In General:

• A modular design allows individual configuration
• Checks of configuration syntax and semantics in order to avoid obvious misconfigurations
• Easy remote update
• Execution of commands / procedures based on telephone calls (eg dial-up)
• Networked imond server with least cost routing monitoring and controlling functions
• Networked telmond server to display incoming phone calls
• Windows / Unix / Linux client imonc interfacing imond and telmond
• Creation of boot media on Linux and Windows
• Support for various boot media such as Hard drive, CD-ROM, Compact Flash, DoC, network
• Serial Console

Routing:

• Mapping of WAN interfaces to so-called circuits
• Parallel operation / routing of DSL, UMTS and ISDN Circuits possible
• Least-Cost-Routing: automatic provider selection based on daytime (ISDN only)
• Display / calculation / logging of connection times and costs

Firewall:

• Stateful packet filter supporting
• IP masquerading
• Port forwarding
• DMZ
• Logging

DSL:

• PPPOE
• Roaring Penguin PPPoE driver
• Kernel basied PPPOE for better performance
• Support for AVM cards (several Fritz poducts)
• USB devices
• PPTP/XDSL for DSL connections in Austria

ISDN:

• Up-to-date HiSaX drivers: support for more than 39 card types
• Support for AVM cards (several Fritz products)
• Multiple ISDN connection options: in/out/callback, raw-ip/ppp
• Channel bundeling: automatic bandwidth adjustments or manual adding of the 2nd ISDN channel using the Windows / Unix client

Additional Program Packages:

• OpenVPN providing encrypted connection of networks over the Internet
• SSH login
• WLAN connections using WEP / WPA / WPA2
• Mini webserver for status display and operation
• PCMCIA support
• Configuration of ISA-PNP cards, isapnp tools
• Configuration of the serial interface
• Emergency system for remote maintenance via ISDN
• Support of LCD displays displaying connections and transfer rates
• PPP server/router over serial interface
• ISDN modem emulation over the serial interface
• Print server using the lpr/lpd protocol
• Access to internet time servers to synchronize system time

Technical Informations:

• Linux kernel 3.14.x
• Linux-XEN-domU kernel 3.14.x
• µClibc
• Netfilter / Iptables based packet filter
• dnsmasq as a local DNS and DHCP server
• Recent drivers for network cards: support for more than 40 card families

Hardware Requirements:

• at least a 586er CPU with MMX Extensions
• 64 MiB RAM
• Ethernet network card(s)
• ISDN: HiSax supported ISDN card (Type 1-39) or AVM ISA / PCI / USB