This document provides a list of ports which generate an error when browsing via Chrome. It is a super-set of ports most of which are also restricted in Mozilla Firefox as they’re reserved for the services listed below and are therefore considered unsafe for other services to be hosted/accessible as these are the most commonly attempted ports for dos attacks etc. If used, neo4j would appear unreachable via chrome if customers set connector address ports (dbms.connector.http.listen_address=:7474 or dbms.connector.bolt.listen_address=:7687) to one of these. Note that the list is non-exhaustive and is subject to alteration over time.

Table 1. Restricted Ports on Chrome and corresponding services

Port Number

Service Name

1

tcpmux

7

echo

9

discard

11

systat

13

daytime

15

netstat

17

qotd

19

chargen

20

ftp data

21

ftp access

22

ssh

23

telnet

25

smtp

37

time

42

name

43

nicname

53

domain

77

priv-rjs

79

finger

87

ttylink

95

supdup

101

hostriame

102

iso-tsap

103

gppitnp

104

acr-nema

109

pop2

110

pop3

111

sunrpc

113

auth

115

sftp

117

uucp-path

119

nntp

123

NTP

135

loc-srv /epmap

139

netbios

143

imap2

179

BGP

389

ldap

465

smtp+ssl

512

print / exec

513

login

514

shell

515

printer

526

tempo

530

courier

531

chat

532

netnews

540

uucp

556

remotefs

563

nntp+ssl

587

stmp

601

??

636

ldap+ssl

993

ldap+ssl

995

pop3+ssl

2049

nfs

3659

apple-sasl / PasswordServer

4045

lockd

6000

X11

6665

Alternate IRC [Apple addition]

6666

Alternate IRC [Apple addition]

6667

Standard IRC [Apple addition]

6668

Alternate IRC [Apple addition]

6669

Alternate IRC [Apple addition]

The following useful chrome extension (Open Port Check Tool) can be used to determine the current status of a port to check port status of an IP address and scan open ports on that connection. The tool can also be used to determine whether port forwarding is setup correctly or if the server applications are blocked or not by a firewall.

Details


Author:
Umar Muzammil
Applicable versions:
all
Keywords:
browserchromeneo4j-allportsurl