#Network Troubleshooting

• Generally curl will be needed for much of the troubleshooting
• For SSL then openssl will be needed for troubleshooting

#SSL Issues

• curl does not validate SSL certificates like *Arrs do, so openssl needs to be used

• Test the connection/site using openssl to see if the certificates are valid

openssl s_client -showcerts -connect <url>:443

#Not connectable IPv6 IP

• Test connecting with curl

curl -sv -6 "http://<url>:<port>/"

#Windows Check Ports In Use

• Use netsh to get a list of ports in use and what is using them

netstat -ab

#Windows Check URL Reservations

• Use netsh to get a list of what ports and urls apps are bound to and listening on

netsh http show urlacl

#Windows Creating URL Reservations

• Use netsh to create the urlacl - the below example is for radarr which uses port 7878

http add urlacl http://*:7878/ sddl=D:(A;;GX;;;S-1-1-0)

#Linux Check Ports in Use

• Use netstat to locate ports in use / what port an app is on

sudo netstat -tnlp | grep <:port or app>

#Examples

• Port 8989

sudo netstat -tnlp | grep ':8989'

• App named Radarr

sudo netstat -tnlp | grep 'Radarr'