Listening on localhost - cannot connect to host using port 3010

Applications UNIX Desktop Questions & Answers
1

Hi Guys,

my issue is - I have people connecting to my hosts from the outside world (for POC testing). There application listens on a port 3010 which is bound to the localhost. Using netstat -an | grep LISTEN it is the only port that is bound - ie: ftp, ssh etc listen on all interfaces. I need to be able to connect via other hosts, is there anyway i can get that port to listen on all interfaces?

Thanks

2

You have to make sure you are binding the socket to "any". For instance, in C:

server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = htonl(INADDR_ANY);
bind(sock, (struct sockaddr *) &server_address, sizeof(server_address))

or in PERL:

my $proto = getprotobyname('tcp');

socket(Server, PF_INET, SOCK_STREAM, $proto)               || die "socket: $!";
setsockopt(Server, SOL_SOCKET, SO_REUSEADDR, pack("l", 1)) || die "setsockopt: $!";
bind(Server, sockaddr_in($lport, INADDR_ANY))              || die "bind: $!";
listen(Server,SOMAXCONN)                                   || die "listen: $!";

JAVA is left as an exersize for the student :-).