1 # Network infrastructure
5 NOC operates a number of networks, available as tagged VLANs on the core switches:
7 | Name | ID | DNS | CIDR | Comment |
8 |----------|-----|-----|------------------------------------|--------------------------------------|
9 | realfunk | 6 | n | 192.168.6.0/24 | realfunk management network |
10 | mgmt | 32 | y | 192.168.32.0/24 | management network |
11 | iot | 33 | y | 192.168.33.0/24 | IoT devices, room infrastructure |
12 | svc | 34 | y | 192.168.34.0/24 | Services LAN, see below |
13 | [HAMNET] | 44 | n | 44.0.0.0/8 | Amateur Radio Digital Communications |
14 | guests | 127 | y | 192.168.127.0/24 | Exposed through the “realraum” SSIDs |
15 | members | 128 | y | 89.106.211.32/27, 192.168.128.0/24 | Accessed with per-member credentials |
16 | pub | 130 | y | 89.106.211.64/27 | Publicly-available services |
17 | UPC | 168 | n | <dynamically assigned> | UPC DOCSIS Internet |
18 | `0xFF` | 255 | n | 10.12.240.240/28 | Funkfeuer VLAN |
20 [HAMNET]: https://wiki.oevsv.at/index.php/Kategorie:Digitaler_Backbone
23 ### `realfunk` -- realfunk management network
25 This network will be used by realfunk to communicate between the ground station
26 and things like SDR or similar stuff mounted on the roof. For now this network
27 does not need DNS or connection to any other network. There also won't be any
28 network services such as DHCP or recursive DNS. realfunk will probably run their
32 ### `svc` -- Services LAN
34 This network is intended for services that aren't directly exposed to users
35 (be they humans or machines); this includes services exposed through a frontend
36 (like realraum web services) and services only meant to be consumed by another
37 service (like a database server).
40 ### `pub` -- Publicly-available services
42 This network is intended for services that can be consumed by non-NOC systems,
43 including our HTTP(S) frontend -- `entrance`, `mqtt`, ...
45 Services in this network can restrict availability, for instance by only
46 allowing clients connecting from our LANs, or by requiring authentication.
48 No RFC 1918 subnet is used on this network, only `89.106.211.64/27`.
53 - The DNS zone for a given network is `NET.realraum.at`, with the exception of
54 `pub` (which uses `realraum.at`) and VLANs which have no `realraum.at` zone.
55 - When a network uses RFC 1918 IP space, it is the 192.168.VID.0/24 subnet;
56 for instance, the `iot` network has id 33 and uses the 192.168.33.0/24 subnet.
57 - The gateway for a network is on the last IP for the subnet.
60 ### Routing and firewall rules
62 This network diagram represents networks, and the connection flows between them:
63 an arrow from A to B means that a connection can be opened from network A to
64 network B. In all cases, a subset of ICMP (ECHO, ...) is allowed.
66 Note that any given system might have interfaces in several of these networks.
68 [[!img Network/overview.svg alt="r³ network overview"]]
73 Each location has a single AP, `ap{0,1}.mgmt.realraum.at`, which provides SSIDs
74 for the IoT network (`realstuff`) and the LAN (`realraum` and `realraum5`);
75 we use Ubiquity hardware running OpenWRT.
80 The switches have hostnames `sw{0,1}.mgmt.realraum.at`, and the WiFi access
81 points are similarly `ap{0,1}.mgmt.realraum.at`. `0` denotes the main room, and
82 `1` denotes the second appartment.
87 r1w2 has two fiber connections: one to the main room, and one to the radio room.
88 (We use fiber to avoid creating a ground loop between the locations.)
90 In r1w2, we have a rack hosting a number of devices:
92 - the patch panel and core switch (`sw1.mgmt.realraum.at`) for W2;
93 - the `alfred` virtualization server;
94 - miscelaneous devices:
96 - some Raspberry Pi belonging to members;
99 **Note:** members setting up devices that only need power and network access
100 should do so in this rack (or even better, run a VM or a container
106 realfunk receives the VLANs trunked on a single fiber; the switch there, `sw2`,
107 provides untagged ports on guests, `0xFF`, and HAMNET, which are labelled on the
108 device. Moreover, a single port (5) has the untagged guests LAN, along with
109 tagged HAMNET packets, used by the desktop computer there.
111 Moreover, there is a Funkfeuer node there; it *does not* advertise the realraum
117 The main room has its patch panel and core switch (`sw0.mgmt.realraum.at`) in
118 Cx. The patch panel has a fiber link to r2w1, and a copper link to an external
119 antenna for our link to Funkfeuer.
121 The network shelf in Cx also houses some important devices:
124 - `smsgw.mgmt.realraum.at`, plus its mobile phone;
125 - the PoE injectors for `ap0.mgmt.realraum.at` and `sch24.r3.ffgraz.net`;
126 - `test.r3.ffgraz.net`, which is a test Funkfeuer node.