Free Online Network & Developer Tools
Free online network diagnostics and security testing tools, no registration required
IP 與位置
安全與隱私
網路診斷
網域與 DNS
網路工具
Port Guides
Port 20
FTP-DATA
Port 21
FTP
Port 22
SSH
Port 23
Telnet
Port 25
SMTP
Port 53
DNS
Port 67
DHCP Server
Port 68
DHCP Client
Port 69
TFTP
Port 80
HTTP
Port 110
POP3
Port 119
NNTP
Port 123
NTP
Port 135
MS RPC
Port 137
NetBIOS Name
Port 138
NetBIOS Datagram
Port 139
NetBIOS Session
Port 143
IMAP
Port 161
SNMP
Port 162
SNMP Trap
Port 179
BGP
Port 194
IRC
Port 389
LDAP
Port 443
HTTPS
Port 445
SMB
Port 465
SMTPS
Port 500
IKE
Port 514
Syslog
Port 515
LPD
Port 520
RIP
Port 587
SMTP Submission
Port 636
LDAPS
Port 993
IMAPS
Port 995
POP3S
Port 1080
SOCKS
Port 1194
OpenVPN
Port 1433
MS SQL Server
Port 1434
MS SQL Browser
Port 1521
Oracle DB
Port 1701
L2TP
Port 1723
PPTP
Port 1883
MQTT
Port 2049
NFS
Port 2082
cPanel
Port 2083
cPanel SSL
Port 2181
ZooKeeper
Port 3000
Dev Server
Port 3306
MySQL
Port 3389
RDP
Port 4443
Pharos
Port 5000
UPnP
Port 5432
PostgreSQL
Port 5672
RabbitMQ
Port 5900
VNC
Port 5984
CouchDB
Port 6379
Redis
Port 6443
Kubernetes API
Port 6667
IRC
Port 8000
HTTP Alt
Port 8080
HTTP Proxy
Port 8443
HTTPS Alt
Port 8888
HTTP Alt
Port 9000
PHP-FPM
Port 9090
Prometheus
Port 9092
Kafka
Port 9200
Elasticsearch
Port 9300
Elasticsearch
Port 11211
Memcached
Port 27017
MongoDB
Port 27018
MongoDB Shard
Port 28017
MongoDB Web
Port 50000
DB2
Port 51820
WireGuard
HTTP Status Guides
100 Continue
Informational
101 Switching Protocols
Informational
200 OK
Success
201 Created
Success
202 Accepted
Success
204 No Content
Success
301 Moved Permanently
Redirection
302 Found
Redirection
303 See Other
Redirection
304 Not Modified
Redirection
307 Temporary Redirect
Redirection
308 Permanent Redirect
Redirection
400 Bad Request
Client Error
401 Unauthorized
Client Error
402 Payment Required
Client Error
403 Forbidden
Client Error
404 Not Found
Client Error
405 Method Not Allowed
Client Error
406 Not Acceptable
Client Error
407 Proxy Authentication Required
Client Error
408 Request Timeout
Client Error
409 Conflict
Client Error
410 Gone
Client Error
413 Payload Too Large
Client Error
415 Unsupported Media Type
Client Error
418 I'm a Teapot
Client Error
422 Unprocessable Entity
Client Error
429 Too Many Requests
Client Error
451 Unavailable For Legal Reasons
Client Error
500 Internal Server Error
Server Error
501 Not Implemented
Server Error
502 Bad Gateway
Server Error
503 Service Unavailable
Server Error
504 Gateway Timeout
Server Error
505 HTTP Version Not Supported
Server Error
507 Insufficient Storage
Server Error
511 Network Authentication Required
Server Error
DNS Record Guides
A Record
Address Record
AAAA Record
IPv6 Address Record
MX Record
Mail Exchange Record
CNAME Record
Canonical Name Record
TXT Record
Text Record
NS Record
Name Server Record
SOA Record
Start of Authority Record
PTR Record
Pointer Record
SRV Record
Service Locator Record
CAA Record
Certification Authority Authorization
DMARC Record
Domain-based Message Authentication
SPF Record
Sender Policy Framework
DKIM Record
DomainKeys Identified Mail
NAPTR Record
Naming Authority Pointer Record
ALIAS Record
ALIAS Record (ANAME)
SSL Error Guides
ERR_CERT_AUTHORITY_INVALID
SSL/TLS Error Fix
ERR_CERT_DATE_INVALID
SSL/TLS Error Fix
ERR_SSL_PROTOCOL_ERROR
SSL/TLS Error Fix
NET::ERR_CERT_COMMON_NAME_INVALID
SSL/TLS Error Fix
ERR_CERT_REVOKED
SSL/TLS Error Fix
ERR_SSL_VERSION_OR_CIPHER_MISMATCH
SSL/TLS Error Fix
ERR_CERT_WEAK_SIGNATURE_ALGORITHM
SSL/TLS Error Fix
ERR_CERTIFICATE_TRANSPARENCY_REQUIRED
SSL/TLS Error Fix
SSL_ERROR_HANDSHAKE_FAILURE_ALERT
SSL/TLS Error Fix
SEC_ERROR_EXPIRED_CERTIFICATE
SSL/TLS Error Fix
Network Error Guides
ERR_CONNECTION_REFUSED
Network Error Fix
ERR_CONNECTION_TIMED_OUT
Network Error Fix
ERR_NAME_NOT_RESOLVED
Network Error Fix
ERR_INTERNET_DISCONNECTED
Network Error Fix
ERR_NETWORK_CHANGED
Network Error Fix
ERR_CONNECTION_RESET
Network Error Fix
ERR_TUNNEL_CONNECTION_FAILED
Network Error Fix
ERR_PROXY_CONNECTION_FAILED
Network Error Fix
ERR_TOO_MANY_REDIRECTS
Network Error Fix
ERR_NETWORK_IO_SUSPENDED
Network Error Fix