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Setup Anonymous FTP

Anonymous FTP Should be considered a security concern and should be enabled only if it is absolutely necessary. Also, to allow FTP to work properly in a chroot environment, make sure that the file system containing the FTP home directory is not mounted as nosuid.

  1. Crear la esctructura de directorio FTP home directory: 
    mkdir /export/ftp/pub
    mkdir /export/ftp/bin
    mkdir /export/ftp/dev
    mkdir /export/ftp/etc
    mkdir /export/ftp/usr
    mkdir /export/ftp/usr/lib
  2. Copiar el binario de ls comand al  FTP bin directory: 
    cp /usr/bin/ls /export/ftp/bin
    chmod 111 /export/ftp/bin/ls
  3. Copiar librerias necesarias dentro del  FTP directory: 
    cp /usr/lib/ld.so* /export/ftp/usr/lib
    cp /usr/lib/libc.so.1 /usr/lib/libdl.so.1 /export/ftp/usr/lib
    cp /usr/lib/libintl.so.1 usr/lib/libw.so.1 /export/ftp/usr/lib
    cp /etc/passwd /etc/group /etc/netconfig /export/ftp/etc
  4. Copiar archivos necesarios dentro del FTP directory structure a resolver  NIS names: 
    cp /usr/lib/nss*.so.1 /export/ftp/usr/lib
    cp /usr/lib/libnsl.so.1 /export/ftp/usr/lib
    cp /usr/lib/straddr.so /export/ftp/usr/lib
    cp /etc/nsswitch.conf /export/ftp/etc
  5. Asignar permisos en  /export/ftp/usr/lib y /export/ftp/etc directories: 
    chmod 555 /export/ftp/usr/lib/*
    chmod 444 /export/ftp/etc/*
  6. Asignar permisos a los directorios creados: 
    chmod 555 /export/ftp/usr/lib
    chmod 555 /export/ftp/usr
    chmod 555 /export/ftp/bin
    chmod 555 /export/ftp/dev
    chmod 555 /export/ftp/etc
    chmod 755 /export/ftp/pub
    chmod 555 /export/ftp
  7. Agregar la siguiente linea en  /etc/passwd file: 
    ftp:x:30000:30000:Anonymous FTP:/export/ftp:/bin/false
  8. Agregar la siguiente linea en  /etc/shadow file: 
    ftp:NP:6445::::
  9. Asegurar permisos sean propiedad de root y no de FTP: 
    chown -R root /export/ftp
  10.  Enjoy

Regresar

Random TIPS

RESPALDAR ARCHIVO wtmpx CON FORMATO LEGIBLE 

root@ # cd /var/adm/
root@ # ls -l wtmpx
-rw-r--r--   1 adm      adm      1539641784 Apr 15 18:02 wtmpx
root@ # /usr/lib/acct/fwtmp < /var/adm/wtmpx > /var/adm/wtmpx.`date +%Y%m%d`
root@ # ls -l | grep wtmpx
-rw-r--r--   1 adm      adm      1539693492 Apr 15 18:09 wtmpx
-rw-r--r--   1 root     other    355949528 Apr 15 18:09 wtmpx.20150415
root@ # > /var/adm/wtmpx
root@ # ls -l /var/adm/wtmpx
-rw-r--r--   1 adm      adm          372 Apr 15 18:11 /var/adm/wtmpx
root@ # gzip wtmpx.20150415
root@ # ls -l | grep wtmpx
-rw-r--r--   1 adm      adm        10044 Apr 15 18:12 wtmpx
-rw-r--r--   1 root     other    42045437 Apr 15 18:09 wtmpx.20150415.gz
root@ #

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