[h2title]ping[/h2title]

icmp协议

[h2title]远程连接[/h2title]

ftp 20-21
ssh 22
telnet 23
rdp 3389

[h2title]应用[/h2title]

http 80
https 443
http_alt 8080

[h2title]数据库[/h2title]

mysql 3306
mssql 1433
PostgreSQL 5432
Oracle 1521
Redis 6379