Привет.
Задался поиском pseudo-device для опёнка ;) вот что нарыл, может, кто меня поправит или дополнит.

# 34 Pseudo Device.
pseudo-device bio 1 # ioctl multiplexing device
pseudo-device bpfilter 8 # фильтры пакетов Беркли, требуются для работы tcpdump, nmap и др.
pseudo-device bridge # network bridging support
pseudo-device carp # CARP protocol support
pseudo-device ccd 4 # Concatenated Disk Devices, 4 ccd devices (virtual disks)
pseudo-device enc 1 # option IPSEC needs the encapsulation interface
pseudo-device ether # Общие подпрограммы для всех ethernet'овских драйверов
pseudo-device gre # GRE encapsulation interface
pseudo-device hotplug 1 # devices hot plugging
pseudo-device ksyms 1 # kernel symbols device
pseudo-device loop # network loopback
pseudo-device mtrr 1 # Memory range attributes control
pseudo-device nvram 1 #
pseudo-device pctr 1 #
pseudo-device pf 1 # поддержка брандмауэра Packet Filter
pseudo-device pflog 1 # псевдоустройство для журналирования работы pf
pseudo-device pfsync # pf sync if
pseudo-device ppp # PPP
pseudo-device pty 16 # initial number of pseudo-terminals
pseudo-device raid 4 # RAIDframe disk driver
pseudo-device rd 4 #
pseudo-device sequencer 1 #
pseudo-device sl # CSLIP
pseudo-device sppp 1 # Sync PPP/HDLC
pseudo-device strip # Starmode Radio IP Interface
pseudo-device systrace 1 # system call tracing device
pseudo-device tb 1 # Tablet Line Discipline
pseudo-device tun # network tunneling over tty
pseudo-device vlan # IEEE 802.1Q VLAN
pseudo-device vnd 4 # Paging to Files

# mouse & keyboard multiplexor pseudo-devices
pseudo-device wsmux 2 # keyboard and mouse multiplexor
pseudo-device crypto 1 # Mouse & keyboard multiplexor pseudo-devices

#for IPv6
pseudo-device gif 4 # IPv[46] over IPv[46] tunnel (RFC1933)
pseudo-device faith 1 # IPv[46] tcp relay translation i/f
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