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TechFinity toolkit

Network Reference

Searchable ports, CIDR capacity, DNS records, private ranges, HTTP status families, and protocol-layer references.

Common ports

PortTransportService
20TCPFTP data
21TCPFTP control
22TCPSSH / SFTP
23TCPTelnet
25TCPSMTP
53TCP/UDPDNS
67UDPDHCP server
68UDPDHCP client
69UDPTFTP
80TCPHTTP
110TCPPOP3
123UDPNTP
135TCP/UDPMicrosoft RPC
137UDPNetBIOS name
138UDPNetBIOS datagram
139TCPNetBIOS session
143TCPIMAP
161UDPSNMP
162UDPSNMP traps
179TCPBGP
389TCP/UDPLDAP
443TCPHTTPS
445TCPSMB
465TCPSMTPS
500UDPIKE / IPsec
514UDPSyslog
587TCPSMTP submission
636TCPLDAPS
853TCPDNS over TLS
993TCPIMAPS
995TCPPOP3S
1194UDPOpenVPN
1433TCPMicrosoft SQL Server
1521TCPOracle Database
1720TCPH.323
1812UDPRADIUS authentication
1813UDPRADIUS accounting
1883TCPMQTT
2049TCP/UDPNFS
2427UDPMGCP gateway
2727UDPMGCP call agent
3306TCPMySQL / MariaDB
3389TCP/UDPRDP
3478TCP/UDPSTUN / TURN
5060TCP/UDPSIP
5061TCPSIP TLS
5222TCPXMPP client
5432TCPPostgreSQL
5672TCPAMQP
5900TCPVNC
6379TCPRedis
8080TCPAlternate HTTP
8443TCPAlternate HTTPS
8883TCPMQTT TLS
9200TCPElasticsearch
11211TCP/UDPMemcached
27017TCPMongoDB

DNS record types

AIPv4 address
AAAAIPv6 address
CNAMEAlias to another name
MXMail exchanger and priority
TXTArbitrary text, SPF, verification
NSAuthoritative name server
SOAZone authority and timers
SRVService location, priority, weight, and port
PTRReverse lookup name
CAAAllowed certificate authorities
NAPTRRule-based service discovery, often VoIP
TLSADANE certificate association
DSDNSSEC delegation signer
DNSKEYDNSSEC public key

Private & special ranges

10.0.0.0/8Private IPv4
172.16.0.0/12Private IPv4
192.168.0.0/16Private IPv4
100.64.0.0/10Carrier-grade NAT
169.254.0.0/16IPv4 link-local
127.0.0.0/8IPv4 loopback
fc00::/7IPv6 unique local
fe80::/10IPv6 link-local
::1/128IPv6 loopback

IPv4 CIDR capacity

PrefixAddressesTraditional usableMask

HTTP status families

1xx · InformationalRequest received; processing continues.
2xx · Success200 OK, 201 Created, 204 No Content.
3xx · Redirection301/308 permanent, 302/307 temporary, 304 cached.
4xx · Client errorBad request, authentication, permission, not found, conflict, or rate limit.
5xx · Server errorApplication, gateway, availability, or timeout failure.

OSI model

  1. Application · HTTP, DNS, SIP
  2. Presentation · TLS, encoding
  3. Session · RPC, NetBIOS
  4. Transport · TCP, UDP
  5. Network · IP, ICMP, routing
  6. Data link · Ethernet, MAC, VLAN
  7. Physical · Copper, fiber, radio