IP Local Port Range (Ephemeral port)

Windows 部份

• Windows 2008 之前 1025 ~ 5000
• Windows 2008 之後(含) 49152 ~ 65535 (IANA)

Verify :

• netsh int ipv4 show dynamicport tcp
• netsh int ipv4 show dynamicport udp
• netsh int ipv6 show dynamicport tcp
• netsh int ipv6 show dynamicport udp

Configuration :

• netsh int ipv4 set dynamicport tcp start=10000 num=1000
• netsh int ipv4 set dynamicport udp start=10000 num=1000
• netsh int ipv6 set dynamicport tcp start=10000 num=1000
• netsh int ipv6 set dynamicport udp start=10000 num=1000

特殊狀況 :

• Exchange Server 2007 會自動修改為 1025 ~ 60000

Linux 部份

• 32768 ~ 61000

Verify :

• sysctl net/ipv4/ip_local_port_range

Configuration :

• sysctl -w net.ipv4.ip_local_port_range="1024 64000"
• edit /etc/sysctl.conf with "net.ipv4.ip_local_port_range = 1024 64000"

OpenBSD

• 1024 ~ 49151
• 49152 ~ 65535

Verify :

• sysctl net.inet.ip.portfirst net.inet.ip.portlast net.inet.ip.porthifirst net.inet.ip.porthilast

Configuration :

• sysctl net.inet.ip.portfirst=32768 net.inet.ip.portlast=49151 net.inet.ip.porthifirst=49152 net.inet.ip.porthilast=65535
• edit /etc/sysctl.conf with "net.inet.ip.portfirst=32768 net.inet.ip.portlast=49151 net.inet.ip.porthifirst=49152 net.inet.ip.porthilast=65535"

Solaris

• 32768 ~ 65535

Verify :

• /usr/sbin/ndd /dev/tcp tcp_smallest_anon_port tcp_largest_anon_port

Configuration :

• ndd -set /dev/tcp tcp_smallest_anon_port=9000 
• ndd -set /dev/tcp tcp_largest_anon_port=65500 
• ndd -set /dev/udp udp_smallest_anon_port=9000 
• ndd -set /dev/udp udp_largest_anon_port=65500   

MAC OS X

• 49152 ~ 65535

Verify :

• sysctl net.inet.ip.portrange.first net.inet.ip.portrange.last

Configuration :

• sysctl -w net.inet.ip.portrange.first=32768
• sysctl -w net.inet.ip.portrange.last=65535

Android , BlackBerry , FreeBSD ... , Selection Strategy 沒有談到.

參考 :

http://en.wikipedia.org/wiki/Ephemeral_port

http://www.ncftp.com/ncftpd/doc/misc/ephemeral_ports.html

https://gist.github.com/mbbx6spp/3154170