YKG

About

• I faced bandwidth issues between a WG Peer and a WG server. Download bandwidth when downloading from WG Server to WG peer was reduced significantly and upload bandwidth was practically non existent.
• I found a few reddit posts that said that we need to choose the right MTU. So I wrote a script to find an optimal MTU.
• Ideally I would have liked to have run all possible MTU configurations for both WG Server and WG Peer but for simplicity I choose to fix the WG Server to the original 1420 MTU and tried all MTUs from 1280 to 1500 for the WG Peer.

Testing

• On WG server, I started an iperf3 server
• On WG peer, I wrote a script that does the following:
  • wg-quick down wg0
• Edit MTU in the /etc/wireguard/wg0.conf file

YKG

# All options are required unless noted as "Optional" or under a # Begin and # End block, which is also noted as "Optional" or "Hardware Specific"
# It is important that they are selected as built-in or the kernel might fail to correctly detect the partitions and/or filesystems.
# It is a good idea to run "make defconfig" first

Device Drivers  --->
   Generic Driver Options  --->
      ()  path to uevent helper
      [*] Maintain a devtmpfs filesystem to mount at /dev
      [*] Automount devtmpfs at /dev, after the kernel mounted the rootfs

YKG

  Nr. + product name + .exe/.iso/dvd + file integrety check 
  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  
  1 MS-DOS 6.0 (English) EN_MSDOS60.exe 2000-10-12 877B0B8E391ED07CB83214CB09E8F3B10C4B206F

  2 SQL Server 2008 Enterprise (x86, x64, ia64) - DVD (Chinese-Simplified) zh-hans_sql_server_2008_enterprise_x86_x64_ia64_dvd_x14-89199.iso 2008-8-13 D23B103331AB0B3CCC82769B99CA1C2F16BEBBF4

  3 Windows XP Professional with Service Pack 2- VL (Simplified Chinese) sc_win_xp_pro_with_sp2_vl.iso 2005-5-18 C0ADDD927B5D1F93DCE9C455FD6B26EAC7391BE9

  4 MS-DOS 6.22 (English) EN_MSDOS622.exe 2000-10-12 D01AA47A5D85908185F8987E972AFC66DC92A735

YKG

现代密码学实践指南[2015年]

标签（空格分隔）： 密码学

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本文介绍目前现代密码学的最先进技术， 前半部分主要翻译自 《Cryptographic Right Answers》，附上收集的资料，和byron个人的理解。

YKG

 for i in *.bak; do mv $i ${i%.bak}; done;

YKG

# Migrate SMS from iPhone to Android in OSX #
Parts of this taken from http://pastebin.com/d4hNUmTK

1. Make an unencrypted backup of your iPhone to iTunes, not using iCloud.
2. cd /tmp
3. put iphone_sms_* here (found below)
4. Find your ~/Library/Application Support/MobileSync/Backup/*/3d0d7e5fb2ce288813306e4d4636395e047a3d28(.mddata)
5. 
    > sqlite3 ~/Library/Application Support/MobileSync/Backup/(id)/3d0d7e5fb2ce288813306e4d4636395e047a3d28(.mddata)

YKG

-- more info http://aaron-hoffman.blogspot.com/2017/02/iphone-text-message-sqlite-sql-query.html
select
 m.rowid
,coalesce(m.cache_roomnames, h.id) ThreadId
,m.is_from_me IsFromMe
,case when m.is_from_me = 1 then m.account
 else h.id end as FromPhoneNumber
,case when m.is_from_me = 0 then m.account
 else coalesce(h2.id, h.id) end as ToPhoneNumber
,m.service Service

YKG

修改了源文件，没有看到 JRebel 加载新的 class，原因是 IntelliJ 中的 `Registry` 没有启用 `compiler.automake.allow.when.app.running`

YKG

# proxy list
alias proxy='export all_proxy=socks5://127.0.0.1:1087'
alias unproxy='unset all_proxy'

YKG

sudo nmap -P0 -p 20177 --traceroute <IP/DomainName>