.\" -*- nroff -*- .de Id .ds Dt \\$4 \\$5 .. .Id $Id: startup-config.5,v 1.17 2006/04/27 14:38:14 bodea Exp $ .TH STARTUP-CONFIG 5 "\*(Dt" L2TPNS "File Formats and Conventions" .SH NAME startup\-config \- configuration file for l2tpns .SH SYNOPSIS /etc/l2tpns/startup-config .SH DESCRIPTION .B startup-config is the configuration file for .BR l2tpns . .PP The format is plain text, in the same format as accepted by the configuration mode of .BR l2tpns 's telnet administrative interface. Comments are indicated by either the character .B # or .BR ! . .SS SETTINGS Settings are specified with .IP .BI "set " "variable value" .PP The following .IR variable s may be set: .RS .TP .B debug Set the level of debugging messages written to the log file. The value should be between 0 and 5, with 0 being no debugging, and 5 being the highest. .TP .B log_file This will be where all logging and debugging information is written to. This may be either a filename, such as .BR /var/log/l2tpns , or the string .BR syslog : \fIfacility\fR , where .I facility is any one of the syslog logging facilities, such as .BR local5 . .TP .B pid_file If set, the process id will be written to the specified file. The value must be an absolute path. .TP .B random_device Path to random data source (default .BR /dev/urandom ). Use "" to use the rand() library function. .TP .B l2tp_secret The secret used by .B l2tpns for authenticating tunnel request. Must be the same as the LAC, or authentication will fail. Only actually be used if the LAC requests authentication. .TP .B l2tp_mtu MTU of interface for L2TP traffic (default: 1500). Used to set link MRU and adjust TCP MSS. .TP .B ppp_restart_time Restart timer for PPP protocol negotiation in seconds (default: 3). .TP .B ppp_max_configure Number of configure requests to send before giving up (default: 10). .TP .B ppp_max_failure Number of Configure-Nak requests to send before sending a Configure-Reject (default: 5). .TP .BR primary_dns , " secondary_dns" Whenever a PPP connection is established, DNS servers will be sent to the user, both a primary and a secondary. If either is set to 0.0.0.0, then that one will not be sent. .TP .BR primary_radius , " secondary_radius" Sets the RADIUS servers used for both authentication and accounting. If the primary server does not respond, then the secondary RADIUS server will be tried. .TP .BR primary_radius_port , " secondary_radius_port" Sets the authentication ports for the primary and secondary RADIUS servers. The accounting port is one more than the authentication port. If no ports are given, authentication defaults to 1645, and accounting to 1646. .TP .B radius_accounting If set to true, then RADIUS accounting packets will be sent. A .B Start record will be sent when the session is successfully authenticated, and a .B Stop record when the session is closed. .TP .B radius_interim If .B radius_accounting is on, defines the interval between sending of RADIUS interim accounting records (in seconds). .TP .B radius_secret Secret to be used in RADIUS packets. .TP .B radius_authtypes A comma separated list of supported RADIUS authentication methods ("pap" or "chap"), in order of preference (default "pap"). .TP .B radius_dae_port Port for DAE RADIUS (Packet of Death/Disconnect, Change of Authorization) requests (default: 3799). .TP .B allow_duplicate_users Allow multiple logins with the same username. If false (the default), any prior session with the same username will be dropped when a new session is established. .TP .B guest_account Allow multiple logins matching this specific username. .TP .B bind_address When the tun interface is created, it is assigned the address specified here. If no address is given, 1.1.1.1 is used. Packets containing user traffic should be routed via this address if given, otherwise the primary address of the machine. .TP .B peer_address Address to send to clients as the default gateway. .TP .B send_garp Determines whether or not to send a gratuitous ARP for the .B bind_address when the server is ready to handle traffic (default: true). This setting is ignored if BGP is configured. .TP .B throttle_speed Sets the default speed (in kbits/s) which sessions will be limited to. .TP .B throttle_buckets Number of token buckets to allocate for throttling. Each throttled session requires two buckets (in and out). .TP .B accounting_dir If set to a directory, then every 5 minutes the current usage for every connected use will be dumped to a file in this directory. .TP .B dump_speed If set to true, then the current bandwidth utilization will be logged every second. Even if this is disabled, you can see this information by running the .B uptime command on the CLI. .TP .B multi_read_count Number of packets to read off each of the UDP and TUN fds when returned as readable by select (default: 10). Avoids incurring the unnecessary system call overhead of select on busy servers. .TP .B scheduler_fifo Sets the scheduling policy for the .B l2tpns process to .BR SCHED_FIFO . This causes the kernel to immediately preempt any currently running .B SCHED_OTHER (normal) process in favour of .B l2tpns when it becomes runnable. .br Ignored on uniprocessor systems. .TP .B lock_pages Keep all pages mapped by the .B l2tpns process in memory. .TP .B icmp_rate Maximum number of host unreachable ICMP packets to send per second. .TP .B packet_limit Maximum number of packets of downstream traffic to be handled each tenth of a second per session. If zero, no limit is applied (default: 0). Intended as a DoS prevention mechanism and not a general throttling control (packets are dropped, not queued). .TP .B cluster_address Multicast cluster address (default: 239.192.13.13). .TP .B cluster_interface Interface for cluster packets (default: eth0). .TP .B cluster_mcast_ttl TTL for multicast packets (default: 1). .TP .B cluster_hb_interval Interval in tenths of a second between cluster heartbeat/pings. .TP .B cluster_hb_timeout Cluster heartbeat timeout in tenths of a second. A new master will be elected when this interval has been passed without seeing a heartbeat from the master. .TP .B cluster_master_min_adv Determines the minumum number of up to date slaves required before the master will drop routes (default: 1). .TP .B ipv6_prefix Enable negotiation of IPv6. This forms the the first 64 bits of the client allocated address. The remaining 64 come from the allocated IPv4 address and 4 bytes of 0s. .RE .SS BGP ROUTING The routing configuration section is entered by the command .IP .BI "router bgp " as .PP where .I as specifies the local AS number. .PP Subsequent lines prefixed with .BI "neighbour " peer define the attributes of BGP neighhbours. Valid commands are: .IP .BI "neighbour " peer " remote-as " as .br .BI "neighbour " peer " timers " "keepalive hold" .PP Where .I peer specifies the BGP neighbour as either a hostname or IP address, .I as is the remote AS number and .IR keepalive , .I hold are the timer values in seconds. .SS NAMED ACCESS LISTS Named access lists may be defined with either of .IP .BI "ip access\-list standard " name .br .BI "ip access\-list extended " name .PP Subsequent lines starting with .B permit or .B deny define the body of the access\-list. .PP .B Standard Access Lists .RS 4n Standard access lists are defined with: .IP .RB { permit | deny } .IR source " [" dest ] .PP Where .I source and .I dest specify IP matches using one of: .IP .I address .I wildard .br .B host .I address .br .B any .PP .I address and .I wildard are in dotted-quad notation, bits in the .I wildard indicate which address bits in .I address are relevant to the match (0 = exact match; 1 = don't care). .PP The shorthand .RB ' host .IR address ' is equivalent to .RI ' address .BR 0.0.0.0 '; .RB ' any ' to .RB ' 0.0.0.0 .BR 255.255.255.255 '. .RE .PP .B Extended Access Lists .RS 4n Extended access lists are defined with: .IP .RB { permit | deny } .I proto .IR source " [" ports "] " dest " [" ports "] [" flags ] .PP Where .I proto is one of .BR ip , .B tcp or .BR udp , and .I source and .I dest are as described above for standard lists. .PP For TCP and UDP matches, source and destination may be optionally followed by a .I ports specification: .IP .RB { eq | neq | gt | lt } .I port .br .B range .I from to .PP .I flags may be one of: .RS .HP .RB { match\-any | match\-all } .RB { + | - }{ fin | syn | rst | psh | ack | urg } \&... .br Match packets with any or all of the tcp flags set .RB ( + ) or clear .RB ( - ). .HP .B established .br Match "established" TCP connections: packets with .B RST or .B ACK set, and .B SYN clear. .HP .B fragments .br Match IP fragments. May not be specified on rules with layer 4 matches. .RE .SH SEE ALSO .BR l2tpns (8)