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[Errno 14] curl#56 – “Network error recv()” – impostare proxy yum Fedora Core

Sunday, August 7th, 2011

Se dopo aver lanciato yum update:

[usertest@fedoratest ~]$ sudo yum update
[sudo] password for usertest:

Compare:

Loaded plugins: langpacks, presto, refresh-packagekit
fedora/metalink | 33 kB 00:00
http://fedora.mirror.garr.it/mirrors/fedora/linux/releases/15/Everything/i386/os/repodata/repomd.xml: [Errno 14] curl#56 - "Network error recv()"
Trying other mirror.
ftp://ftp.ciril.fr/pub/linux/fedora/linux/releases/15/Everything/i386/os/repodata/repomd.xml: [Errno 14] curl#7 - "Couldn't connect"
Trying other mirror.
http://mirror.nl.leaseweb.net/fedora/linux/releases/15/Everything/i386/os/repodata/repomd.xml: [Errno 14] curl#56 - "Network error recv()"
Trying other mirror.
[...]

Potrebbe essere necessario impostare il vostro proxy nel file yum.conf. Quindi andiamo ad editare tale file:

[usertest@fedoratest ~]$ sudo gedit /etc/yum.conf

e aggiungiamo le seguenti righe al suo interno, dopo il tag [main]:

proxy=http://proxy.mioDominio.it:portaDelProxy
proxy_username=nomeUtente
proxy_password=miaPassword

Es:
[main]
proxy=http://proxy.gabriele.it:8080
proxy_username=gabriele
proxy_password=My_V3rY_Str0Ng_P4$$wW0rD!
cachedir=/var/cache/yum/$basearch/$releasever
keepcache=0
debuglevel=2
...

N.B. 1: ricordatevi che il file yum.conf è aperto in lettura a tutti gli utenti… la password è scritta in chiaro…

N.B. 2: a quanto parte Fedora Core 15 ha un bug per l’impostazione del proxy. Leggi qui.

 

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Posted in Fedora Core, Net, Software, Unix-Linux | No Comments »

SIOCSIFNETMASK No such device

Thursday, January 20th, 2011

Mentre avviavo una Debian, ho visto dei messaggi che mi hanno insospettito:

SIOCSIFNETMASK: No such device
SIOCSGIFADDR: No such device
eth0: ERROR while getting interface flags: no such device
eth1: ERROR while getting interface flags: no such device

Facendo:

$ ifconfig

veniva visualizzata solo l’interfaccia loopback, mentre con:

$ ifconfig -a

non c’erano più la eth0 e la eth1, ma la eth2 e eth3 (Figura 1):

ifconfig -a

Figura 1: ifconfig -a

Andando a vedere il log: /var/log/messages ho notato:

kernel: [..] udev: renamed network interface eth0 to eth2
kernel: [..] udev: renamed network interface eth1 to eth3

Successivamente ho controllato il file:

/etc/udev/rules.d/70-persistent-net.rules

e ho visto le seguenti righe:

# PCI device 0x8086:0x1076 (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*c",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:0x1076 (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*d",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

# PCI device 0x8086:0x1076 (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*6",
ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth2"
# PCI device 0x8086:0x1076 (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*7",
ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth3"

A questo punto sono andato a controllare (sempre da ifconfig -a, vedi Figura 1) i MAC delle schede, ho commentato le prime due righe (con MAC diverso) e ho modificato le ultime due mettendo “eth0″ e “eth1″ al posto di “eth2″ e “eth3″ (Figura 2):

# PCI device 0x8086:0x1076 (e1000)
#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*c",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:0x1076 (e1000)
#SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*d",
ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"
# PCI device 0x8086:0x1076 (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*6",
ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
# PCI device 0x8086:0x1076 (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="*:*:*:*:*:*7",
ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1"

70-persistent-net.rules

Figura 2: 70-persistent-net.rules

Dopo aver fatto ciò, ho riavviato ed è tornato tutto come prima.

SIOCSIFNETMASK: No such device
SIOCSGIFADDR: No such device

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Posted in Debian, Net, Unix-Linux | No Comments »

Firewall Linux e BSD

Wednesday, October 13th, 2010

Distribuzioni dedicate per firewall (Linux e BSD based):

  • Neobewall (basato sul progetto M0n0wall)
  • ipcop distribuzione firewall Linux
  • Zeroshell “[...] Zeroshell is a small Linux distribution for servers and embedded devices aimed at providing the main network services a LAN requires[...]“
  • pfSense “[...] pfSense is a free, open source customized distribution of FreeBSD tailored for use as a firewall and router[...]“
  • SmoothWall “[...]a free firewall that includes its own security-hardened GNU/Linux operating system and an easy-to-use web interface[...]“
  • Devil-Linux “Devil-Linux is a distribution which boots and runs completely from CDROM [...]“
  • ClarkConnect “ClarkConnect is a powerful server/gateway software solution designed for the small/medium-sized organization. [...]“
  • redWall “redWall is a bootable CD-ROM Firewall. [...]“

Altre soluzioni (commerciali):

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File hosting websites

Saturday, October 24th, 2009

Siti che offrono servizi di file hosting:

Aggiunte e/o correzioni sono bene accette.

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Digital Forensics tools

Saturday, November 1st, 2008
  • Autopsy “[...] The Autopsy Forensic Browser is a graphical interface to the command line digital investigation tools in The Sleuth Kit [...]“
  • Sleuthkit “[...] is a library and collection of command line tools that allow you to investigate volume and file system data”
  • Foremost (for data carving)
  • sha256deep command (to compute file hash)
  • grep command (to search keywords)
  • awk command (to analyse the output)
  • sed command (to analyse the output)
  • dd command

Other Data Carving Tools

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