Technical Notes

This technical note lists the TCP and UDP Ports used by Reflection applications and components. This information is useful for troubleshooting, and when configuring a firewall to allow Reflection connections.

Important Security Notes:

• Creating a secure network environment is a complex task involving many custom elements designed to fit your individual network environment and security needs. The information provided in this note does not include all necessary security options for your environment. This information is designed only to provide Reflection customers with a framework on which to start building individual security environments.
• When configuring a firewall, be as restrictive as possible. Open only ports and IP protocols that are necessary for the connection types you intend to use, and be specific about whether the connection should be incoming or outgoing. The direction of the connection depends on where the connection is initiated and the protocol in use. For example, an active FTP connection requires the initiating computer to have outgoing port 21/tcp (command channel) and incoming port 20/tcp (data channel) open.
• The lists below specify only default Reflection ports. Depending on your network environment, you may need to configure additional port values.

Port Values

The tables below detail the port values for service protocols supported by the following Reflection applications. Whether or not the port should be configured for incoming or outgoing data depends on where the connection is initiated from and your network configuration.

The values used by Reflection are IANA (Internet Assigned Numbers Authority) and other standard values.

Reflection Windows-Based Applications

The following ports and service protocols are used in Reflection for IBM, Reflection for UNIX and OpenVMS, Reflection for ReGIS Graphics, and Reflection for HP.

Application abbreviation key:

Port / IP Protocol	Service Protocol	Comment	RIBM	RUO	RRG	RHP
20/tcp	FTP-data	Data channel		X	X	X
21/tcp	FTP	Command channel		X	X	X
22/tcp	SSH	Secure Shell, sftp, scp		X	X	X
23/tcp	Telnet	Telnet; TN3270; TN3270; TN5250	X	X	X	X
42/tcp	Nameserver	Hostname to IP address	X	X	X	X
53/udp/tcp	DNS	Domain Name Services	X	X	X	X
80/tcp	HTTP	Unsecure HTTP via Reflection Web Launch and Reflection for the Web	X	X	X	X
88/udp/tcp	Kerberos	Kerberos authentication	X	X	X	X
443/udp/tcp	https	Secure http via Reflection Web Launch and Reflection for the Web	X	X	X	X
443/udp/tcp	kpasswd	Kerberos password changing (kpasswd daemon)	X	X	X	X
513/tcp	login	rlogin		X	X	X
749/udp/tcp	kerberos-adm	Kerberos password changing (v5passwdd daemon)	X	X	X	X
992/tcp	telnet	SSL-secured Telnet	X	X	X	X
1080/udp/tcp	socks	SOCKS	X	X	X	X
1024-5000	VAXLINK2 FFT	Fast file transfer		X	X	X
1530 1537	NS/VT	Network Services, Virtual Terminal		X	X	X
1649/udp/tcp	kermit	Kermit file transfer		X	X	X
8471/tcp	lipi	AS/400 LIPI file transfer	X
8476/tcp	lipi	AS/400 signon server port	X
8478/tcp	ehntfw	AS/400 EHNTFW file transfer	X
30000-40000	PCLINK FFT	Fast file transfer		X	X	X

Reflection PC X Server and NFS Client Applications

The following ports and service protocols are used in Reflection X and Reflection NFS Client.

Note: Reflection X XDMCP broadcasts and Reflection NFS Client connections do not use well-known port numbers and can not be used through a firewall.

Application abbreviation key:

Port / IP Protocol	Service Protocol	Comment	RX	NFS
22/tcp	SSH	Secure Shell, sftp, scp	X
23/tcp	Telnet	Telnet; TN3270; TN3270; TN5250	X
42/tcp	Nameserver	Hostname to IP address	X	X
53/udp/tcp	DNS	Domain Name Services	X	X
80/tcp	HTTP	Unsecure HTTP via Reflection Web Launch and Reflection for the Web	X
88/udp/tcp	Kerberos	Kerberos authentication	X
111	Sunrpc	Portmapper		X
177/udp	XDMCP Broadcast	X Display Manager	X
443/udp/tcp	https	Secure http via Reflection Web Launch and Reflection for the Web	X
443/udp/tcp	kpasswd	Kerberos password changing (kpasswd daemon)	X
512/tcp	exec	rexec	X
513/tcp	login	rlogin	X
514/tcp	shell	rsh	X
635/udp	mount	NFS mount service		X
640/udp	pcnfs	PC-NFS DOS authentication		X
731/udp 733/udp	ypserv	NIS server and binder processes		X
732/tcp	ypserv	NIS server and binder processes		X
749/udp/tcp	kerberos-adm	Kerberos password changing (v5passwdd daemon)	X
1080/udp/tcp	socks	SOCKS	X
2049/udp/tcp	nfsd	NFS file service		X
6000/tcp	X Protocol	Incoming ports for RX clients	X
7000/tcp	fs	X font server	X
7100/tcp	xfs	X font server	X

Reflection Components

The following ports and service protocols are used in Reflection FTP, Reflection TimeSync, Reflection Line Printer Daemon (LPD), and Reflection Ping.

Component abbreviation key:

Port / IP Protocol	Service Protocol	Comment	RFTP	TimeSync	LPD	Ping
7/icmp	Echo	Data echo				X
20/tcp	FTP-data	Data channel	X
21/tcp	FTP	Command channel	X
22/tcp	SSH	Secure Shell, sftp, scp	X
37/udp/tcp	Time	Timeserver		X
42/tcp	Nameserver	Hostname to IP address	X	X	X	X
53/udp/tcp	DNS	Domain Name Services	X	X	X	X
88/udp/tcp	Kerberos	Kerberos authentication	X
123/udp	NTP	Network Time Protocol		X
443/udp/tcp	kpasswd	Kerberos password changing (kpasswd daemon)	X
515/tcp	printer	spooler			X
520/udp	route	routed				X
749/udp/tcp	kerberos-adm	Kerberos password changing (v5passwdd daemon)	X
1080/udp/tcp	socks	SOCKS	X