network
some network tips
use a different ip address on a curl
command
to use 127.0.0.1
instead the real ip address of docs.rda.run
curl --resolve docs.rda.run:443:127.0.0.1 https://docs.rda.run
download ssl certificate
echo quit | openssl s_client -showcerts -servername docs.rda.run -connect docs.rda.run:443 > site-cert.pem
to use this cert on curl
curl --cacert site-cert.pem https://docs.rda.run
to use this cert on wget
wget --ca-certificate=site-cert.pem https://docs.rda.run
verify network throughput between two servers
on server 01
iperf3 -s
on server 02
iperf3 -c <IP_SERVER_01> -p 5201
list all ipv4 address of a network
nmap -sn 172.17.3.0/24 | grep -B 1 'Host is up' | grep -oE '[[:digit:]]{1,}\.[[:digit:]]{1,}\.[[:digit:]]{1,}\.[[:digit:]]{1,}'
telnet with timeout
# echo quit | timeout --signal=9 3 telnet [HOST] [PORT]
$ echo quit | timeout --signal=9 3 telnet rda.run 6969
Trying 172.217.28.14...
Killed
using curl to calculate website load time
curl -o /dev/null -s -w %{time_total}\\n https://rda.run
0,536215 # Resposta (em segundos)
you can get some other infos too.
curl -o /dev/null -s -w {time_connect}:%{time_starttransfer}:%{time_total}\\n https://rda.run
# connection time : transfer start : total time in seconds
0,035299:0,151648:0,157692
port redirect on windows 10
use powershell as admin:
netsh interface portproxy add v4tov4 listenport=80 listenaddress=127.0.0.1 connectport=80 connectaddress=192.168.99.100
to test if the rule was applied:
netsh interface portproxy show all
to remove the rule:
netsh interface portproxy delete v4tov4 listenport=80 listenaddress=127.0.0.1
resume a curl download
curl -C - -o arquivo_ja_salvo 'www.example.com/caminho/do/arquivo_ja_salvo'