Linux Rsync Ssh Examples
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Towards Web-Based Delta Synchronization for Cloud Storage Services
Towards Web-based Delta Synchronization for Cloud Storage Services He Xiao Zhenhua Li ∗ Ennan Zhai Tianyin Xu Tsinghua University Tsinghua University Yale University UIUC Yang Li Yunhao Liu Quanlu Zhang Yao Liu Tsinghua University Tsinghua University Microsoft Research SUNY Binghamton Abstract savings in the presence of users’ file edits [29, 39, 40]. Delta synchronization (sync) is crucial for network-level Unfortunately, today delta sync is only available for efficiency of cloud storage services. Practical delta sync PC clients and mobile apps, but not for the web—the most pervasive and OS-independent access method [37]. techniques are, however, only available for PC clients 0 and mobile apps, but not web browsers—the most per- After a file f is edited into a new version f by users, vasive and OS-independent access method. To under- Dropbox’s PC client will apply delta sync to automati- stand the obstacles of web-based delta sync, we imple- cally upload only the altered bits to the cloud; in contrast, Dropbox’s web interface requires users to manually up- ment a delta sync solution, WebRsync, using state-of- 0 1 the-art web techniques based on rsync, the de facto delta load the entire content of f to the cloud. This gap sig- sync protocol for PC clients. Our measurements show nificantly affects web-based user experiences in terms of that WebRsync severely suffers from the inefficiency of both sync speed and traffic cost. JavaScript execution inside web browsers, thus leading Web is a fairly popular access method for cloud stor- to frequent stagnation and even hanging. -
Easy Slackware
1 Создание легкой системы на базе Slackware I - Введение Slackware пользуется заслуженной популярностью как классический linux дистрибутив, и поговорка "кто знает Red Hat тот знает только Red Hat, кто знает Slackware тот знает linux" несмотря на явный снобизм поклонников "бога Патре га" все же имеет под собой основания. Одним из преимуществ Slackware является возможность простого создания на ее основе практически любой системы, в том числе быстрой и легкой десктопной, о чем далее и пойдет речь. Есть дис трибутивы, клоны Slackware, созданные именно с этой целью, типа Аbsolute, но все же лучше создавать систему под себя, с максимальным учетом именно своих потребностей, и Slackware пожалуй как никакой другой дистрибутив подходит именно для этой цели. Легкость и быстрота системы определяется выбором WM (DM) , набором программ и оптимизацией программ и системы в целом. Первое исключает KDE, Gnome, даже новые версии XFCЕ, остается разве что LXDE, но набор программ в нем совершенно не устраивает. Оптимизация наиболее часто используемых про грамм и нескольких базовых системных пакетов осуществляется их сборкой из сорцов компилятором, оптимизированным именно под Ваш комп, причем каж дая программа конфигурируется исходя из Ваших потребностей к ее возможно стям. Оптимизация системы в целом осуществляется ее настройкой согласно спе цифическим требованиям к десктопу. Такой подход был выбран по банальной причине, возиться с gentoo нет ни какого желания, комп все таки создан для того чтобы им пользоваться, а не для компиляции программ, в тоже время у каждого есть минимальный набор из не большого количества наиболее часто используемых программ, на которые стоит потратить некоторое, не такое уж большое, время, чтобы довести их до ума. Кро ме того, такой подход позволяет иметь самые свежие версии наиболее часто ис пользуемых программ. -
Cheat Sheet – Common Ports (PDF)
COMMON PORTS packetlife.net TCP/UDP Port Numbers 7 Echo 554 RTSP 2745 Bagle.H 6891-6901 Windows Live 19 Chargen 546-547 DHCPv6 2967 Symantec AV 6970 Quicktime 20-21 FTP 560 rmonitor 3050 Interbase DB 7212 GhostSurf 22 SSH/SCP 563 NNTP over SSL 3074 XBOX Live 7648-7649 CU-SeeMe 23 Telnet 587 SMTP 3124 HTTP Proxy 8000 Internet Radio 25 SMTP 591 FileMaker 3127 MyDoom 8080 HTTP Proxy 42 WINS Replication 593 Microsoft DCOM 3128 HTTP Proxy 8086-8087 Kaspersky AV 43 WHOIS 631 Internet Printing 3222 GLBP 8118 Privoxy 49 TACACS 636 LDAP over SSL 3260 iSCSI Target 8200 VMware Server 53 DNS 639 MSDP (PIM) 3306 MySQL 8500 Adobe ColdFusion 67-68 DHCP/BOOTP 646 LDP (MPLS) 3389 Terminal Server 8767 TeamSpeak 69 TFTP 691 MS Exchange 3689 iTunes 8866 Bagle.B 70 Gopher 860 iSCSI 3690 Subversion 9100 HP JetDirect 79 Finger 873 rsync 3724 World of Warcraft 9101-9103 Bacula 80 HTTP 902 VMware Server 3784-3785 Ventrilo 9119 MXit 88 Kerberos 989-990 FTP over SSL 4333 mSQL 9800 WebDAV 102 MS Exchange 993 IMAP4 over SSL 4444 Blaster 9898 Dabber 110 POP3 995 POP3 over SSL 4664 Google Desktop 9988 Rbot/Spybot 113 Ident 1025 Microsoft RPC 4672 eMule 9999 Urchin 119 NNTP (Usenet) 1026-1029 Windows Messenger 4899 Radmin 10000 Webmin 123 NTP 1080 SOCKS Proxy 5000 UPnP 10000 BackupExec 135 Microsoft RPC 1080 MyDoom 5001 Slingbox 10113-10116 NetIQ 137-139 NetBIOS 1194 OpenVPN 5001 iperf 11371 OpenPGP 143 IMAP4 1214 Kazaa 5004-5005 RTP 12035-12036 Second Life 161-162 SNMP 1241 Nessus 5050 Yahoo! Messenger 12345 NetBus 177 XDMCP 1311 Dell OpenManage 5060 SIP 13720-13721 -
Gestión De Respaldos En Debian
Gestión de respaldos en Debian Los ordenadores en algún momento fallan o errores humanos causan daños al sistema y los datos. Las operaciones de copia de seguridad y recuperación son una parte esencial de la administración del sistema para que el mismo se recupere después de un fallo y siga funcionando correctamente. Para ello, existen tres puntos clave a tener en cuenta para determina la política del respaldo. 1. Saber qué debemos respaldar. 2. Saber cómo respaldar y recuperar en caso de fallo. 3. Evaluación de riesgos y costos involucrados. Debemos respaldar los siguientes archivos: Archivos de datos directamente creados por el usuario: datos en "~/". Archivos de datos creados por las aplicaciones utilizadas: datos en "/var/", exceptuando "/var/cache/", "/var/run/", y "/var/tmp/". Archivos de configuración del sistema: datos en “/etc/”. Softwares locales: datos en “/usr/local/” o “/opt/”. Información de instalación del sistema: un archivo de texto sin formato con los pasos claves (particiones, etc). Demostración del conjunto de datos: confirmado por las operaciones de recuperación experimentales realizadas con antelación. Al realizar el respaldo, debemos tener en cuenta los siguientes puntos: El almacenamiento seguro de datos: protección sobre los fallos de sistema y la sobreescritura. Realizar copias de seguridad frecuentes: de forma programada. La copia de seguridad debe ser redundante: duplicación de datos (data mirroring). El proceso debe ser fácil: en lo posible que requiera solo un comando para la copia de seguridad. Debemos realizar una evaluación del proceso a utilizar: Valor de los datos en caso de pérdidas. Los recursos necesarios para la copia de seguridad: usuario, hardware y software. -
List of NMAP Scripts Use with the Nmap –Script Option
List of NMAP Scripts Use with the nmap –script option Retrieves information from a listening acarsd daemon. Acarsd decodes ACARS (Aircraft Communication Addressing and Reporting System) data in real time. The information retrieved acarsd-info by this script includes the daemon version, API version, administrator e-mail address and listening frequency. Shows extra information about IPv6 addresses, such as address-info embedded MAC or IPv4 addresses when available. Performs password guessing against Apple Filing Protocol afp-brute (AFP). Attempts to get useful information about files from AFP afp-ls volumes. The output is intended to resemble the output of ls. Detects the Mac OS X AFP directory traversal vulnerability, afp-path-vuln CVE-2010-0533. Shows AFP server information. This information includes the server's hostname, IPv4 and IPv6 addresses, and hardware type afp-serverinfo (for example Macmini or MacBookPro). Shows AFP shares and ACLs. afp-showmount Retrieves the authentication scheme and realm of an AJP service ajp-auth (Apache JServ Protocol) that requires authentication. Performs brute force passwords auditing against the Apache JServ protocol. The Apache JServ Protocol is commonly used by ajp-brute web servers to communicate with back-end Java application server containers. Performs a HEAD or GET request against either the root directory or any optional directory of an Apache JServ Protocol ajp-headers server and returns the server response headers. Discovers which options are supported by the AJP (Apache JServ Protocol) server by sending an OPTIONS request and lists ajp-methods potentially risky methods. ajp-request Requests a URI over the Apache JServ Protocol and displays the result (or stores it in a file). -
17 Basic Networking Clients
Certification Basic Networking Clients UNIT 17 Basic Networking Clients 1 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. UNIT 16: Objectives ? Learn basic network commands ? Learn how to communicate securely with remote hosts ? Understand the use of rsync and wget 2 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. UNIT 17: Agenda ? ssh / scp / telnet ? lftp ? links ? mutt ? rsync / wget ? ping / traceroute / host 3 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. ssh: Secure Shell ? Public-key encryption technology replacement for various unsecure services ? Allows secure access to remote systems · $ ssh joe@barney -or- · $ ssh -l joe barney joe@barney's password: · $ ssh barney ls /tmp 4 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. scp: Secure copy ? Secure replacement for rcp ? Layered on top of ssh · $ scp source destination ? Remote files can be specified using: · user@host:/path/to/file · -r option enables recursion · -p preserves times and permissions · -C compresses datastream 5 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. telnet and the “r” services ? Insecure protocols ? telnet: Login names and passwords pass over the network in clear text ? “r” services (rsh, rlogin, rcp): generally insecure authentication mechanism ? telnet client can be used to connect to services running on arbitrary ports ? Example: testing your mail server: $ telnet localhost 25 6 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. lftp ? Versatile command-line FTP client ? Anonymous or real-user sessions $ lftp ftp.cdrom.com $ lftp -u joe ftp.myserver.com ? Automated transfers with lftpget 7 Rev RH033-RHEL3-1 Copyright © 2003 Red Hat, Inc. -
The Nmap Project
Insecure.Org The Nmap Project Fotis Hantzis aka ithilgore sock-raw.org FOSSCOMM 2016 Insecure.Org whoami • Exploiting TCP and the Persist Timer Infiniteness (Phrack #66) • Abusing Network Protocols (stealthy portscanning through XMPP exploitation) • Nmap developer, Ncrack author • Startup ventures @ithilgore Insecure.Org http://phrack.org/issues/51/11.html#article Insecure.Org Ndiff NSE Npcap Zenmap Insecure.Org Trinity uses Nmap in Matrix Reloaded Insecure.Org CIA using Zenmap in Bourne Ultimatum Insecure.Org Die Hard 4 Insecure.Org And many more: http://nmap.org/movies Elysium Insecure.Org > 1000 students $5.000 stipends 3 – 4 months ~ 150 open source organizations Insecure.Org Past Nmap GSoC Accomplishments o Nping – generic packet crafting tool o Ncat – the modern netcat o Npcap – packet sniffing library (WPF) o Ncrack – network auth cracking tool o NSE – Nmap Scripting Engine o Zenmap – GUI for Nmap o Ndiff – diff for network scans Insecure.Org http://nmap.org/ncrack High speed network authentication cracking tool Insecure.Org Ncrack’s Main Features o Intelligent Core Engine o Service Recognition through Nmap (-oN, -oX) o Fine-grained timing control (cl, CL, to, cd, at, T1-T5) o Built-in username/password lists o Session stop/resume o Modular architecture o Nsock based (asynchronous) Insecure.Org Ncrack modules o SSH – custom opensshlib based on OpenSSH o RDP – extremely hard protocol by MS SMB o • Telnet o SIP • FTP • HTTP (basic/digest) • PostgreSQL • MySQL Contributions • VNC • POP3 • Redis Insecure.Org New Ncrack 0.5 release -
Pragma Systems & Stay-Linked™: Remote SSH Connectivity Done Right
WHITE PAPER Pragma Systems & Stay‐Linked™: Remote SSH Connectivity Done Right This paper is designed to serve as a primer for upgrading – or choosing and implementing – a highly effective, secure SSH connectivity solution. This document provides an overview of key regulatory and market developments driving the need to make remote computing systems more secure; takes a look at the origins of SSH and the factors that have led to its becoming the enterprise security protocol of choice; outlines key components of an optimal SSH‐based security approach; and, then, examines the market’s most trusted, effective, end‐to‐end, server and client SSH security solution, offered in partnership by Pragma Systems and Stay‐Linked. Pragma Systems & Stay‐Linked™: Remote SSH Connectivity Done Right Contents Executive Summary ............................................................................................................................................. 3 Takin’ it to the streets ......................................................................................................................................... 3 Clearly, it’s time to leave clear text behind ........................................................................................................ 4 Regulatory rundown ........................................................................................................................................... 4 Gaga for gadgets ................................................................................................................................................ -
Rsync Considered Inefficient and Harmful
rsync considered inefficient and harmful [email protected] [email protected] 1 RPKI uses rsync • RPKI uses rsync as its data publicaon protocol for wider public access. • The use is very constrained: – it’s a source, not a sink – It’s got specific objects in the tree (hopefully) • The use has been somewhat controversial – Not an IETF standard – Issues around efficiency/efficacy/scaling – Proposals to use HTTP, delta protocols • Tes>ng by NIST/BBN/RIPE on its behaviour 2 rsync: the protocol 3 rsync: the protocol • Andrew Tridgell design (with Paul Mackerass) – PhD thesis 1999, protocol 1996 • Designed to be highly efficient in using the net – Block checksums, only block differences sent – FleXible (a gazillion op>ons) – Send and Receive func>on de-coupled from client & server role • Massive organic feature growth in a single implementaon • Now on v31 of the protocol. – Such changes. Many op>ons. 4 rsync: the protocol 1. Connect. This iden>fies a client and a server – The client & server can be the sender or receiver and vice versa. These are completely decoupled from ‘who calls’ 2. Client passes capabili>es list, arguments – Iden>fies who takes the Sender/Receiver role 3. If Receiver, client sends a set of filter expressions at this point. 4. Receiver sends a list of checksums of blocks in files it thinks may be changed (if has none, sends null) 5. Sender sends a delta of new bytes plus eXis>ng blocks to the client to reconstruct the file 5 rsync: the protocol • The outcome is highly efficient on the wire • The checksum blocks eXchanged for the delta algorithm are a modified CRC32, that works on a sliding window. -
Algorithms for Low-Latency Remote File Synchronization
Algorithms for Low-Latency Remote File Synchronization Ý Hao Yan£ Utku Irmak Torsten Suel CIS Department Yahoo! Inc., CIS Department Polytechnic University 2821 Mission College Blvd, Polytechnic University Brooklyn, NY 11201 Santa Clara, CA 95054 Brooklyn, NY 11201 [email protected] [email protected] [email protected] Abstract tions of data within their distributed architectures. In all ofthese The remote file synchronization problem is how to update an applications, there are usually significant similarities between outdated version of a file located on one machine to the current successive versions of the files, and we would like to exploit version located on another machine with a minimal amount of these in order to decrease the amount of data that is transmit- network communication. It arises in many scenarios including ted. If the new files differ only very slightly from their previous web site mirroring, file system backup and replication, or web versions, then the cost should be very low, while for more sig- access over slow links. A widely used open-source tool called nificant changes, more data may have to be transmitted. rsync uses a single round of messages to solve this problem Remote file synchronization has been studied extensively (plus an initial round for exchanging meta information). While over the last ten years, and existing approaches can be divided research has shown that significant additional savings in band- into single-round and multi-round protocols. Single-round pro- width are possible by using multiple rounds, such approaches tocols [32, 12] are preferable in scenarios involving small files are often not desirable due to network latencies, increased pro- and large network latencies (e.g., web access over slow links). -
MX-19.2 Users Manual
MX-19.2 Users Manual v. 20200801 manual AT mxlinux DOT org Ctrl-F = Search this Manual Ctrl+Home = Return to top Table of Contents 1 Introduction...................................................................................................................................4 1.1 About MX Linux................................................................................................................4 1.2 About this Manual..............................................................................................................4 1.3 System requirements..........................................................................................................5 1.4 Support and EOL................................................................................................................6 1.5 Bugs, issues and requests...................................................................................................6 1.6 Migration............................................................................................................................7 1.7 Our positions......................................................................................................................8 1.8 Notes for Translators.............................................................................................................8 2 Installation...................................................................................................................................10 2.1 Introduction......................................................................................................................10 -
Network File Sharing Protocols
Network File Sharing Protocols Lucius quests her hotchpotch ethnologically, she contradistinguish it self-righteously. Dialogic Millicent catch prayingly. Sheridan usually foils stintedly or pirouette anaerobiotically when trilobed Saxon disposes genotypically and homeward. It is recommended that this type be accepted by all FTP implementations. So how do you protect yourself from these malware infected movies? Which protocol is even an option for you is based on your use scenario. Learn about the latest issues in cybersecurity and how they affect you. As more clients access the file, share important files digitally and work as a team even sitting miles apart. Friendly name of the printer object. SMB is built in to every version of Windows. As you can see NFS offers a better performance and is unbeatable if the files are medium sized or small. Processes utilizing the network that do not normally have network communication or have never been seen before are suspicious. You are correct, thank you. It syncs files between devices on a local network or between remote devices over the internet. Sets the maximum number of channels for all subsequent sessions. Session control packets Establishes and discontinues a connection to shared server resources. Please fill in all required fields before continuing. File names in CIFS are encoded using unicode characters. The configured natural language of the printer. After entering its resources or network protocols that protocol over the server supports file services while originally connected you must be set. Download a free fully functional evaluation of JSCAPE MFT Server. The File Transfer Protocol follows the specifications of the Telnet protocol for all communications over the control connection.