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Network

Are your packets stuck in the door? Don’t worry, here is a quick guide to resolve any problems.

Step 1: Check the basics

  • Ethernet cable plugged in firmly
  • Link light on your PC or laptop
  • Disable VPNs, custom firewalls, or network tools
  • Please don’t:
    • Plug in your own switches or routers
    • Share internet from your device
    • Run DHCP servers or network tools

Step 2: Check if you’re online

  • Open the LAN portal (spawn.ctrl-alt-gg.hu )
  • If it loads:
  • If it doesn’t load:
    • Try unplugging and reconnecting the cable
    • Try a different port
    • Try Wi-Fi
      • Wi-Fi has the same access as wired LAN (games and services work the same)

Advanced users: if you know how, try pinging your gateway. If that works, your local connection is fine.

Step 3: Can you reach LAN services?

  • Game downloads slow or failing?
    • Check server status page (servers.ctrl-alt-gg.hu )
    • One game server unreachable?
      • Likely that server is restarting or full
    • Everything broken?
      • Probably a wider issue, tell staff

Step 4: Quick local checks

  • Restart your network adapter
  • Renew IP address (or reboot)
  • Make sure your device is set to automatic IP (DHCP)
    • Manual IPs will not work on this network
  • If your port suddenly goes dead after working:
    • You may have connected too many devices
    • Tell staff to re-enable the port

Step 5: When to ask for help

  • Tell staff if:
    • You have no network at all
    • You can open the portal but nothing else works
    • Multiple people around you have the same issue

Most issues fall into one of three areas:

  • Your device or cable
  • The access switch you’re connected to
  • A specific server or service

Staff can usually identify which within minutes.

When asking, say

  • Wired or Wi-Fi
  • What works, what doesn’t
  • Your device type (PC / laptop / console) and operating system

The following section is for enthusiasts, if you want to know how our network works you’re in the right place.

This LAN is built as a simple routed core with clean separation of roles, optimized for reliability and fast fault isolation. High-level layout

  • Internet -> Juniper SRX340 firewall -> Arista DCS-7050SX L3 core -> Juniper EX3300 access switches
  • All inter-device links use /31 point-to-point routing, no spanning-tree dependency between switches.
  • Access switches are pure edge devices; routing decisions happen at the core.

Addressing & segmentation

Access VLANs (140-150)

  • Guest devices on the same switch are on a shared LAN segment.
  • Do not expose services you don’t want others to see.
  • DHCP, internet + LAN services only
  • Future: No access to management

Services VLAN (130)

  • Game servers, file host, DNS (Unbound), DHCP (Kea)

Management VLAN (128)

  • Network devices only
  • Future: no guest access

Wireless VLAN (132)

  • Same policy as access VLANs

IoT VLAN (131)

  • Present: Same as access VLANs
  • Future: Internet only, isolated from everything else

Traffic flow

  • Clients -> access switch -> core gateway -> firewall -> internet
  • LAN services stay inside the core, never hairpin through the firewall.
  • Firewall policies are permissive internally; security focus is on edge protection and NAT.

Design intent

  • No L2 complexity
  • Predictable failure domains
  • Fast “is it access / core / firewall?” troubleshooting
  • Everything observable from server status + basic ping tests