irlue to send the logs to remote server using port number will use which protocol by default TCP/UDP

syslog server is listenting on port 518 and its pinging from F5 .

Also the irule is configured to send logs to two remote servers , one will use the default port and to the other server using 518 . below is the irule

when SERVER_CONNECTED { log x.x.x.x local0.info "client: [IP::client_addr]:[TCP::client_port] -> VIP: [clientside {IP::local_addr}]:[clientside {TCP::local_port}] -> Node: [IP::server_addr]:[TCP::server_port]" log x.x.x.x:518 local0.info "client: [IP::client_addr]:[TCP::client_port] -> VIP: [clientside {IP::local_addr}]:[clientside {TCP::local_port}] -> Node: [IP::server_addr]:[TCP::server_port]" }

Remote logging happening to first server using the default port . But to 2nd server logs are not reaching

So do we need to check the remote syslog server to see syslog service is running fine .