.5
done
https://istio.io/latest/docs/tasks/traffic-management/ingress/ingress-control/
WHY?
– If telnet command is not present on system
– Easy to use
BASH:
ECHO:
#1
echo > /dev/tcp/192.168.0.183/22
#2
echo > /dev/tcp/192.168.0.183/22 && echo "open"
#3
echo > /dev/tcp/192.168.0.183/22 && echo "open" || echo "close"
#4
(echo > /dev/tcp/192.168.0.183/22) > /dev/null 2>&1 && echo "open" || echo "close"CAT:
cat < /dev/tcp/192.168.0.183/22
CURL:
curl -v telnet://192.168.0.183:22curl -v telnet://hackfi.initedit.com:80