To boot up the RPD, we will need two services configured on the
Raspberry Pi in IPv6: 1) DHCPv6 service 2) time service. To provide SW upgrade
capabilities on the Raspberry Pi for the RPD, we will need a third one: TFTP
service.
First let us dip our toe to the services running on Linux by
listing them. For this we can use the following command:
pi@raspberrypi:~ $ sudo netstat -lp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 pi4b2.lan:47522 0.0.0.0:* LISTEN 3501/zerotier-one
tcp 0 0 pi4b2.lan:47523 0.0.0.0:* LISTEN 3501/zerotier-one
tcp 0 0 pi4b2.lan:9993 0.0.0.0:* LISTEN 3501/zerotier-one
tcp 0 0 localhost:9993 0.0.0.0:* LISTEN 3501/zerotier-one
tcp6 0 0 localhost:9993 [::]:* LISTEN 3501/zerotier-one
udp 0 0 pi4b2.lan:47522 0.0.0.0:* 3501/zerotier-one
udp 0 0 pi4b2.lan:47523 0.0.0.0:* 3501/zerotier-one
udp 0 0 0.0.0.0:46103 0.0.0.0:* 352/avahi-daemon: r
udp 0 0 0.0.0.0:bootpc 0.0.0.0:* 692/dhcpcd
udp 0 0 0.0.0.0:mdns 0.0.0.0:* 352/avahi-daemon: r
udp 0 0 pi4b2.lan:9993 0.0.0.0:* 3501/zerotier-one
udp6 0 0 [::]:dhcpv6-client [::]:* 692/dhcpcd
udp6 0 0 [::]:48271 [::]:* 352/avahi-daemon: r
udp6 0 0 [::]:mdns [::]:* 352/avahi-daemon: r
raw6 0 0 [::]:ipv6-icmp [::]:* 7 692/dhcpcd
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 2 [ ACC ] STREAM LISTENING 9742 1/init /run/systemd/journal/stdout
unix 2 [ ACC ] STREAM LISTENING 9763 1/init /run/systemd/fsck.progress
unix 2 [ ACC ] SEQPACKET LISTENING 10330 1/init /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 14993 692/dhcpcd /var/run/dhcpcd.sock
unix 2 [ ACC ] STREAM LISTENING 14995 692/dhcpcd /var/run/dhcpcd.unpriv.sock
unix 2 [ ACC ] STREAM LISTENING 18867 852/systemd /run/user/1000/systemd/private
unix 2 [ ACC ] STREAM LISTENING 13495 1/init /run/thd.socket
unix 2 [ ACC ] STREAM LISTENING 18873 852/systemd /run/user/1000/gnupg/S.dirmngr
unix 2 [ ACC ] STREAM LISTENING 13499 1/init /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 18877 852/systemd /run/user/1000/gnupg/S.gpg-agent.ssh
unix 2 [ ACC ] STREAM LISTENING 18880 852/systemd /run/user/1000/gnupg/S.gpg-agent.extra
unix 2 [ ACC ] STREAM LISTENING 13504 1/init /run/avahi-daemon/socket
unix 2 [ ACC ] STREAM LISTENING 18882 852/systemd /run/user/1000/gnupg/S.gpg-agent.browser
unix 2 [ ACC ] STREAM LISTENING 18884 852/systemd /run/user/1000/gnupg/S.gpg-agent
unix 2 [ ACC ] STREAM LISTENING 9724 1/init /run/systemd/private
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 pi4b2.lan:47522 0.0.0.0:* LISTEN 3501/zerotier-one
tcp 0 0 pi4b2.lan:47523 0.0.0.0:* LISTEN 3501/zerotier-one
tcp 0 0 pi4b2.lan:9993 0.0.0.0:* LISTEN 3501/zerotier-one
tcp 0 0 localhost:9993 0.0.0.0:* LISTEN 3501/zerotier-one
tcp6 0 0 localhost:9993 [::]:* LISTEN 3501/zerotier-one
udp 0 0 pi4b2.lan:47522 0.0.0.0:* 3501/zerotier-one
udp 0 0 pi4b2.lan:47523 0.0.0.0:* 3501/zerotier-one
udp 0 0 0.0.0.0:46103 0.0.0.0:* 352/avahi-daemon: r
udp 0 0 0.0.0.0:bootpc 0.0.0.0:* 692/dhcpcd
udp 0 0 0.0.0.0:mdns 0.0.0.0:* 352/avahi-daemon: r
udp 0 0 pi4b2.lan:9993 0.0.0.0:* 3501/zerotier-one
udp6 0 0 [::]:dhcpv6-client [::]:* 692/dhcpcd
udp6 0 0 [::]:48271 [::]:* 352/avahi-daemon: r
udp6 0 0 [::]:mdns [::]:* 352/avahi-daemon: r
raw6 0 0 [::]:ipv6-icmp [::]:* 7 692/dhcpcd
Active UNIX domain sockets (only servers)
Proto RefCnt Flags Type State I-Node PID/Program name Path
unix 2 [ ACC ] STREAM LISTENING 9742 1/init /run/systemd/journal/stdout
unix 2 [ ACC ] STREAM LISTENING 9763 1/init /run/systemd/fsck.progress
unix 2 [ ACC ] SEQPACKET LISTENING 10330 1/init /run/udev/control
unix 2 [ ACC ] STREAM LISTENING 14993 692/dhcpcd /var/run/dhcpcd.sock
unix 2 [ ACC ] STREAM LISTENING 14995 692/dhcpcd /var/run/dhcpcd.unpriv.sock
unix 2 [ ACC ] STREAM LISTENING 18867 852/systemd /run/user/1000/systemd/private
unix 2 [ ACC ] STREAM LISTENING 13495 1/init /run/thd.socket
unix 2 [ ACC ] STREAM LISTENING 18873 852/systemd /run/user/1000/gnupg/S.dirmngr
unix 2 [ ACC ] STREAM LISTENING 13499 1/init /var/run/dbus/system_bus_socket
unix 2 [ ACC ] STREAM LISTENING 18877 852/systemd /run/user/1000/gnupg/S.gpg-agent.ssh
unix 2 [ ACC ] STREAM LISTENING 18880 852/systemd /run/user/1000/gnupg/S.gpg-agent.extra
unix 2 [ ACC ] STREAM LISTENING 13504 1/init /run/avahi-daemon/socket
unix 2 [ ACC ] STREAM LISTENING 18882 852/systemd /run/user/1000/gnupg/S.gpg-agent.browser
unix 2 [ ACC ] STREAM LISTENING 18884 852/systemd /run/user/1000/gnupg/S.gpg-agent
unix 2 [ ACC ] STREAM LISTENING 9724 1/init /run/systemd/private
For now, please notice dhcpcd is one of the services. This
service is responsible for gaining IP addresses for interfaces. It comes handy for us now because we will need to configure a
static IPv6 address for the wired Gigabit so-called eth0 interface to serve the
RPD with all those DHCPv6, time and TFTP services. Please connect this wired
Gigabit port to a switch so that we can see the changes on the interface
as we move along.
Once connected, let us first use the following command to check
what IP addresses we currently have:
pi@raspberrypi:~ $ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ee brd ff:ff:ff:ff:ff:ff
inet 169.254.114.74/16 brd 169.254.255.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::4f1b:d468:f188:19ee/64 scope link
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ef brd ff:ff:ff:ff:ff:ff
inet 192.168.1.8/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
valid_lft 86384sec preferred_lft 75584sec
inet6 fe80::ed25:290d:d706:8ab2/64 scope link
valid_lft forever preferred_lft forever
4: ztks5s5bvz: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2800 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether d6:8a:40:30:e3:08 brd ff:ff:ff:ff:ff:ff
inet 192.168.192.43/24 brd 192.168.192.255 scope global ztks5s5bvz
valid_lft forever preferred_lft forever
inet6 fe80::d48a:40ff:fe30:e308/64 scope link
valid_lft forever preferred_lft forever
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ee brd ff:ff:ff:ff:ff:ff
inet 169.254.114.74/16 brd 169.254.255.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fe80::4f1b:d468:f188:19ee/64 scope link
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ef brd ff:ff:ff:ff:ff:ff
inet 192.168.1.8/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
valid_lft 86384sec preferred_lft 75584sec
inet6 fe80::ed25:290d:d706:8ab2/64 scope link
valid_lft forever preferred_lft forever
4: ztks5s5bvz: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2800 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether d6:8a:40:30:e3:08 brd ff:ff:ff:ff:ff:ff
inet 192.168.192.43/24 brd 192.168.192.255 scope global ztks5s5bvz
valid_lft forever preferred_lft forever
inet6 fe80::d48a:40ff:fe30:e308/64 scope link
valid_lft forever preferred_lft forever
To add a static IPv6 address to eth0 use the following command:
pi@raspberrypi:~ $ sudo nano /etc/dhcpcd.conf
Remove the starting # from the following two lines and press Ctrl+x
then Yes and Enter:
interface eth0
static ip6_address=fd51:42f8:caae:d92e::ff/64
Now let us reboot our Raspberry Pi for this configuration to take effect with the following command:
pi@raspberrypi:~ $ sudo reboot
Once the system boots up again, let us check from the terminal window again the IP addresses with the following command:
pi@raspberrypi:~ $ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ee brd ff:ff:ff:ff:ff:ff
inet 169.254.114.74/16 brd 169.254.255.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fd51:42f8:caae:d92e::ff/64 scope global noprefixroute
valid_lft forever preferred_lft forever
inet6 fe80::4f1b:d468:f188:19ee/64 scope link
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ef brd ff:ff:ff:ff:ff:ff
inet 192.168.1.8/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
valid_lft 85542sec preferred_lft 74742sec
inet6 fe80::ed25:290d:d706:8ab2/64 scope link
valid_lft forever preferred_lft forever
4: ztks5s5bvz: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2800 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether d6:8a:40:30:e3:08 brd ff:ff:ff:ff:ff:ff
inet 192.168.192.43/24 brd 192.168.192.255 scope global ztks5s5bvz
valid_lft forever preferred_lft forever
inet6 fe80::d48a:40ff:fe30:e308/64 scope link
valid_lft forever preferred_lft forever
Finally, we need to restrict the DHCP server for IPv6 with the following configuration file:
pi@raspberrypi:~ $ sudo nano /etc/default/isc-dhcp-server
Modify this configuration file so that it looks like this then press Ctrl+x then Yes and Enter:
# Defaults for isc-dhcp-server (sourced by /etc/init.d/isc-dhcp-server)
# Path to
dhcpd's config file (default: /etc/dhcp/dhcpd.conf).
#DHCPDv4_CONF=/etc/dhcp/dhcpd.conf
DHCPDv6_CONF=/etc/dhcp/dhcpd6.conf
# Path to
dhcpd's PID file (default: /var/run/dhcpd.pid).
#DHCPDv4_PID=/var/run/dhcpd.pid
DHCPDv6_PID=/var/run/dhcpd6.pid
#
Additional options to start dhcpd with.
# Don't use options -cf or -pf here; use DHCPD_CONF/ DHCPD_PID instead
OPTIONS="-6"
# On what
interfaces should the DHCP server (dhcpd) serve DHCP requests?
# Separate multiple interfaces with spaces, e.g. "eth0 eth1".
#INTERFACESv4=""
INTERFACESv6="eth0"
pi@raspberrypi:~ $ sudo nano /etc/dhcpcd.conf
interface eth0
static ip6_address=fd51:42f8:caae:d92e::ff/64
Now let us reboot our Raspberry Pi for this configuration to take effect with the following command:
pi@raspberrypi:~ $ sudo reboot
Once the system boots up again, let us check from the terminal window again the IP addresses with the following command:
pi@raspberrypi:~ $ ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ee brd ff:ff:ff:ff:ff:ff
inet 169.254.114.74/16 brd 169.254.255.255 scope global noprefixroute eth0
valid_lft forever preferred_lft forever
inet6 fd51:42f8:caae:d92e::ff/64 scope global noprefixroute
valid_lft forever preferred_lft forever
inet6 fe80::4f1b:d468:f188:19ee/64 scope link
valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether dc:a6:32:c6:4f:ef brd ff:ff:ff:ff:ff:ff
inet 192.168.1.8/24 brd 192.168.1.255 scope global dynamic noprefixroute wlan0
valid_lft 85542sec preferred_lft 74742sec
inet6 fe80::ed25:290d:d706:8ab2/64 scope link
valid_lft forever preferred_lft forever
4: ztks5s5bvz: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 2800 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether d6:8a:40:30:e3:08 brd ff:ff:ff:ff:ff:ff
inet 192.168.192.43/24 brd 192.168.192.255 scope global ztks5s5bvz
valid_lft forever preferred_lft forever
inet6 fe80::d48a:40ff:fe30:e308/64 scope link
valid_lft forever preferred_lft forever
Please notice that we have our shiny new static IPv6 address showing up under
eth0 now.
Now we need to install a DHCP server with the following command:
pi@raspberrypi:~ $ sudo apt install isc-dhcp-server
Do not bother too much that it failed to load upon installation. We just need to configure it first with the following command:
pi@raspberrypi:~ $ sudo nano /etc/dhcp/dhcpd6.conf
Add these lines to the end of the file and press Ctrl+x then Yes and Enter:
Now we need to install a DHCP server with the following command:
pi@raspberrypi:~ $ sudo apt install isc-dhcp-server
Do not bother too much that it failed to load upon installation. We just need to configure it first with the following command:
pi@raspberrypi:~ $ sudo nano /etc/dhcp/dhcpd6.conf
Add these lines to the end of the file and press Ctrl+x then Yes and Enter:
option space docsis code width 2 length width 2;
option docsis.cablelabs-syslog-servers code 34 = array of ip6-address;
option docsis.time-servers code 37 = array of ip6-address;
option docsis.time-offset code 38 = signed integer 32;
option docsis.ccap-core code 61 = array of ip6-address;
option vsio.docsis code 4491 = encapsulate docsis;
option docsis.cablelabs-syslog-servers fd51:42f8:caae:d92e::ff;
option docsis.time-servers fd51:42f8:caae:d92e::ff;
option docsis.time-offset -25200;
option docsis.ccap-core fd51:42f8:caae:d92e::ff;
subnet6 fd51:42f8:caae:d92e::0/64 {
range6 fd51:42f8:caae:d92e::fe fd51:42f8:caae:d92e::fe;
}
Finally, we need to restrict the DHCP server for IPv6 with the following configuration file:
pi@raspberrypi:~ $ sudo nano /etc/default/isc-dhcp-server
Modify this configuration file so that it looks like this then press Ctrl+x then Yes and Enter:
# Defaults for isc-dhcp-server (sourced by /etc/init.d/isc-dhcp-server)
#DHCPDv4_CONF=/etc/dhcp/dhcpd.conf
DHCPDv6_CONF=/etc/dhcp/dhcpd6.conf
#DHCPDv4_PID=/var/run/dhcpd.pid
DHCPDv6_PID=/var/run/dhcpd6.pid
# Don't use options -cf or -pf here; use DHCPD_CONF/ DHCPD_PID instead
OPTIONS="-6"
# Separate multiple interfaces with spaces, e.g. "eth0 eth1".
#INTERFACESv4=""
INTERFACESv6="eth0"
Now we need to restart the DHCP service with the following commands:
pi@raspberrypi:~ $ sudo systemctl stop isc-dhcp-server.service
pi@raspberrypi:~ $ sudo systemctl start isc-dhcp-server.service
pi@raspberrypi:~ $ sudo systemctl status isc-dhcp-server.service
● isc-dhcp-server.service - LSB: DHCP server
Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
Active: active (running) since Tue 2020-09-22 00:38:12 BST; 6s ago
Docs: man:systemd-sysv-generator(8)
Process: 2004 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=0/SUCCESS)
Tasks: 1 (limit: 3862)
CGroup: /system.slice/isc-dhcp-server.service
└─2013 /usr/sbin/dhcpd -6 -q -cf /etc/dhcp/dhcpd6.conf eth0
Sep 22
00:38:10 raspberrypi systemd[1]: Starting LSB: DHCP server...
Sep 22 00:38:10 raspberrypi isc-dhcp-server[2004]: Launching IPv6 server only.
Sep 22 00:38:10 raspberrypi dhcpd[2013]: Wrote 0 NA, 0 TA, 0 PD leases to lease file.
Sep 22 00:38:10 raspberrypi dhcpd[2013]: Bound to *:547
Sep 22 00:38:10 raspberrypi dhcpd[2013]: Server starting service.
Sep 22 00:38:12 raspberrypi isc-dhcp-server[2004]: Starting ISC DHCPv6 server: dhcpd6.
Sep 22 00:38:12 raspberrypi systemd[1]: Started LSB: DHCP server.
We can now find dhcpv6-server in the list of services:
pi@raspberrypi:~ $ sudo netstat -lp | grep dhcpv6-server
udp6 0 0 [::]:dhcpv6-server [::]:* 654/dhcpd
pi@raspberrypi:~ $ sudo systemctl stop isc-dhcp-server.service
pi@raspberrypi:~ $ sudo systemctl start isc-dhcp-server.service
pi@raspberrypi:~ $ sudo systemctl status isc-dhcp-server.service
● isc-dhcp-server.service - LSB: DHCP server
Loaded: loaded (/etc/init.d/isc-dhcp-server; generated)
Active: active (running) since Tue 2020-09-22 00:38:12 BST; 6s ago
Docs: man:systemd-sysv-generator(8)
Process: 2004 ExecStart=/etc/init.d/isc-dhcp-server start (code=exited, status=0/SUCCESS)
Tasks: 1 (limit: 3862)
CGroup: /system.slice/isc-dhcp-server.service
└─2013 /usr/sbin/dhcpd -6 -q -cf /etc/dhcp/dhcpd6.conf eth0
Sep 22 00:38:10 raspberrypi isc-dhcp-server[2004]: Launching IPv6 server only.
Sep 22 00:38:10 raspberrypi dhcpd[2013]: Wrote 0 NA, 0 TA, 0 PD leases to lease file.
Sep 22 00:38:10 raspberrypi dhcpd[2013]: Bound to *:547
Sep 22 00:38:10 raspberrypi dhcpd[2013]: Server starting service.
Sep 22 00:38:12 raspberrypi isc-dhcp-server[2004]: Starting ISC DHCPv6 server: dhcpd6.
Sep 22 00:38:12 raspberrypi systemd[1]: Started LSB: DHCP server.
We can now find dhcpv6-server in the list of services:
pi@raspberrypi:~ $ sudo netstat -lp | grep dhcpv6-server
udp6 0 0 [::]:dhcpv6-server [::]:* 654/dhcpd
There are two more services left to configure. For the time service let us
install xinetd with the following command:
pi@raspberrypi:~ $ sudo apt install xinetd
To enable time service on udp, alter disable from yes to no in the following config file and then press Ctrl+x then Yes and Enter:
pi@raspberrypi:~ $ sudo nano /etc/xinetd.d/time-udp
Bouncing xinetd will bring up time service:
pi@raspberrypi:~ $ sudo systemctl stop xinetd.service
pi@raspberrypi:~ $ sudo systemctl start xinetd.service
pi@raspberrypi:~ $ sudo netstat -lp | grep time
udp6 0 0 [::]:time [::]:* 1267/xinetd
Finally, let us add TFTP service with the following command:
pi@raspberrypi:~ $ sudo apt install tftpd
pi@raspberrypi:~ $ sudo apt install xinetd
To enable time service on udp, alter disable from yes to no in the following config file and then press Ctrl+x then Yes and Enter:
pi@raspberrypi:~ $ sudo nano /etc/xinetd.d/time-udp
Bouncing xinetd will bring up time service:
pi@raspberrypi:~ $ sudo systemctl stop xinetd.service
pi@raspberrypi:~ $ sudo systemctl start xinetd.service
pi@raspberrypi:~ $ sudo netstat -lp | grep time
udp6 0 0 [::]:time [::]:* 1267/xinetd
Finally, let us add TFTP service with the following command:
pi@raspberrypi:~ $ sudo apt install tftpd
We need to add the following configuration file:
pi@raspberrypi:~ $ sudo nano /etc/xinetd.d/tftp
pi@raspberrypi:~ $ sudo nano /etc/xinetd.d/tftp
Add these lines to this configuration file and then press Ctrl+x
then Yes and Enter:
service tftp
{
protocol = udp
port = 69
socket_type = dgram
wait = yes
user = nobody
server = /usr/sbin/in.tftpd
server_args = /tftpboot
disable = no
}
service tftp
{
protocol = udp
port = 69
socket_type = dgram
wait = yes
user = nobody
server = /usr/sbin/in.tftpd
server_args = /tftpboot
disable = no
}
Bouncing xinetd again will bring up tftp service:
pi@raspberrypi:~ $ sudo systemctl stop xinetd.service
pi@raspberrypi:~ $ sudo systemctl start xinetd.service
pi@raspberrypi:~ $ sudo netstat -lp | grep tftp
udp6 0 0 [::]:tftp [::]:* 1513/xinetd
To create default directory for tftp add these commands:
[Service]
ExecStartPre=/bin/sleep 10
pi@raspberrypi:~ $ sudo systemctl stop xinetd.service
pi@raspberrypi:~ $ sudo systemctl start xinetd.service
pi@raspberrypi:~ $ sudo netstat -lp | grep tftp
udp6 0 0 [::]:tftp [::]:* 1513/xinetd
To create default directory for tftp add these commands:
pi@raspberrypi:~
$ sudo mkdir /tftpboot
pi@raspberrypi:~ $ sudo chmod -R 777 /tftpboot
pi@raspberrypi:~ $ sudo chown -R nobody /tftpboot
pi@raspberrypi:~ $ sudo chmod -R 777 /tftpboot
pi@raspberrypi:~ $ sudo chown -R nobody /tftpboot
This concludes the installation. However, isc-dhcp-server might not start automatically if wifi acquires carrier faster then eth0. To work around this issue:
pi@raspberrypi:~ $ sudo systemctl edit isc-dhcp-server.service[Service]
ExecStartPre=/bin/sleep 10
This adds 10 seconds delay before isc-dhcp-server starts after wifi has come up. This is usually enough for eth0 also to acquire carrier.
With the courtesy of my colleague in the US, I can share a picture of this lab:
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