Resume : Hyunho.Ji

Address

GangNam-gu, Seoul, Korea 135-220

605-612 Dosigebal APT, Suso-dong

Cell:82-10-4786-1985, Email: mnnclub@gmail.com

University of Yongin

Computer imformation

2001.03 ~ 2008.08

University of Sogang

Imformation systems & security

Master's course 2009.03 ~

Linux Master 1

IHD by Korea 2002.07

CCNA

CISCO 2007.01

Manage network & server by 6 yesars

Server

Kernel Rebuild

APM(compile by Apache, php+gd, mysql)

qmail + vpopmail + roundcube

DNS(djb-dns)

Rsync(backup)

Network

Network Design by cisco 3750 Switch

Monitering by nagios + mrtg

Security

Server

Patch for Netfilter-Iptables Script

Limit to Packet per second

Web Application Firewal

Network

Traffic Control by Bridge

L2 ~ L7 Packet Access Control

IDS by snort + QOS

Used by sed,awk,sort,grep,expect,bash(for,while,case,if...)

move.sh

move user other to server from original server(Data: FTP, DB, Mail)

Algorithm>

1. Analyze User imformation

2. Compress User data

3. Connect Remote other server

4. Make User(+db,mail)

5. Copying Data + Decompress

6. Connect DNS server + change IP

7. Move Original Data to temporary

ARP.sh

Monitering ARP table

Algorithm>

1. Connect CISCO Switch

2. show arp table

3. Parsing to duplicate MAC address

4. Confirm Admin Webpage

iptables - patch

Apply IP,MAC,String List by hosts.deny, hosts.allow

Algorithm>

1. Parsing hosts.allow(deny)

2. Apply iptables INPUT, OUTPUT

Example>

B class: 10.10.0.0/16

Multiclass: 10.10.2.0~10.10.5.128

String: <script, iframe ...

Mac: 00:E0:4C:C5:1A:38

OverLoad.sh

Check Process to use high resources

CPU, Memory

Algorithm>

1. Confirm Process List(ps,top)

2. Parsing + Check

3. If over limit?

4. Logging + Kill