GetPageSpeed Extras

obfs4

How to install obfs4 on AlmaLinux, Rocky Linux & RHEL

The obfourscator, a pluggable transport for Tor

License: GPL-3.0-only AND LicenseRef-Callaway-BSD https://gitlab.com/yawning/obfs4

Availability

Distro aarch64 noarch x86_64 Version
RHEL 10
RHEL 9 0.0.14
RHEL 8
RHEL 7
RHEL 6

Description

This is a look-like nothing obfuscation protocol that incorporates ideas and concepts from Philipp Winter's ScrambleSuit protocol. The obfs naming was chosen primarily because it was shorter, in terms of protocol ancestry obfs4 is much closer to ScrambleSuit than obfs2/obfs3. The notable differences between ScrambleSuit and obfs4: * The handshake always does a full key exchange (no such thing as a Session Ticket Handshake). * The handshake uses the Tor Project's ntor handshake with public keys obfuscated via the Elligator 2 mapping. * The link layer encryption uses NaCl secret boxes (Poly1305/XSalsa20). As an added bonus, obfs4proxy also supports acting as an obfs2/3 client and bridge to ease the transition to the new protocol.

Compatible with all RHEL-based distributions, including CentOS, AlmaLinux, Oracle Linux, Rocky Linux, etc.

Install

obfs4 on AlmaLinux / Rocky Linux / Oracle Linux / RHEL 9

sudo dnf -y install https://extras.getpagespeed.com/release-latest.rpm
sudo dnf -y install obfs4

Package downloads require an active GetPageSpeed subscription — one repository for obfs4 and 3,000+ more packages across every maintained Enterprise Linux release.

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Frequently asked questions

How do I install obfs4 on AlmaLinux, Rocky Linux or RHEL?

Add the GetPageSpeed repository, then run: sudo dnf -y install obfs4 (use yum on EL7). The same package works on AlmaLinux, Rocky Linux, Oracle Linux, CentOS Stream and RHEL.

Which Enterprise Linux versions is obfs4 available for?

obfs4 is available for RHEL 9 and the matching AlmaLinux, Rocky Linux and Oracle Linux releases.

Is obfs4 compatible with Rocky Linux, Oracle Linux and CentOS Stream?

Yes. The RPM is built for Enterprise Linux and is binary-compatible across all RHEL rebuilds of the same major version, including AlmaLinux, Rocky Linux, Oracle Linux and CentOS Stream.

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