pppd linux command

pppd

pppd [options] [tty] [speed]

System administration command. PPP stands for the Point-to-Point Protocol; it allows datagram transmission over a serial connection. pppd attempts to configure tty for PPP (searching in /dev) or, by default, the controlling terminal. You can also specify a baud rate of speed.

Options

asyncmap map

Specify which control characters cannot pass over the line. map should be a 32-bit hex number, where each bit represents a character to escape. For example, bit 00000001 represents the character 0x00; bit 80000000 represents the character 0x1f or _. You may specify multiple characters.

auth

Require self-authentication by peers before allowing packets to move.

connect command

Connect as specified by command, which may be a binary or shell command.

debug, -d

Increment the debugging level.

defaultroute

Add a new default route in which the peer is the gateway. When the connection shuts down, remove the route.

-detach

Operate in the foreground. By default, pppd forks and operates in the background.

disconnect command

Close the connection as specified by command, which may be a binary or shell command.

domain d

Specify a domain name of d.

escape character-list

Escape all characters in character-list, which should be a comma-separated list of hex numbers. You cannot escape 0x20-0x3f or 0x5e.

file file

Consult file for options.

lock

Allow only pppd to access the device.

mru bytes

Refuse packets of more than bytes bytes.

name name

Specify a machine name for the local system.

netmask mask

Specify netmask (for example, 255.255.255.0).

passive, -p

Do not exit if peer does not respond to attempts to initiate a connection. Instead, wait for a valid packet from the peer.

silent

Send no packets until after receiving one.

[local_IP_address]:[remote_IP_address]

Specify the local and/or remote interface IP addresses, as hostnames or numeric addresses.

Files

/var/run/pppn.pid

pppd's process ID. The n in pppn.pid is the number of the PPP interface unit corresponding to this pppd process.

/etc/ppp/ip-up

Binary or script to be executed when the PPP link becomes active.

/etc/ppp/ip-down

Binary or script to be executed when the PPP link goes down.

/etc/ppp/pap-secrets

Contains usernames, passwords, and IP addresses for use in PAP authentication.

/etc/ppp/options

System defaults. Options in this file are set before the command-line options.

~/.ppprc

The user's default options. These are read before command-line options but after the system defaults.

/etc/ppp/options.ttyname

Name of the default serial port.