Tor Package for Linksys E4200

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Philipp87
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Joined: 23 Oct 2016
Posts: 8

PostPosted: Sun Oct 23, 2016 11:14    Post subject: Tor Package for Linksys E4200 Reply with quote
Hi all,

I am having a Linksys E4200 with kongmod release 06/07/14 (SVN: 22000:23903M) and am searching for a working optware repository / package which I could use to install Tor.

The one pre-set in opkg coming from http://downloads.openwrt.org/backfire/10.03.1/brcm47xx/packages/Packages.gz does not work. Tor errors out with "missing pointer..."

Entware packages coming from here http://pkg.entware.net/binaries/armv7/Packages are listed as incompatible in opkg.

The package repository mentioned in the dd-wrt wiki http://debian.keithdunnett.net/ddwrt/bcm53xx/packages/ is apparently taken offline.

Could someone recommend me a working repository please which I could use with a. m. configuration?

Thanks,
Philipp


Last edited by Philipp87 on Sun Oct 23, 2016 16:04; edited 1 time in total
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Per Yngve Berg
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Joined: 13 Aug 2013
Posts: 5197
Location: Akershus, Norway

PostPosted: Sun Oct 23, 2016 14:42    Post subject: Reply with quote
Isn't Tor available under Services->Services Tab?

It is on my Asus RT-AC66U (Build 30771)

ftp://ftp.dd-wrt.com/betas/2016/10-18-2016-r30771/broadcom_K3X/dd-wrt.v24-30771_NEWD-2_K3.x_mega-e4200.bin
Philipp87
DD-WRT Novice


Joined: 23 Oct 2016
Posts: 8

PostPosted: Sun Oct 23, 2016 15:44    Post subject: Reply with quote
Per Yngve Berg wrote:
Isn't Tor available under Services->Services Tab?


Unfortunately not. Apart from that the build is very good. No bugs so far and it runs for months without having the need to reboot, therefore I am reluctant to throw out the whole software just because of this.
Philipp87
DD-WRT Novice


Joined: 23 Oct 2016
Posts: 8

PostPosted: Sat Oct 12, 2019 17:43    Post subject: Re: Tor Package for Linksys E4200 Reply with quote
After a while I had the time to re-look at this issue and now it worked out, but just with tor version 0.2.8.17. All others up to the latest either do not cross-build or do not run. It looks like the code for MIPS32 processors is not well tested in those packages.

Here is how it worked for me which I hope will help someone who tries to compile something for the E4200.

Assumption is that you have an USB drive connected to the router which has a jffs partition and ideally also a swap partition as the RAM is short on that device.

Use cross compile toolchain in Ubuntu 16 x64:

Get the complete dd-wrt toolchain collection from here
http://download1.dd-wrt.com/dd-wrtv2/downloads/toolchains/toolchains.tar.xz
You just need this from that package, provided you are using dd-wrt v24 sp2: toolchain-mipsel_3.3.6_BRCM24

a) rename original linker executable:
mv /usr/bin/ld /usr/bin/ld-2

b) copy the toolchain files to /usr/bin
cp -r /home/myuserid/toolchain-mipsel_3.3.6_BRCM24 /usr/bin/

c) Use the Ubuntu update-alternatives to switch the symlinks to gcc and ld:
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 60 --slave /usr/bin/ld ld /usr/bin/ld-2
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/toolchain-mipsel_3.3.6_BRCM24/bin/mipsel-linux-uclibc-gcc 40 --slave /usr/bin/ld ld /usr/bin/toolchain-mipsel_3.3.6_BRCM24/bin/mipsel-linux-uclibc-ld
sudo update-alternatives --config gcc

d) use the include directory (header files) of the toolchain
mv /usr/include /usr/include-5
ln -s /usr/bin/toolchain-mipsel_3.3.6_BRCM24/include /usr/include

d) In order to switch back to standard gcc/ld:
Remove the toolchain folder and run:
sudo update-alternatives --config gcc

use original include files
unlink /usr/include
ln -s /usr/include-5 /usr/include


1) libevent

Download: https://github.com/libevent/libevent/releases/download/release-2.1.11-stable/libevent-2.1.11-stable.tar.gz
Unpack gzip -cd < libevent-2.1.11-stable.tar.gz | tar xvf -


./configure --prefix=/jffs/torlib --disable-samples --host=mips-openwrt-linux-uclibc --disable-shared --enable-static --with-pic
make
make install

Docs/Help:
https://libevent.org

2) openssl

Download: https://www.openssl.org/source/openssl-1.0.2t.tar.gz
Unpack gzip -cd < openssl-1.0.2t.tar.gz | tar xvf -


./Configure linux-mips32 no-shared no-dso --prefix=/jffs/torlib
make
make install


Docs/Help:
https://www.openssl.org/source/

3) zlib

Download: https://zlib.net/zlib-1.2.11.tar.gz
Unpack gzip -cd < zlib-1.2.11.tar.gz | tar xvf -

./configure --prefix=/jffs/torlib
make
make install

Docs/Help:
https://zlib.net/


4) tor

Download: https://www.torproject.org/download/tor/
Previous versions: https://archive.torproject.org/tor-package-archive/
Unpack gzip -cd < tor-0.2.8.17.tar.gz | tar xvf -

./configure --prefix=/jffs/tor --disable-gcc-hardening --enable-static-tor --with-libevent-dir=/jffs/torlib --with-openssl-dir=/jffs/torlib --with-zlib-dir=/jffs/torlib --host=mips-openwrt-linux-uclibc --disable-tool-name-check
make
make install

Tor Configuration

As above instruction creates a fully static tor, you just have to copy over the /jffs/tor folder to the router.

Besides the standard settings, I do recommend to enter the following into the torrc file:

DataDirectory /jffs/tor/var/lib/tor/
RunAsDaemon 1
AvoidDiskWrites 1


Last edited by Philipp87 on Sun Oct 13, 2019 8:26; edited 1 time in total
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 2359
Location: Texas, USA

PostPosted: Sun Oct 13, 2019 0:10    Post subject: Reply with quote
Why would you use the K24 toolchain? That makes no sense.
Philipp87
DD-WRT Novice


Joined: 23 Oct 2016
Posts: 8

PostPosted: Sun Oct 13, 2019 8:28    Post subject: Reply with quote
kernel-panic69 wrote:
Why would you use the K24 toolchain? That makes no sense.


Because I am using V24SP2 from Kong as this is the best performing version for this oldie.
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 2359
Location: Texas, USA

PostPosted: Sun Oct 13, 2019 11:25    Post subject: Reply with quote
Philipp87 wrote:
kernel-panic69 wrote:
Why would you use the K24 toolchain? That makes no sense.


Because I am using V24SP2 from Kong as this is the best performing version for this oldie.


It would've been easier to install FreshTomato mega-VPN.
Philipp87
DD-WRT Novice


Joined: 23 Oct 2016
Posts: 8

PostPosted: Sun Oct 13, 2019 12:39    Post subject: Reply with quote
kernel-panic69 wrote:

It would've been easier to install FreshTomato mega-VPN.


Do you have an E4200 with FreshTomato and could share your experience on stability, features and performance?

For me the whole package counts, not just if it has Tor.
kernel-panic69
DD-WRT Guru


Joined: 08 May 2018
Posts: 2359
Location: Texas, USA

PostPosted: Tue Oct 15, 2019 12:13    Post subject: Reply with quote
"An" equals about 5 these days. Currently, only one is being used to test DD-WRT public beta releases, one is being used for stock firmware development, and another is for FT development/testing. The other two are flashed with the last public beta of FT, and are spares. I personally have never had an issue with FT out of the box except a misconfiguration-induced problem. That's about where I'll stop my commentary because I've probably said too much already.
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