summary for situation described by issue60
labels Featured,Phase-Support

Table of Contents

Introduction
Details

Introduction

security patch, helpful side keeper

Details

Use iptables for network blocking

use this line

iptables -A OUTPUT -m owner --uid-owner judge -j DROP

to block any network out going ip package from judge_client(not include PING) REMEMBER to save it using http://www.cyberciti.biz/faq/how-do-i-save-iptables-rules-or-settings/

Update all code to at least r1371

for livecd users try

sudo update-hustoj

Disable Unused Language

edit /var/www/JudgeOnline/include/db_info.inc.php

$OJ_LANGMASK=1008; //for C/CPP/Pascal/Java only