Friday, June 19, 2009

GFW 开始识别 WEB 代理

之前提到用 HTTP 中转的办法解决了评论的问题,今天发现 Blog 上所有的评论又失效了…… 开始以为是因为页面直接引用了 www.blogger.com 域名的某些内容而导致撞墙,但仔细分析后发现,我的 HTTP 中转直接不能访问了,而且之后我的 HTTP 中转程序所在的域名也会在一小段时间内无法访问…… 但同时,用该中转能够访问原本没有被封的内容,比如 Flickr……

考虑到传入的目标 URL 参数是用 Base64 和 URL Encode 方式处理的,不存在任何加密,而且这和大多数的 WEB 代理相同,所以推测是现在 GFW 能够识别用 Base64 编码的内容,如果该内容刚好是被屏蔽的网址,则阻拦该 HTTP 请求,并且屏蔽该请求所在的域…… 从而让公众无法通过 WEB 代理访问屏蔽内容。

当然,解决的办法也简单,如果不能简单通过 Base64 decode 得到一个 URL,那么它也就无从判断是不是被屏蔽的网址了……

我起先想直接把原网址按位取反再 Base64 就行了,结果同事说我作为一个 IT 人士这么干太低级了…… 他们说用 RSA 吧,但是也犯不着这么兴师动众吧……

还是 Liuming 小弟比较聪明,提供了一个比按位取反高级,又比 RSA 简单的办法,那就是……

两次 Base64…… >.<"e;

27 comments:

Gregory said...

测试留言~

Maple said...

万恶的GFW

Anonymous said...

和我的想法一样,两次base64

kmxz said...

两次 Base64…… 真强大

Coach Factory said...

coach factory, oakley sunglasses, polo ralph lauren outlet, kate spade outlet, michael kors, ray ban sunglasses, michael kors outlet, louboutin, ray ban, longchamp, louis vuitton handbags, air jordan, louboutin, prada handbags, gucci outlet, oakley sunglasses, prada outlet, coach outlet store, nike shoes, louis vuitton, polo ralph lauren, air max, michael kors outlet, louboutin, michael kors outlet, toms shoes, tory burch outlet, burberry outlet online, tiffany and co, air max, jordan shoes, nike air max, coach outlet, true religion jeans, oakley sunglasses, ray ban sunglasses, burberry outlet online, nike free, michael kors, true religion outlet, louis vuitton outlet online, true religion, chanel handbags, polo ralph lauren outlet, coach purses, nike air max, nike free, ralph lauren, longchamp outlet

Coach Factory said...

oakley outlet, moncler outlet, oakley vault, rayban, ray-ban, canada goose outlet, oakley vault, oakley sunglasses cheap, cheap sunglasses, cheap oakley, ugg boots, ugg, ray ban, ralph lauren, oakley vault, ray ban outlet, raybans, ray ban, cheap sunglasses, ray ban sunglasses outlet, louboutin, oakley, cheap sunglasses, canada goose, canada goose, canada goose, cheap oakley sunglasses, cheap oakley sunglasses, ray bans, oakley sunglasses outlet, oakley sunglasses cheap, oakley sunglasses outlet, discount oakley sunglasses, ray ban, ray bans, rayban, cheap oakley sunglasses, tn pas cher, ray ban outlet, oakley outlet, oakley outlet, moncler, oakley sunglasses outlet, canada goose, gucci, moncler, moncler, canada goose outlet, oakley sunglasses cheap

Coach Factory said...

ferragamo shoes, supra shoes, abercrombie and fitch, ray ban pas cher, wedding dresses, nfl jerseys, reebok outlet, hermes, juicy couture outlet, air max, lululemon, p90x, ghd, timberland, mulberry, lancel, hogan, new balance shoes, birkin bag, mont blanc, asics, nike air max, ugg boots, soccer jerseys, hollister, rolex watches, north face outlet, beats by dre, montre pas cher, nike free, louis vuitton, ugg boots, herve leger, chi flat iron, vans, ralph lauren, oakley pas cher, jimmy choo, insanity, converse shoes, louis vuitton, karen millen, celine handbags, bottega veneta, marc jacobs, soccer shoes, mcm handbags, yoga pants, burberry, valentino shoes

jim kill said...

louis vuitton handbags
burberry scarf
ray ban sunglasses outlet
michael kors
cheap uggs
cheap oakleys
abercrombie fitch
ugg boots
tory burch flats
lv outlet
tods outlet
michael kors handbags
michael kors outlet online
ghd flat iron
coach outlet
coach factory online
prada handbags
lebron 11
canada goose jacket
ray ban outlet
christian louboutin
chanel handbags
coach outlet
polo outlet
michael kors outlet online
ray ban canada
coach factory outlet
20150311huangqihang

mao yun said...

2
hollister pas cher
michael kors canada
oakley vault
beats by dre,dr dre,beats headphones
kate spade outlet
fred perry shirts
oakley sunglasses
oakley sunglasses
links of london jewellery
michael kors handbags
jordan shoes
gucci handbags
puma shoes
ed hardy jeans
coach outlet online
burberry handbags
beats headphones
ray ban sunglasses
kate spade handbags
rolex watches
burberry handbags
karen millen uk
abercrombie outlet
ray ban
prada outlet
coach outlet
nfl jerseys
toms outlet
hollister clothing
asics gel kayano
pandora
toms outlet
coach outlet online
ghd hair
insanity max 30
mcm backpack
coach factory outlet
ray ban sunglasses
polo lacoste pas cher
air max 95
true religion jeans
20150330maoqiuyun

Guo Guo said...

air max 90
bottega veneta outlet
nike air max uk
nike huarache
custom mlb jerseys
surpa sneakers
coach outlet
seattle seahawks jerseys
the north face uk
kansas city chiefs jerseys
nike outlet store
atlanta falcons jersey
chanel handbags
green bay packers jerseys
michael kors uk
los angeles clippers jerseys
burberry outlet
dallas cowboys jersey
nike running shoes
arizona cardinals jerseys
oakley sunglasses canada
the north face outlet
oakley sunglasses
real madrid jersey
cleveland cavaliers jersey
pittsburgh steelers jersey
north face jackets
soccer shoes
mizuno running
san francisco 49ers jerseys
dansko outlet
new orleans saints jerseys
new york jets jerseys
air jordan shoes
los angeles lakers jerseys
north face outlet
mulberry uk
hermes belt
stuart weitzman boots
washington redskins jerseys
wei20150610

Xiaozhengmm 123 said...

2015-7-28 xiaozhengm
longchamp soldes
coach outlet online
abercrombie outlet
michael kors
cheap oakleys
rolex watches
true religion sale
cheap ray ban sunglasses
cheap jordans for sale
ed hardy
kate spade outlet
cheap oakley sunglasses
polo ralph lauren
gucci uk
gucci outlet
longchamp pas cher
longchamp handbags
air force 1
louis vuitton pas cher
ed hardy clothing
jordan pas cher
gucci outlet online
borse gucci
ray ban sunglass
mcm outlet
coach outlet online
ray ban sunglasses
nike tn pas cher
michael kors uk
oakley store
jordan uk
chanel online shop
prada outlet
ed hardy clothing
true religion jeans
cheap beats headphones
ralph lauren outlet
kate spade handbags
toms shoes outlet
soccer shoes

oakleyses said...

oakley sunglasses, longchamp outlet, ugg boots, chanel handbags, nike air max, longchamp, christian louboutin outlet, michael kors outlet, oakley sunglasses, tiffany and co, replica watches, tory burch outlet, nike air max, ray ban sunglasses, michael kors outlet, louboutin shoes, jordan shoes, louis vuitton outlet, louis vuitton, ray ban sunglasses, longchamp outlet, polo ralph lauren outlet, replica watches, kate spade outlet, oakley sunglasses, polo ralph lauren outlet, cheap oakley sunglasses, ugg boots, nike free, tiffany jewelry, michael kors outlet, uggs on sale, louis vuitton outlet, michael kors, oakley sunglasses, louboutin, louis vuitton, michael kors outlet, ray ban sunglasses, prada handbags, louis vuitton, burberry, burberry outlet online, gucci outlet

oakleyses said...

nike blazer, michael kors, nike free run uk, nike air max, true religion jeans, true religion jeans, air jordan pas cher, nike air max, ralph lauren uk, timberland, air max, nike roshe, tn pas cher, louboutin pas cher, true religion outlet, vans pas cher, coach outlet, hermes, ralph lauren pas cher, nike free, coach purses, michael kors, oakley pas cher, mulberry, hollister pas cher, lacoste pas cher, new balance pas cher, ray ban pas cher, vanessa bruno, burberry, hollister, michael kors, kate spade handbags, coach outlet, abercrombie and fitch, lululemon, coach factory outlet, nike roshe run, north face, nike air max, ray ban uk, michael kors, true religion jeans, converse pas cher, north face, air force, hogan, sac longchamp, longchamp pas cher, sac guess

oakleyses said...

ferragamo shoes, iphone 6s plus cases, babyliss, longchamp, reebok shoes, nike trainers, asics running shoes, oakley, iphone 5s cases, celine handbags, hollister, nfl jerseys, jimmy choo shoes, birkin bag, iphone 6s cases, iphone cases, mcm handbags, bottega veneta, giuseppe zanotti, iphone 6 plus cases, abercrombie and fitch, p90x workout, beats by dre, herve leger, north face outlet, instyler, louboutin, soccer jerseys, lululemon, nike roshe, s5 cases, timberland boots, mac cosmetics, soccer shoes, valentino shoes, insanity workout, vans shoes, hollister, ralph lauren, wedding dresses, ipad cases, chi flat iron, north face outlet, iphone 6 cases, nike air max, ghd, mont blanc, baseball bats, new balance, nike huarache

oakleyses said...

ugg pas cher, vans, moncler, moncler, canada goose, louis vuitton, ugg boots uk, canada goose, toms shoes, doudoune canada goose, moncler, louis vuitton, louis vuitton, ugg australia, juicy couture outlet, moncler, supra shoes, doke gabbana outlet, gucci, karen millen, moncler outlet, hollister, moncler, hollister, canada goose, louis vuitton, ray ban, marc jacobs, pandora jewelry, michael kors outlet online, moncler, swarovski crystal, pandora jewelry, wedding dresses, thomas sabo, moncler, bottes ugg, sac louis vuitton pas cher, nike air max, barbour, barbour jackets, pandora charms, canada goose outlet, canada goose uk, michael kors outlet, converse outlet, links of london, canada goose outlet, pandora charms, canada goose

mmjiaxin said...

marc jacobs
nike foamposite
vans shoes
calvin klein outlet
ralph lauren outlet
michael kors outlet online
swarovski crystal
ferragamo outlet
cheap nike shoes
michael kors handbags sale
oakley,occhiali oakley,oakley italia,oakley occhiali,oakley sunglasses
moncler outlet store
the north face outlet
michael kors factory online
ralph lauren uk
nike air max
asics,asics israel,asics shoes,asics running shoes,asics israel,asics gel,asics running,asics gel nimbus,asics gel kayano
longchamp outlet
michael kors wallet sale
michael kors outlet
mm1205

方松腾 said...

michael kors handbags,michael kors outlet,michael kors,kors outlet,michael kors outlet online,michael kors outlet online sale,michael kors handbags clearance,michael kors purses,michaelkors.com,michael kors bags,michael kors shoes,michaelkors,cheap michael kors
mlb jerseys wholesale
cheap mlb jerseys
cheap nfl jerseys
nfl jerseys wholesale
nike shoes
cheap oakley sunglasses
snapback hats
soccer jerseys,cheap soccer jerseys,cheap soccer jerseys for sale,soccer jersey,usa soccer jersey,football jerseys
cheap uggs
cheap ugg boots
ugg boots
uggs outlet
wedding dresses
chicago blackhawks

chenlili said...

chenlili20160629
retro 11
timberland outlet
louis vuitton handbags
longchamp handbags
cheap jordans
nike huarache
nike roshe run
louis vuitton outlet
coach factory outlet online
christian louboutin shoes
fitflop sandals
coach factory outlet
louis vuitton purses
nike outlet
ralph lauren outlet
polo ralph lauren
burberry bags
coach factory outlet online
nfl jerseys wholesale
louis vuitton outlet online
celine bags
true religion sale
louis vuitton purses
ralph lauren polo
true religion outlet
kobe 9
tory burch boots
coach factory outlet
adidas superstar
adidas nmd
nike free run 2
louis vuitton outlet
nike outlet store
air jordan 8
adidas running shoes
michael kors outlet clearance
copy watches
tory burch outlet online
coach outlet store online clearances

chenlili said...

chenlili20160629
air force 1
louboutin shoes
oakley vault
michael kors handbags
retro 11
ray ban sunglasses outlet
michael kors outlet
polo ralph lauren
coach outlet store online
adidas originals
tory burch handbags
coach outlet
louis vuitton purses
michael kors handbags
ray ban sunglasses outlet
coach outlet store online
rolex watches
designer handbags
louis vuitton bags
nike sb dunks
louis vuitton outlet stores
rolex watches
louis vuitton outlet
giuseppe zanotti outlet
ray ban sunglasses
nike blazers uk
ray ban sunglasses
coach outlet
nike store
ray ban sunglasses outlet
coach outlet
ghd hair straighteners
jordan retro 4
louis vuitton purses
coach outlet store online clearances
asics outlet
polo ralph lauren
nike sb janoski
jordan 3 white cenment

Gege Dai said...

jianbin0701
michael kors outlet
mcm outlet
michael kors outlet online
hermes outlet
nike air max
reebok shoes
michael kors outlet
replica watches
rolex watches
fitflops sale clearance
coach outlet online
coach outlet online
ferragamo outlet
camisetas futbol baratas
nike uk store
mulberry bags
louis vuitton neverfull sale
oakley sunglasses
mulberry handbags sale
michael kors uk outlet
tory burch outlet
louis vuitton outlet online
michael kors outlet
cheap mlb jerseys
soccer jerseys wholesale
michael kors uk
coach handbags outlet
louboutin pas cher
adidas uk store
toms outlet
lacoste shirts
oakley sunglasses uk
tory burch outlet
chrome hearts outlet

dong dong23 said...

adidas yeezy
nhl jerseys
tods shoes
oakley sunglasses
gucci outlet
cheap ray ban sunglasses
canada goose sale
louis vuitton outlet
kate spade
coach outlet
201610.19wengdongdong

mmjiaxin said...

longchamp handbags
michael jordan shoes
jordan retro
nfl jerseys
nfl jerseys from china
mlb jerseys wholesale
timberland outlet
longchamp bags
kobe shoes
http://www.michaeljordanshoes.us.com
gg

琐事 said...

michael kors handbags wholesale
cheap nfl jerseys wholesale
instyler max 2
nike huarache trainers
ed hardy outlet
pandora charms
michael kors handbags sale
tiffany and co outlet
lebron shoes
longchamp le pliage

chenmeinv0 said...

cheap nhl jerseys
canada goose sale
coach outlet store online clearances
canada goose jackets
coach factory outlet
abercrombie kids
ugg clearance
polo ralph lauren
canada goose jackets
michael kors outlet online
2016.11.14xukaimin

Hua Cai said...

ray bans
burberry outlet store
toms outlet
burberry outlet store
ray ban sunglasses
cartier watches
mlb jerseys
ugg boots
nike roshe run
louis vuitton outlet stores
20170207caihuali

dong dong23 said...

hollister kids
toms shoes for women
toms shoes outlet
louis vuitton outlet
oakley vault
adidas nmd
uggs outlet
pandora rings
calvin klein outlet
air jordan
2017.2.11chenlixiang

shengda xu said...

san francisco giants jerseys
rayban
ultra boost
michael kors
michael kors outlet
air max 95
michael kors outlet
sac longchamp pliage
clarks shoes
coach outlet store
xushengda0609