ZyXEL Communications NSA-220 User Manual

 Chapter 15 Troubleshooting

NSA-220 User’s Guide

• Web publishing uses TCP protocol and the port number you specify. Make sure there is 

not another service using TCP protocol with the same port number. See 

 for a list of common services and their associated protocols and port numbers.

• If Firefox access to the share does not work, check that you did not set the Web publishing 

feature to use one of the following ports. (Firefox blocks these ports by default.)

• Make sure your ISP allows you to run a server and is not blocking the port number of the 

NSA’s web publishing feature.

Table 50   Ports Blocked By Default in Firefox

1

tcpmux

95

supdup

513

login

7

echo

101

hostriame

514

shell

9

discard

102

iso-tsap

515

printer

11

systat

103

gppitnp

526

tempo

13

daytime

104

acr-nema

530

courier

15

netstat

109

POP2

531

chat

17

qotd

110

POP3

532

netnews

19

chargen

111

sunrpc

540

uucp

20

ftp data

113

auth

556

remotefs

21

ftp control

115

sftp

563

NNTP+SSL

22

ssh

117

uucp-path

587

submission

23

telnet

119

NNTP

601

syslog

25

smtp

123

NTP

636

LDAP+SSL

37

time

135

loc-srv epmap

993

IMAP+SSL

42

name

139

netbios

995

POP3+SSL

43

nicname

143

IMAP2

2049

nfs

53

domain

179

BGP

4045

lockd

77

priv-rjs

389

LDAP

6000

X11

79

finger

465

SMTP+SSL

87

ttylink

512

print exec