How To Install obfs4 on Fedora 34

obfs4 is The obfourscator, a pluggable transport for Tor

Introduction

In this tutorial we learn how to install obfs4 on Fedora 34.

What is `obfs4`

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.

We can use yum or dnf to install obfs4 on Fedora 34. In this tutorial we discuss both methods but you only need to choose one of method to install obfs4.

Install obfs4 on Fedora 34 Using dnf

Update yum database with dnf using the following command.

sudo dnf makecache --refresh

The output should look something like this:

Fedora 34 - x86_64                               20 kB/s | 6.6 kB     00:00
Fedora 34 openh264 (From Cisco) - x86_64        1.4 kB/s | 989  B     00:00
Fedora Modular 34 - x86_64                       68 kB/s | 6.5 kB     00:00
Fedora 34 - x86_64 - Updates                    3.5 kB/s | 6.2 kB     00:01
Fedora Modular 34 - x86_64 - Updates             17 kB/s | 5.9 kB     00:00
Metadata cache created.

After updating yum database, We can install obfs4 using dnf by running the following command:

sudo dnf -y install obfs4

Install obfs4 on Fedora 34 Using yum

Update yum database with yum using the following command.

sudo yum makecache --refresh

The output should look something like this:

Fedora 34 - x86_64                               20 kB/s | 6.6 kB     00:00
Fedora 34 openh264 (From Cisco) - x86_64        1.4 kB/s | 989  B     00:00
Fedora Modular 34 - x86_64                       68 kB/s | 6.5 kB     00:00
Fedora 34 - x86_64 - Updates                    3.5 kB/s | 6.2 kB     00:01
Fedora Modular 34 - x86_64 - Updates             17 kB/s | 5.9 kB     00:00
Metadata cache created.

After updating yum database, We can install obfs4 using yum by running the following command:

sudo yum -y install obfs4

How To Uninstall obfs4 on Fedora 34

To uninstall only the obfs4 package we can use the following command:

sudo dnf remove obfs4

obfs4 Package Contents on Fedora 34

/etc/tor
/etc/tor/obfs4.torrc
/usr/bin/obfs4proxy
/usr/lib/.build-id
/usr/lib/.build-id/8e
/usr/lib/.build-id/8e/79c0e8bbe364b49151cb9c5f6931976a2b0f63
/usr/share/doc/obfs4
/usr/share/doc/obfs4/ChangeLog
/usr/share/doc/obfs4/README.md
/usr/share/doc/obfs4/doc
/usr/share/doc/obfs4/doc/obfs4-spec.txt
/usr/share/doc/obfs4/doc/obfs4proxy.1
/usr/share/licenses/obfs4
/usr/share/licenses/obfs4/LICENSE
/usr/share/licenses/obfs4/LICENSE-GPL3.txt
/usr/share/man/man1/obfs4proxy.1.gz

References

obfs4 website

Summary

In this tutorial we learn how to install obfs4 on Fedora 34 using yum and dnf.