![]() ![]() Solar winds tftp server is an easy to use server for backing up/restoring your flash or running configuration files.Īfter that, using a terminal emulation softwarer like putty or Tera Term to telnet to your cisco router or switch. I would recommend solar winds tftp server which can be downloaded from here If you are in a cisco environment, and you have been having problems on how to go about backing up your cisco router or switch, here is a guide on how to do this.įirst download a tftp server. I know many network admins or those responsible for ensuring security of their networks by backing up their flash images or running configurations have always experienced challenges on how to go about. 5.As ICT professionals, we do understand that backing up our system configurations, databases, is one of the best way to ensure ease of restorations of operations when faced with a crisis. I am hopeful that the information shared makes both network administrators and security professionals aware of these misconfigures and provides a reference to further improve securing Cisco networks. Remote TFTP clients are used to transfer public files to and from an HP Nonstop Server host systems TFTP server (TFTPSRV). nmap -sU -p69 -script tftp-enum.nse įigure 20: Port Descriptions 4.0 ConclusionĪs I briefly demonstrated, obtaining a Cisco configuration file could provide an attacker the required information to establish a foothold and laterally move across a network. These applications are necessary for the routers to act as a client. Since TFTP does not provide a directory listing, the NSE script performs basic enumeration of common Cisco configuration file names. Transfer Protocol (FTP) and Trivial File Transfer protocol (TFTP) for a Cisco. 2.0 Configuration File Download 2.1 TFTPĪfter identifying a TFTP server during the reconnaissance phase, I will rescan the exposed TFTP server port utilizing Nmap with the tftp-enum.nse script. Start Tftpd software and browse to tftp client TAB. Not only do configuration files provide information regarding the device, but they also provide additional avenues for further enumeration and possible lateral movement, such as physical and logical neighbor relations, password reuse, user enumeration, and applied access control lists (ACL). Cant upload TFTP AP image file to cisco AP Posted by Michael8386 on Oct 17th, 2014 at 11:21 AM Cisco. Each one of these services provides an avenue to exploit a misconfiguration to download a Cisco configuration file.Ĭisco configuration files can provide a wealth of knowledge for an attacker. Today, I have taken that knowledge and used it to demonstrate how to compromise networks so that I can help clients strengthen their security posture.ĭuring the reconnaissance phase of a penetration test, I typically look for an exposed TFTP, SNMP, and Cisco Smart Install (SMI) service on a network. ![]() During that time, I performed best practice assessments aimed at identifying misconfigurations that could lead to a network compromise. Prior to making a career change to offensive security, I spent over 15 years working for a Cisco partner designing and implementing enterprise and VoIP networks. ![]() This document provides tips on how to select and use a TFTP server. By Michael Bond in Penetration Testing, Security Testing & Analysis 1.0 Intro There are many freeware Trivial File Transfer Protocol (TFTP) servers on the Internet which are able to perform maintenance activities on Cisco products, such as upgrades to Cisco IOS software on Cisco routers. ![]()
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