Dave Ackley: Artificial Life

Dave Ackley

CentOS: iptables

Command:

# cat ./set_firewall

Result:

#!/bin/bash

# Flush all the chains in filter (default) table.
iptables -F

# Attempt to delete every non-builtin chain in filter (default) table.
iptables -X

# Set the policy for INPUT chain to DROP target.
iptables -P INPUT DROP

# Set the policy for FORWARD chain to DROP target.
iptables -P FORWARD DROP

# Set the policy for OUTPUT chain to ACCEPT target.
iptables -P OUTPUT ACCEPT

# Append rules to INPUT chain.
# Protocol of the rule is icmp (Internet Control Message Protocol) which is the protocol for ping.
# Target is ACCEPT.
iptables -A INPUT -p icmp -j ACCEPT

# Append rules to INPUT chain.
# The rule is for Loopback network interface.
# Target is ACCEPT.
iptables -A INPUT -i lo -j ACCEPT

# Append rules to INPUT chain.
# The rule is for tcp protocol on port 80.
# Target is ACCEPT
iptables -A INPUT -p tcp --dport 80 -j ACCEPT

# Append rules to INPUT chain.
# The rule is for tcp protocol on port 22.
# Target is ACCEPT
iptables -A INPUT -p tcp --dport 22 -j ACCEPT

# Append rules to INPUT chain.
# The rule for packets after session ESTABLISHED and RELATED packets.
# Target is ACCEPT
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# Dump iptables rules to stdout
iptables-save

Command:

# ./set_firewall

Result:

# Generated by iptables-save v1.4.21 on Tue May 24 23:44:34 2016
*nat
:PREROUTING ACCEPT [41489:3695453]
:INPUT ACCEPT [15:960]
:OUTPUT ACCEPT [628:160830]
:POSTROUTING ACCEPT [628:160830]
:OUTPUT_direct - [0:0]
:POSTROUTING_ZONES - [0:0]
:POSTROUTING_ZONES_SOURCE - [0:0]
:POSTROUTING_direct - [0:0]
:POST_public - [0:0]
:POST_public_allow - [0:0]
:POST_public_deny - [0:0]
:POST_public_log - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -j POSTROUTING_direct
-A POSTROUTING -j POSTROUTING_ZONES_SOURCE
-A POSTROUTING -j POSTROUTING_ZONES
-A POSTROUTING_ZONES -o enp0s3 -g POST_public
-A POSTROUTING_ZONES -g POST_public
-A POST_public -j POST_public_log
-A POST_public -j POST_public_deny
-A POST_public -j POST_public_allow
-A PREROUTING_ZONES -i enp0s3 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Tue May 24 23:44:34 2016
# Generated by iptables-save v1.4.21 on Tue May 24 23:44:34 2016
*mangle
:PREROUTING ACCEPT [58667:5285859]
:INPUT ACCEPT [58666:5285283]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [28814:3788418]
:POSTROUTING ACCEPT [28814:3788418]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
:POSTROUTING_direct - [0:0]
:PREROUTING_ZONES - [0:0]
:PREROUTING_ZONES_SOURCE - [0:0]
:PREROUTING_direct - [0:0]
:PRE_public - [0:0]
:PRE_public_allow - [0:0]
:PRE_public_deny - [0:0]
:PRE_public_log - [0:0]
-A PREROUTING -j PREROUTING_direct
-A PREROUTING -j PREROUTING_ZONES_SOURCE
-A PREROUTING -j PREROUTING_ZONES
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
-A POSTROUTING -j POSTROUTING_direct
-A PREROUTING_ZONES -i enp0s3 -g PRE_public
-A PREROUTING_ZONES -g PRE_public
-A PRE_public -j PRE_public_log
-A PRE_public -j PRE_public_deny
-A PRE_public -j PRE_public_allow
COMMIT
# Completed on Tue May 24 23:44:34 2016
# Generated by iptables-save v1.4.21 on Tue May 24 23:44:34 2016
*security
:INPUT ACCEPT [17193:1591366]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [28814:3788418]
:FORWARD_direct - [0:0]
:INPUT_direct - [0:0]
:OUTPUT_direct - [0:0]
-A INPUT -j INPUT_direct
-A FORWARD -j FORWARD_direct
-A OUTPUT -j OUTPUT_direct
COMMIT
# Completed on Tue May 24 23:44:34 2016
# Generated by iptables-save v1.4.21 on Tue May 24 23:44:34 2016
*raw
:PREROUTING ACCEPT [58667:5285859]
:OUTPUT ACCEPT [28814:3788418]
:OUTPUT_direct - [0:0]
:PREROUTING_direct - [0:0]
-A PREROUTING -j PREROUTING_direct
-A OUTPUT -j OUTPUT_direct
COMMIT
# Completed on Tue May 24 23:44:34 2016
# Generated by iptables-save v1.4.21 on Tue May 24 23:44:34 2016
*filter
:INPUT DROP [0:0]
:FORWARD DROP [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
COMMIT
# Completed on Tue May 24 23:44:34 2016


Command:

# iptables -L -v

Result:

Chain INPUT (policy DROP 4 packets, 128 bytes)
 pkts bytes target     prot opt in     out     source               destination      
    0     0 ACCEPT     icmp --  any    any     anywhere             anywhere          
    0     0 ACCEPT     all  --  lo     any     anywhere             anywhere          
    0     0 ACCEPT     tcp  --  any    any     anywhere             anywhere             tcp dpt:http
   57  3900 ACCEPT     tcp  --  any    any     anywhere             anywhere             tcp dpt:ssh
    0     0 ACCEPT     all  --  any    any     anywhere             anywhere             state RELATED,ESTABLISHED

Chain FORWARD (policy DROP 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination      

Chain OUTPUT (policy ACCEPT 29 packets, 7336 bytes)
 pkts bytes target     prot opt in     out     source               destination

Pixelmator: Brushes: Grunge

Pixelmator: Brushes: Abstract

James Clewett: 13,983,816 and the Lottery

• National Lottery
• Lottery mathematics

Sean Murray: No Man's Sky: 18 Minute Gameplay Demo

Sean Murray

No Man’s Sky: EXPLORE Trailer

John Hunton: 5 and Penrose Tiling

John Hunton

• We didn't see it because we didn't look for it.
• One of the ways in which, one of the most common ways in which patterns like this are found are by taking regular pattern, but in a much higher dimensional space, and then cutting through that space, at an irrational angle. And the irrationality of the way you've cut it will mean that you'll never get complete repetition.
• Dan Schlectman (ダニエル・シェヒトマン)
• Quasicrystal (準結晶)

Philip Moriarty: Sounds of Pi: Six Nines In Pi (ファインマン・ポイント)

Alan Mandel: Amazing Neck Pain Relief Self-Acupressure Point in Hand

Alan Mandell: Unexpected Link Between Forward Head Posture and Your Eyes (Self-Test Exercise)

Alan Mandell

Alan Mandell: Most Important Exercise to Help Pinched Nerve and Neck Pain

Alan Mandell

• Radiculopathy (神経根障害)
• Radicular pain (神経根痛)

Pokemon GO: BIGGEST CROWD EVER!!! (Santa Monica Pier)

• Holly Conrad

Ichiro Suzuki & Hideki Irabu: イチローVS伊良部のハイレベルな攻防

Hideki Irabu