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Full Discussion: Ports open on solaris/linux
Special Forums Cybersecurity Ports open on solaris/linux Post 302316119 by woofie on Thursday 14th of May 2009 06:15:11 AM
Old 05-14-2009
Don't quote me (and don't know if it'll help to much) but I think if I remember correctly it has port 1720 is some kind of VoIP, maybe that was on a Windows system.
~~~~~

OK had me thinking if I remembered correctly and I found the following information from http://www.voipvoice.com/faq.html (hope it's OK to post the link Smilie ) - it's the 3rd last question asked and might provide you with a little more information.

For H.323 (MS Netmeeting etc…)

* TCP port 1720 (H.225 call signalling for hosts)
* TCP ports 11000 to 65535 (H.245 capability exchange)
* UDP ports 16384 to 32767 RTP audio stream)

For H.323 (Callserve)

* UDP port 1719 (Callserve signalling)
* TCP port 1720 (Callserve signalling)
* UDP ports 5000 to 65535 (RTP audio stream)

Last edited by woofie; 05-14-2009 at 07:18 AM.. Reason: More information.
 

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UDP(4)							   BSD Kernel Interfaces Manual 						    UDP(4)

NAME
udp -- Internet User Datagram Protocol SYNOPSIS
#include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> int socket(AF_INET, SOCK_DGRAM, 0); DESCRIPTION
UDP is a simple, unreliable datagram protocol which is used to support the SOCK_DGRAM abstraction for the Internet protocol family. UDP sockets are connectionless, and are normally used with the sendto(2) and recvfrom(2) calls, though the connect(2) call may also be used to fix the destination for future packets (in which case the recv(2) or read(2) and send(2) or write(2) system calls may be used). UDP address formats are identical to those used by TCP. In particular UDP provides a port identifier in addition to the normal Internet address format. Note that the UDP port space is separate from the TCP port space (i.e., a UDP port may not be ``connected'' to a TCP port). In addition broadcast packets may be sent (assuming the underlying network supports this) by using a reserved ``broadcast address''; this address is network interface dependent. Options at the IP transport level may be used with UDP; see ip(4). MIB VARIABLES
The udp protocol implements a number of variables in the net.inet branch of the sysctl(3) MIB. UDPCTL_CHECKSUM (udp.checksum) Enable udp checksums (enabled by default). UDPCTL_MAXDGRAM (udp.maxdgram) Maximum outgoing UDP datagram size UDPCTL_RECVSPACE (udp.recvspace) Maximum space for incoming UDP datagrams udp.log_in_vain For all udp datagrams, to ports on which there is no socket listening, log the connection attempt (disabled by default). udp.blackhole When a datagram is received on a port where there is no socket listening, do not return an ICMP port unreachable message. (Disabled by default. See blackhole(4).) ERRORS
A socket operation may fail with one of the following errors returned: [EISCONN] when trying to establish a connection on a socket which already has one, or when trying to send a datagram with the desti- nation address specified and the socket is already connected; [ENOTCONN] when trying to send a datagram, but no destination address is specified, and the socket has not been connected; [ENOBUFS] when the system runs out of memory for an internal data structure; [EADDRINUSE] when an attempt is made to create a socket with a port which has already been allocated; [EADDRNOTAVAIL] when an attempt is made to create a socket with a network address for which no network interface exists. SEE ALSO
getsockopt(2), recv(2), send(2), socket(2), blackhole(4), inet(4), intro(4), ip(4) HISTORY
The udp protocol appeared in 4.2BSD. BSD
June 5, 1993 BSD
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