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alegioit
Tux's lil' helper
Tux's lil' helper


Joined: 13 Jul 2007
Posts: 78

PostPosted: Wed Jan 06, 2010 1:39 pm    Post subject: connessione wireless ad-hoc non funzionante... Reply with quote

ciao a tutti di nuovo :wink: .
Come qualcuno già saprà sto reinstallando gentoo sul mio serverino domestico... ho un problema con le icone ma posso non farci caso. Vorrei però far fungere il serverino anche da router.
Dopo aver provato varie schede wireless (di cui per nessuna vi è il supporto in linux per il modo master o ad-hoc) ho trovato una "RaLink RT2561/RT61 rev B 802.11g" che sembra funzionare bene anche in ad-hoc mode.
Il problema è che sembra tutto funzionare ( i due client si vedono e si agganciano ), ma non si scambiano pacchetti!
Non sto utilizzando il dhcp per comodità, quindi gli sto assegnando un indirizzo fisso... spero di star facendo casini!
L'interfaccia è un ed è funzionante, almeno credo!
Sto utilizzando la crttografia wep, ho provato anche a toglierla, ma il problema persiste!
Naturalmente ho iptables attivo, ma dovrei averso settato giusto e disattivandolo continuano a non pingarsi i computer.

less /etc/conf.d/net
Code:

#rete lan
config_eth1="dhcp"
modules_eth1="dhclient"
config_eth0="192.168.0.1/24 broadcast 192.168.0.255"
#rete wifi
config_wlan0="192.168.100.1 netmask 255.255.255.252 broadcast 192.168.100.3"
mode_wlan0="ad-hoc"
essid_wlan0="xxxxxxxxxx"
channel_wlan0="2"
key_irkwik="xxxxxxxxxxxxxxxxxx"


L'altro pc (su cui gira xp) ha indirizzo 192.168.0.2 netmask 255.255.255.252 bc 192.168.0.3

dmesg
Code:

#############DA QUI HO ATTIVATO L'INTARFACCIA###############
[92851.926028] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 0 - CWmin: 2, CWmax: 3, Aifs: 2, TXop: 47.
[92851.926039] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 1 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 94.
[92851.926048] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 2 - CWmin: 4, CWmax: 10, Aifs: 3, TXop: 0.
[92851.926058] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 3 - CWmin: 4, CWmax: 10, Aifs: 7, TXop: 0.
[92852.049059] phy0: device no longer idle - in use
[92852.049079] wlan0: sta_find_ibss (active_ibss=0)
[92852.049083]    sta_find_ibss: selected 1e:38:90:96:22:56 current 00:00:00:00:00:00
[92852.049085] wlan0: Selected IBSS BSSID 1e:38:90:96:22:56 based on configured SSID
[92852.053167] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 0 - CWmin: 2, CWmax: 3, Aifs: 2, TXop: 47.
[92852.053174] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 1 - CWmin: 3, CWmax: 4, Aifs: 2, TXop: 94.
[92852.053181] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 2 - CWmin: 4, CWmax: 10, Aifs: 3, TXop: 0.
[92852.053187] phy0 -> rt2x00mac_conf_tx: Info - Configured TX queue 3 - CWmin: 4, CWmax: 10, Aifs: 7, TXop: 0.
[92862.313011] wlan0: no IPv6 routers present
[92955.332678] UDP: short packet: From 0.136.255.255:8960 13568/115 to 160.60.200.1:31488


iwlist scanning
Code:

Cell 01 - Address: 1E:38:90:96:22:56
                    Channel:2
                    Frequency:2.417 GHz (Channel 2)
                    Quality=70/70  Signal level=0 dBm
                    Encryption key:on
                    ESSID:"xxxxxxxxxxxxx"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
                              9 Mb/s; 12 Mb/s; 18 Mb/s
                    Bit Rates:24 Mb/s; 36 Mb/s; 48 Mb/s; 54 Mb/s
                    Mode:Ad-Hoc
                    Extra:tsf=000000000b4e322d
                    Extra: Last beacon: 573782ms ago
                    IE: Unknown: 000669726B77696B
                    IE: Unknown: 010802040B160C121824
                    IE: Unknown: 030102
                    IE: Unknown: 06020000
                    IE: Unknown: 32043048606C


iwconfig wlan0
Code:

wlan0     IEEE 802.11bg  ESSID:"xxxxxxxxxxxxxxx"
          Mode:Ad-Hoc  Frequency:2.417 GHz  Cell: 1E:38:90:96:22:56
          Tx-Power=19 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
          Power Management:on


ifconfig
Code:

wlan0     Link encap:Ethernet  HWaddr 00:1c:f0:0d:ed:12
          inet addr:192.168.100.1  Bcast:192.168.100.3  Mask:255.255.255.252
          inet6 addr: fe80::21c:f0ff:fe0d:ed12/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:302 errors:0 dropped:0 overruns:0 frame:0
          TX packets:286 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:22634 (22.1 KiB)  TX bytes:46943 (45.8 KiB)



boh, ifconfig indica che si scambiano dati, ma i due computer non scambiano nessun pacchetto quando sono collegati tra loro... non capisco

script iptables
Code:


#!/bin/bash

#First we flush our current rules
 iptables -F
 iptables -t nat -F

#Setup default policies to handle unmatched traffic
 iptables -P INPUT ACCEPT
 iptables -P OUTPUT ACCEPT
 iptables -P FORWARD DROP

#Copy and paste these examples ...
 export WAN=eth1
 export LAN=eth0
 export WLAN=wlan0

#Then we lock our services so they only work from the LAN
 iptables -I INPUT 1 -i ${LAN} -j ACCEPT
 iptables -I INPUT 1 -i lo -j ACCEPT
 iptables -A INPUT -p UDP --dport bootps ! -i ${LAN} -j REJECT
 iptables -A INPUT -p UDP --dport domain ! -i ${LAN} -j REJECT

#(Optional) Allow access to our ssh server from the WAN
 iptables -A INPUT -p TCP --dport ssh -i ${WAN} -j ACCEPT

#Drop TCP / UDP packets to privileged ports
 iptables -A INPUT -p TCP ! -i ${LAN} -d 0/0 --dport 0:1023 -j DROP
 iptables -A INPUT -p UDP ! -i ${LAN} -d 0/0 --dport 0:1023 -j DROP

#Finally we add the rules for NAT
 iptables -I FORWARD -i ${LAN} -d 192.168.0.0/255.255.0.0 -j DROP
 iptables -A FORWARD -i ${LAN} -s 192.168.0.0/255.255.0.0 -j ACCEPT
 iptables -A FORWARD -i ${WAN} -d 192.168.0.0/255.255.0.0 -j ACCEPT
 iptables -A FORWARD -i ${WLAN} -s 192.168.100.0/255.255.0.0 -j ACCEPT
 iptables -t nat -A POSTROUTING -o ${WAN} -j MASQUERADE
#Tell the kernel that ip forwarding is OK
 echo 1 > /proc/sys/net/ipv4/ip_forward
 for f in /proc/sys/net/ipv4/conf/*/rp_filter ; do echo 1 > $f ; done
#Regole aMule
 iptables -A INPUT -p tcp --dport 4662 -j ACCEPT
 iptables -A INPUT -p udp --dport 4665 -j ACCEPT
 iptables -A INPUT -p udp --dport 4672 -j ACCEPT

 iptables -A INPUT -p tcp --dport 4762 -j ACCEPT
 iptables -A INPUT -p udp --dport 4765 -j ACCEPT
 iptables -A INPUT -p udp --dport 4772 -j ACCEPT

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alegioit
Tux's lil' helper
Tux's lil' helper


Joined: 13 Jul 2007
Posts: 78

PostPosted: Wed Jan 06, 2010 1:46 pm    Post subject: Reply with quote

Uhm... mi sono accorto che iptables così com'era non poteva funzionare... adesso dovrebbe andare bene, ma comunque i due computer non si scambiano lo stesso nessun pacchetto....

Code:

#!/bin/bash

#First we flush our current rules
 iptables -F
 iptables -t nat -F

#Setup default policies to handle unmatched traffic
 iptables -P INPUT ACCEPT
 iptables -P OUTPUT ACCEPT
 iptables -P FORWARD DROP

#Copy and paste these examples ...
 export WAN=eth1
 export LAN=eth0
 export WLAN=wlan0

#Then we lock our services so they only work from the LAN
 iptables -I INPUT 1 -i ${LAN} -j ACCEPT
 iptables -I INPUT 1 -i lo -j ACCEPT
 iptables -A INPUT -p UDP --dport bootps ! -i ${LAN} -j REJECT
 iptables -A INPUT -p UDP --dport domain ! -i ${LAN} -j REJECT

#Then we lock our services so they only work from the WLAN
 iptables -I INPUT 1 -i ${WLAN} -j ACCEPT
 iptables -A INPUT -p UDP --dport bootps ! -i ${WLAN} -j REJECT
 iptables -A INPUT -p UDP --dport domain ! -i ${WLAN} -j REJECT

#(Optional) Allow access to our ssh server from the WAN
 iptables -A INPUT -p TCP --dport ssh -i ${WAN} -j ACCEPT

#Drop TCP / UDP packets to privileged ports
 iptables -A INPUT -p TCP ! -i ${LAN} -d 0/0 --dport 0:1023 -j DROP
 iptables -A INPUT -p UDP ! -i ${LAN} -d 0/0 --dport 0:1023 -j DROP

#Drop TCP / UDP packets to privileged ports
 iptables -A INPUT -p TCP ! -i ${WLAN} -d 0/0 --dport 0:1023 -j DROP
 iptables -A INPUT -p UDP ! -i ${WLAN} -d 0/0 --dport 0:1023 -j DROP

#Finally we add the rules for NAT
 iptables -I FORWARD -i ${LAN} -d 192.168.0.0/255.255.0.0 -j DROP
 iptables -A FORWARD -i ${LAN} -s 192.168.0.0/255.255.0.0 -j ACCEPT
 iptables -I FORWARD -i ${WLAN} -d 192.168.100.0/255.255.0.0 -j DROP
 iptables -A FORWARD -i ${WLAN} -s 192.168.100.0/255.255.0.0 -j ACCEPT
 iptables -A FORWARD -i ${WAN} -d 192.168.0.0/255.255.0.0 -j ACCEPT
 iptables -t nat -A POSTROUTING -o ${WAN} -j MASQUERADE
#Tell the kernel that ip forwarding is OK
 echo 1 > /proc/sys/net/ipv4/ip_forward
 for f in /proc/sys/net/ipv4/conf/*/rp_filter ; do echo 1 > $f ; done
#Regole aMule
 iptables -A INPUT -p tcp --dport 4662 -j ACCEPT
 iptables -A INPUT -p udp --dport 4665 -j ACCEPT
 iptables -A INPUT -p udp --dport 4672 -j ACCEPT

 iptables -A INPUT -p tcp --dport 4762 -j ACCEPT
 iptables -A INPUT -p udp --dport 4765 -j ACCEPT
 iptables -A INPUT -p udp --dport 4772 -j ACCEPT

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xdarma
l33t
l33t


Joined: 08 Dec 2003
Posts: 682
Location: tra veneto e friuli (italy)

PostPosted: Wed Jan 06, 2010 1:53 pm    Post subject: Re: connessione wireless ad-hoc non funzionante... Reply with quote

alegioit wrote:

#rete wifi
config_wlan0="192.168.100.1 netmask 255.255.255.252 broadcast 192.168.100.3"

L'altro pc (su cui gira xp) ha indirizzo 192.168.0.2 netmask 255.255.255.252 bc 192.168.0.3

Non c'ho capito una mazza, ma:
- forse hai bisogno di un gateway perché wlan0 del server è sulla rete 192.168.100.x mentre eth0 di xp è in 192.168.0.x;
- posta anche il risultato di: route -n

Ciao.
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alegioit
Tux's lil' helper
Tux's lil' helper


Joined: 13 Jul 2007
Posts: 78

PostPosted: Wed Jan 06, 2010 2:00 pm    Post subject: Reply with quote

gnem.... era lo script di iptables... con il secondo che ho scritto funziona tutto!!!
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