vidhyaalakshmi.md: add more steps for an OpenBSD router
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@ -7,6 +7,8 @@ toc: true
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---
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# Debian
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## Basic setup
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### Set hostname
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@ -50,7 +52,7 @@ MY_IPV4_GTWY=""
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sudo nmcli connection modify "${NETWORK_CONNECTION}" ipv4.addresses "${MY_IPV4_ADDR}"
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sudo nmcli connection modify "${NETWORK_CONNECTION}" ipv4.dns "${IPV4_DNS}"
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sudo nmcli connection modify "${NETWORK_CONNECTION}" ipv4.gateway "${MY_IPV4_GTWY"
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sudo nmcli connection modify "${NETWORK_CONNECTION}" ipv4.gateway "${MY_IPV4_GTWY}"
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sudo nmcli connection modify "${NETWORK_CONNECTION}" ipv4.ignore-auto-dns yes
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sudo nmcli connection modify "${NETWORK_CONNECTION}" ipv4.method manual
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```
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@ -100,4 +102,309 @@ systemctl reboot
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---
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# OpenBSD
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## Installation
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```sh
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WAN_INTERFACE= #vio0 in VM
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LAN_INTERFACE= #vio1 in VM
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```
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- Terminal type? [vt220] **`vt220`**
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- Chose your keyboard layout ('?' or 'L' for list) [default] **`us`**
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- System hostname? (short form, e.g. 'foo') **`vidhyalakshmi`**
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- Which network interface do you wish to configure? (or 'done') [abc0] **`${WAN_INTERFACE}`**
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- IPv4 address for `${WAN_INTERFACE}` (or 'autoconf' or 'none') [autoconf] **`autoconf`**
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- IPv6 address for `${WAN_INTERFACE}` (or 'autoconf' or 'none') [autoconf] **`none`**
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- Which network interface do you wish to configure? (or 'done') [done] **`done`**
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- Start sshd(8) by default? [yes] **`yes`**
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- Setup a user? (enter a lower-case loginname, or 'no') [no] **`pratham`**
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- Full name for the user pratham? [pratham] **`Pratham Patel`**
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- Allow root ssh login? (yes, no, prohibit-password) [no] **`no`**
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- What timezone are you in? ('?' for list) [Asia/Kolkata] **`Asia/Kolkata`**
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- Which disk is the root disk? ('?' for details) **`?`**
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- MBR has invalid signature; not showing it. Use (W)hole disk or (E)dit the MBR? [whole] **`W`**
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- Use (A)uto layout, (E)dit auto layout, or create (C)ustom layout? [a] **`A`**
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- Which disk do you wish to initialize? (or 'done') [done] **`done`**
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- Let's install the sets! Location of sets? (disk http nfs or 'done') [http] **`http`**
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- HTTP proxy URL? (e.g. 'http://proxy:8080', or 'none') [none] **`none`**
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- HTTP Server? (hostname, list#, 'done' or '?') [cdn.openbsd.org] **`cdn.openbsd.org`**
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- Server directory? [pub/OpenBSD/x.y/riscv64] **`pub/OpenBSD/x.y/riscv64`**
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- Sets: **`-game* -x*`**
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## Install updates
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```bash
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fw_update
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pkg_check -Fimv
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pkg_add -imUuVv
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sysupgrade
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```
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## Basic setup
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### Timezone
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```bash
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ln -sf /usr/share/zoneinfo/Asia/Kolkata /etc/localtime
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```
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### SSH Config
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```bash
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echo "ListenAddress 10.0.0.1" >> /etc/ssh/sshd_config
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```
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### Doas setup
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```bash
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echo "permit keepenv pratham" > /etc/doas.conf
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```
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## Reboot
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```bash
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shutdown -r now
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```
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## Install new packages
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```bash
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pkg_add -imUuVv bash bash-completion curl git htop iftop iperf iperf3 pftop vim--no_x11 vnstat wget wireguard-tools
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```
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## Router setup
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Heavily inspired by the official [OpenBSD documentation](https://www.openbsd.org/faq/pf/example1.html)/guide.
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### Setup networking
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Use the `10.0.0.0/8` subnet for `$WAN_INTERFACE`.
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```bash
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WAN_INTERFACE= #em0 or vio0 or something else...
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LAN_INTERFACE= #em1 or vio1 or something else...
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```
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```bash
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WAN_IF_CONF="inet MY_STATIC_IPv4_HERE 255.255.255.224 NONE
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!route add default MY_ISPs_GATEWAY_HERE
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inet6 autoconf"
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LAN_IF_CONF="inet 10.0.0.1 255.0.0.0 10.0.0.255"
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```
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```bash
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echo 'net.inet.ip.forwarding=1' >> /etc/sysctl.conf
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# IPv6 $(echo "net.inet6.ip6.forwarding=1" >> /etc/sysctl.conf)
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echo ${WAN_IF_CONF} > /etc/hostname.${WAN_INTERFACE}
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echo ${LAN_IF_CONF} > /etc/hostname.${LAN_INTERFACE}
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```
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### DHCP
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```bash
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rcctl enable dhcpd
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rcctl set dhcpd flags em1 athn0
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```
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```bash
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DHCPD_CONF_CONTENTS="# my main devices go on this subnet; phone, laptop, computer, rpis, etc...
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subnet 10.0.0.0 netmask 255.255.255.0 {
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option routers 10.0.0.1;
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option domain-name-servers 10.0.0.1;
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range 10.0.0.10 10.0.0.100;
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# static LAN IP for my primary phone
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host barbet {
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fixed-address 10.0.0.11;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for old phone
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host merlin {
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fixed-address 10.0.0.12;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for old-old phone
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host vince {
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fixed-address 10.0.0.13;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my MBP (Wi-Fi)
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host vidhata {
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fixed-address 10.0.0.21;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my Desktop/Workstation
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host harinarayan {
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fixed-address 10.0.0.22;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my MBP (eth dongle)
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host bramha {
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fixed-address 10.0.0.23;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my Raspberry Pi 4 Model B 4GB
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host adinath {
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fixed-address 10.0.0.31;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my Raspberry Pi 4 Model B 8GB
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host balakrishna {
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fixed-address 10.0.0.32;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my primary WAP
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host rahu {
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fixed-address 10.0.0.90;
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hardware ethernet 00:00:00:00:00:00;
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}
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}
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# IoT devices go on this subnet; extra WAP, Android set-top box, etc...
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subnet 10.0.10.0 netmask 255.255.255.0 {
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option routers 10.0.10.1;
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option domain-name-servers 10.0.10.1;
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range 10.0.10.10 10.0.10.100;
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# static LAN IP for my Android set top box
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host vibhishan {
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fixed-address 10.0.10.11;
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hardware ethernet 00:00:00:00:00:00;
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}
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# static LAN IP for my guest WAP
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host ketu {
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fixed-address 10.0.10.90;
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hardware ethernet 00:00:00:00:00:00;
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}
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}
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"
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```
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```bash
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echo ${DHCPD_CONF_CONTENTS} > /etc/dhcpd.conf
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```
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### Firewall
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```bash
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rcctl enable pf # not really necessary, but OCD
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```
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```bash
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WAN_INTERFACE= #em0 or vio0 or something else...
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LAN_INTERFACE= #em1 or vio1 or something else...
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```
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```bash
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PF_CONF_CONTENTS="# set macros for LAN_IF and WAN_IF
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LAN_IF = "${LAN_INTERFACE}"
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WAN_IF = "${WAN_INTERFACE}"
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# network hosts; look at "/etc/dhcpd.conf" for what they are
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host_barbet = "10.0.0.11"
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host_merlin = "10.0.0.12"
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host_vince = "10.0.0.13"
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host_vidhata = "10.0.0.21"
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host_harinarayan = "10.0.0.22"
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host_bramha = "10.0.0.23"
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host_adinath = "10.0.0.31"
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host_balakrishna = "10.0.0.32"
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host_rahu = "10.0.0.90"
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host_ketu = "10.0.10.11"
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host_vibhishan = "10.0.10.90"
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host_pappa = "10.0.10."
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host_mummy = "10.0.10."
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host_kaki = "10.0.10."
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host_kaka = "10.0.10."
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host_baa = "10.0.10."
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host_dada = "10.0.10."
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host_ = "10.0.10."
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host_ = "10.0.10."
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host_ = "10.0.10."
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#host_ = "10.0.0."
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#host_ = "10.0.0."
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#host_ = "10.0.0."
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#host_ = "10.0.0."
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#host_ = "10.0.0."
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hosts_protected "{" $host_barbet $host_merlin $host_vidhata $host_harinarayan $host_adinath $host_balakrishna $ "}"
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hosts_known_guests "{" $host_vince $host_rahu $host_ketu "}"
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hosts_totally_isolated "{" $host_vibhishan "}"
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# table for blocking IP addresses
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# yet to be populated
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#table <assholes> const { x.x.x.x, y.y.y.y }
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# table for my VLANs
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table <vlan_protected_tab> const { 10.0.0.0/8 }
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table <vlan_isolated_tab> const { 10.0.10.0/24 }
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#table <vlan__tab> const { }
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# don't need to route any traffic from loop-back interface
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set skip on lo0
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# don't respond to the sendor if their packets have been blocked
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set block-policy drop
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# block everything
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block drop all
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# passing packets LAN <-> LAN
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pass in on $LAN_IF from $LAN_IF:network to any keep state
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# allow OpenBSD to connect to the internet (package management, etc)
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# pass WAN network to WAN without modification
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pass out on $WAN_IF from $WAN_IF:network to any keep state
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# pass LAN network OUT to WAN using Network Address Translation
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pass out on $WAN_IF from $LAN_IF:network to any nat-to ($WAN_IF) keep state
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"
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```
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```bash
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echo ${PF_CONF_CONTENTS} > /etc/pf.conf
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pfctl -nf /etc/pf.conf && pfctl -f /etc/pf.conf
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```
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### DNS
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```bash
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rcctl enable unbound
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```
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```bash
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```
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---
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### Monitoring
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```bash
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systat ifstat
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systat netstat
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netstat -an
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pftop
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iftop
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vnstatd -d && vnstat
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tcpdump
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```
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