Highly Performant & Scalable Ultima Online Server Emulator
https://www.modernuo.com
c-sharpcsharpcsharp-coredotnetdotnet-coreemulatorgplgplv3mmommo-enginemmorpgmmorpg-serveronlinerpgrunuoserverservuoultimaultima-onlineuo
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Adds tools/Export-IpBlocklist.ps1, the producer half of the in-app blocklist gate. It merges a thin, non-overlapping set of public IP threat feeds into one de-duplicated, bogon-filtered list and writes the plain-text file the shard reads via `blocklistFile`. Parsing is done in a compiled Add-Type hot loop because the anchor feed alone is ~4M lines; the output is streamed so millions of entries never become millions of strings. The file is written to a .tmp sibling and swapped with File.Replace, so the shard never observes a half-written list, and a total feed outage refuses to overwrite a good list with an empty one. Re-running is idempotent: the script exits without downloading anything while the list on disk is younger than -MinInterval (default 2h, the anchor feed's own refresh period), so a misconfigured scheduler cannot hammer the upstream feeds. Age comes from the `generated=` header the script writes, falling back to mtime, so no sidecar state file is needed. -Force overrides. `blocklistFile` now defaults to Configuration/ip-blocklist.txt instead of being empty. The gate stays inert while that file is absent, so this is a no-op for shards that never run the generator, and dropping the file in later is picked up by the existing poll with no restart. Two fixes this exposed: - FileBlocklist used the configured path verbatim despite documenting it as relative to Core.BaseDirectory, so a relative path resolved against the process working directory. Relative paths now resolve against BaseDirectory; absolute paths are honored so several shards can share one generated list. - A missing file is now the shipped default rather than a misconfiguration, so boot logs "inert: no blocklist at ..." instead of "loaded 0 entries". tools/ stays ignored except for this script. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> |
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| .config | ||
| .github | ||
| branding | ||
| dev-docs | ||
| Distribution/Data | ||
| Projects | ||
| tools | ||
| .cursorrules | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| AGENTS.md | ||
| azure-pipelines.yml | ||
| CLAUDE.md | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| Directory.Build.props | ||
| FAQ.md | ||
| GEMINI.md | ||
| global.json | ||
| LICENSE | ||
| ModernUO.slnx | ||
| publish.cmd | ||
| publish.ps1 | ||
| publish.sh | ||
| README.md | ||
| rider-settings.zip | ||
| Rules.ruleset | ||
| SPONSORS.md | ||
| stylecop.json | ||
| THIRD-PARTY-NOTICES | ||
| version.json | ||
ModernUO 
Ultima Online Server Emulator for the modern era!
Requirements
Supported Operating Systems
Required Frameworks
All Operating Systems
Windows
Development
Supported IDEs
Getting Started
- Install prerequisite requirements
- Clone this repository (or download the latest):
git clone https://github.com/modernuo/ModernUO.git
- Open
ModernUO.slnto start developing
Building/Publishing
Interactive Mode (Recommended for new users)
Run ./publish.cmd (Windows) or ./publish.sh (Linux/macOS) with no arguments to launch the guided build tool. It will:
- Check prerequisites (.NET SDK, native libraries)
- Walk you through configuration and platform selection
- Build and publish the server to the
Distributiondirectory - Show deployment instructions for cross-compiled builds
Command Line
./publish.cmd [release|debug] [os] [arch]
os- Supported operating systemsarchx64- Intel/AMD 64-bitarm64- ARM 64-bit
Linux Prerequisites
Fedora, CentOS, RHEL, AlmaLinux, Rocky, etc
dnf upgrade --refresh -y
# RHEL-family distributions (CentOS Stream, AlmaLinux, Rocky, RHEL) need CRB and EPEL enabled.
# Fedora skips this block.
dnf install -y dnf-plugins-core
dnf config-manager --set-enabled crb
dnf install -y epel-release
# Prerequisites
dnf install -y findutils libicu libdeflate-devel zstd libargon2-devel liburing-devel
Ubuntu, Debian, etc
apt-get update -y
apt-get install -y libicu-dev libdeflate-dev zstd libargon2-dev liburing-dev
OSX Requirements
brew install icu4c libdeflate zstd argon2
Running the Server
- Follow the publish instructions
- The
Distributiondirectory is portable — copy it to your production server for deployment - Run
ModernUO.exeordotnet ModernUO.dllfrom theDistributiondirectory - On first run, the server will prompt you to configure game data file locations
Troubleshooting / FAQ
- See FAQ
Want to sponsor?
Thank you for supporting us! You can find out how by visiting the sponsors page.
Collaborators
Thanks
- RunUO Team & Community
- Voxpire, the ServUO Team & Community
- Karasho, Jaedan and the ClassicUO Community
Development Tools & Plugins provided with ♥ by
Code Signing Policy
Free code signing provided by SignPath.io, certificate by SignPath Foundation.
This program will not transfer any information to other networked systems unless specifically requested by the user or the person installing or operating it
Teams & Roles
Approvers & Committers: Development Team