Answer by Zakaria for Testing UDP port connectivity
You can check a specific UDP port using the following command:nmap <hostname or ip> -sU -pU:<UDP port>
View ArticleAnswer by Oleg Neumyvakin for Testing UDP port connectivity
Actually if Server listen port 6111 netcat explicitly states it:# nc -ul 6111Ncat: bind to :::6111: Address already in use. QUITTING.
View ArticleAnswer by David Waddell for Testing UDP port connectivity
I have a simple-minded approach. If the UDP server does not return expected data, I just stop collecting dgrams, assuming it went down:LINE: while(1){ my $line; my $flags; local $SIG{ALRM} = sub {die...
View ArticleAnswer by Koray Güclü for Testing UDP port connectivity
You can scan udp ports by using following commandnmap -sU -v <hostname or ip>
View ArticleAnswer by Sasha for Testing UDP port connectivity
both on client ans server install nc:yum install nc (for centos)on server listen UDP port: nc -ul 6111 (add the -6 option if you're testing an ipv6 connection)on client nc -u <server> 6111type...
View ArticleAnswer by motobói for Testing UDP port connectivity
To test if udp port is responding, use netcat.An example from the man page:nc -v -u -z -w 3 example.host 20-30 Send UDP packets to ports 20-30 of example.host, and report which ones did not respond...
View ArticleAnswer by tmarkiewicz for Testing UDP port connectivity
I was having a similar issue and found a good solution using netcat here: http://en.wikipedia.org/wiki/Netcat#Test_if_UDP_port_is_open:_simple_UDP_server_and_clientnc -vzu <host> <port>I...
View ArticleAnswer by Luke404 for Testing UDP port connectivity
There is no such thing as an "open" UDP port, at least not in the sense most people are used to think (which is answering something like "OK, I've accepted your connection"). UDP is session-less, so "a...
View ArticleAnswer by ewwhite for Testing UDP port connectivity
You can do this with netcat (nc) or iperf, assuming you have another machine to test with outside the network. My choice would be an nmap UDP scan from a system outside of your environment. What was...
View ArticleAnswer by womble for Testing UDP port connectivity
Testing open UDP ports with nmap is fraught with perils -- there's no three-way handshake to indicate openness. Unless the listening process responds to whatever nmap sends, there's no way for nmap to...
View ArticleTesting UDP port connectivity
I am trying to test whether I can get to a particular port on a remote server (both of which I have access to) through UDP.Both servers are internet facing.I am using netcat to have a certain port...
View ArticleAnswer by kholis for Testing UDP port connectivity
According to @Zakaria and @Koray answers. Here is what works for me:On Connected port, state value is open: $ sudo nmap -sU -pU:53 192.168.1.1 PORT STATE SERVICE 53/udp open domainOn Disconnected port,...
View Article
