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Dotaz: pripojeni k internetu pres eth a ppp na ubuntu

3.1.2007 16:00 Roman
pripojeni k internetu pres eth a ppp na ubuntu
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Odpovědět | Admin
Mam dva pocitace, na jednom XP home a na druhem Ubuntu 6.06. Na ubuntu mam pripojeni k internetu pres dialup (ppp0) a lokalni ethernet (eth0). Na XP mam jen ethernet. Rozhodl jsem se, ze ty dva pocitace spojim krizovym sitovym kabelem, abych mohl na internet i z XP.

Snazil jsem se to nakonfigurovat sam a dosahl jsem dilcich uspechu, ale ne cile. Na Ubuntu jsem nastavil dhcp server a ve windows pripojeni k siti pres dhcp. To funguje dobre, windows se samy nakonfiguruji a spojeni mezi pocitaci funguje. Overeno pingem. Co mi nejde je z XP si pingnout na internet, ani na ip adresu ani na url. Pise to, ze "Vyprsel casovy limit zadosti". Potrebuji poradit, co jsem udelal spatne.

Dekuji.

Nastaveni /etc/dhcp3/dhcpd.conf mam toto: 
subnet 192.168.0.0 netmask 255.255.255.0 {
  range 192.168.0.100 192.168.0.200;
  option domain-name-servers 160.218.10.200, 160.218.43.200;
  option domain-name "roman-net";
  option routers 192.168.0.1;
  option broadcast-address 192.168.0.255;
  default-lease-time 600;
  max-lease-time 7200;
}
U option routers, kteremu nerozumim, jsem zkousel nastavit i 192.168.0.7, coz je IP aderesa eth0 Ubuntu, ale nemelo to na nic vliv.

Firewall a NAT mam nastaveny pres firehol v /etc/firehol/firehol.conf 
version 5
	
interface eth0 ethernet
	policy						drop
	server "dns ftp samba squid dhcp http ssh icmp"	accept
	client "ssh samba icmp"				accept

interface ppp+ internet
	policy			drop
	client all		accept


router ethernet2internet inface eth0 outface ppp+
	masquerade
	route all accept
Podle tohoto je iptables nastaveno takto (iptables -L): 
Chain INPUT (policy DROP)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            
in_ethernet  all  --  anywhere             anywhere            
in_internet  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `'IN-unknown:'' 
DROP       all  --  anywhere             anywhere            

Chain FORWARD (policy DROP)
target     prot opt source               destination         
in_ethernet2internet  all  --  anywhere             anywhere            
out_ethernet2internet  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `'PASS-unknown:'' 
DROP       all  --  anywhere             anywhere            

Chain OUTPUT (policy DROP)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            
out_ethernet  all  --  anywhere             anywhere            
out_internet  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `'OUT-unknown:'' 
DROP       all  --  anywhere             anywhere            

Chain in_ethernet (1 references)
target     prot opt source               destination         
in_ethernet_dns_s1  all  --  anywhere             anywhere            
in_ethernet_ftp_s2  all  --  anywhere             anywhere            
in_ethernet_samba_s3  all  --  anywhere             anywhere            
in_ethernet_squid_s4  all  --  anywhere             anywhere            
in_ethernet_dhcp_s5  all  --  anywhere             anywhere            
in_ethernet_http_s6  all  --  anywhere             anywhere            
in_ethernet_ssh_s7  all  --  anywhere             anywhere            
in_ethernet_icmp_s8  all  --  anywhere             anywhere            
in_ethernet_ssh_c9  all  --  anywhere             anywhere            
in_ethernet_samba_c10  all  --  anywhere             anywhere            
in_ethernet_icmp_c11  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `''IN-ethernet':'' 
DROP       all  --  anywhere             anywhere            

Chain in_ethernet2internet (1 references)
target     prot opt source               destination         
in_ethernet2internet_all_s1  all  --  anywhere             anywhere            
in_ethernet2internet_irc_s2  all  --  anywhere             anywhere            
in_ethernet2internet_ftp_s3  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 

Chain in_ethernet2internet_all_s1 (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            state NEW,ESTABLISHED 

Chain in_ethernet2internet_ftp_s3 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ftp state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ftp-data state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpts:1024:65535 state RELATED,ESTABLISHED 

Chain in_ethernet2internet_irc_s2 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ircd state NEW,ESTABLISHED 

Chain in_ethernet_dhcp_s5 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:bootpc dpt:bootps state NEW,ESTABLISHED 

Chain in_ethernet_dns_s1 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp dpt:domain state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp dpt:domain state NEW,ESTABLISHED 

Chain in_ethernet_ftp_s2 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ftp state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ftp-data state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpts:32768:61000 state RELATED,ESTABLISHED 

Chain in_ethernet_http_s6 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:www state NEW,ESTABLISHED 

Chain in_ethernet_icmp_c11 (1 references)
target     prot opt source               destination         
ACCEPT     icmp --  anywhere             anywhere            state ESTABLISHED 

Chain in_ethernet_icmp_s8 (1 references)
target     prot opt source               destination         
ACCEPT     icmp --  anywhere             anywhere            state NEW,ESTABLISHED 

Chain in_ethernet_samba_c10 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-ns dpt:netbios-ns state ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-ns dpts:32768:61000 state ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-dgm dpt:netbios-dgm state ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-dgm dpts:32768:61000 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:netbios-ssn dpts:32768:61000 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:microsoft-ds dpts:32768:61000 state ESTABLISHED 

Chain in_ethernet_samba_s3 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-ns dpt:netbios-ns state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spts:1024:65535 dpt:netbios-ns state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-dgm dpt:netbios-dgm state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spts:1024:65535 dpt:netbios-dgm state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:netbios-ssn state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:microsoft-ds state NEW,ESTABLISHED 

Chain in_ethernet_squid_s4 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:3128 state NEW,ESTABLISHED 

Chain in_ethernet_ssh_c9 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ssh dpts:32768:61000 state ESTABLISHED 

Chain in_ethernet_ssh_s7 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpt:ssh state NEW,ESTABLISHED 

Chain in_internet (1 references)
target     prot opt source               destination         
in_internet_all_c1  all  --  anywhere             anywhere            
in_internet_irc_c2  all  --  anywhere             anywhere            
in_internet_ftp_c3  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `''IN-internet':'' 
DROP       all  --  anywhere             anywhere            

Chain in_internet_all_c1 (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            state ESTABLISHED 

Chain in_internet_ftp_c3 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ftp dpts:32768:61000 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ftp-data dpts:32768:61000 state RELATED,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpts:32768:61000 state ESTABLISHED 

Chain in_internet_irc_c2 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ircd dpts:32768:61000 state ESTABLISHED 

Chain out_ethernet (1 references)
target     prot opt source               destination         
out_ethernet_dns_s1  all  --  anywhere             anywhere            
out_ethernet_ftp_s2  all  --  anywhere             anywhere            
out_ethernet_samba_s3  all  --  anywhere             anywhere            
out_ethernet_squid_s4  all  --  anywhere             anywhere            
out_ethernet_dhcp_s5  all  --  anywhere             anywhere            
out_ethernet_http_s6  all  --  anywhere             anywhere            
out_ethernet_ssh_s7  all  --  anywhere             anywhere            
out_ethernet_icmp_s8  all  --  anywhere             anywhere            
out_ethernet_ssh_c9  all  --  anywhere             anywhere            
out_ethernet_samba_c10  all  --  anywhere             anywhere            
out_ethernet_icmp_c11  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `''OUT-ethernet':'' 
DROP       all  --  anywhere             anywhere            

Chain out_ethernet2internet (1 references)
target     prot opt source               destination         
out_ethernet2internet_all_s1  all  --  anywhere             anywhere            
out_ethernet2internet_irc_s2  all  --  anywhere             anywhere            
out_ethernet2internet_ftp_s3  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 

Chain out_ethernet2internet_all_s1 (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            state ESTABLISHED 

Chain out_ethernet2internet_ftp_s3 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ftp dpts:1024:65535 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ftp-data dpts:1024:65535 state RELATED,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:1024:65535 dpts:1024:65535 state ESTABLISHED 

Chain out_ethernet2internet_irc_s2 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ircd dpts:1024:65535 state ESTABLISHED 

Chain out_ethernet_dhcp_s5 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:bootps dpt:bootpc state ESTABLISHED 

Chain out_ethernet_dns_s1 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:domain state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:domain state ESTABLISHED 

Chain out_ethernet_ftp_s2 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ftp dpts:1024:65535 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ftp-data dpts:1024:65535 state RELATED,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpts:1024:65535 state ESTABLISHED 

Chain out_ethernet_http_s6 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:www dpts:1024:65535 state ESTABLISHED 

Chain out_ethernet_icmp_c11 (1 references)
target     prot opt source               destination         
ACCEPT     icmp --  anywhere             anywhere            state NEW,ESTABLISHED 

Chain out_ethernet_icmp_s8 (1 references)
target     prot opt source               destination         
ACCEPT     icmp --  anywhere             anywhere            state ESTABLISHED 

Chain out_ethernet_samba_c10 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-ns dpt:netbios-ns state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spts:32768:61000 dpt:netbios-ns state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-dgm dpt:netbios-dgm state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spts:32768:61000 dpt:netbios-dgm state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpt:netbios-ssn state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpt:microsoft-ds state NEW,ESTABLISHED 

Chain out_ethernet_samba_s3 (1 references)
target     prot opt source               destination         
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-ns dpt:netbios-ns state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-ns dpts:1024:65535 state NEW,ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-dgm dpt:netbios-dgm state ESTABLISHED 
ACCEPT     udp  --  anywhere             anywhere            udp spt:netbios-dgm dpts:1024:65535 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:netbios-ssn dpts:1024:65535 state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:microsoft-ds dpts:1024:65535 state ESTABLISHED 

Chain out_ethernet_squid_s4 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:3128 dpts:1024:65535 state ESTABLISHED 

Chain out_ethernet_ssh_c9 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpt:ssh state NEW,ESTABLISHED 

Chain out_ethernet_ssh_s7 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spt:ssh dpts:1024:65535 state ESTABLISHED 

Chain out_internet (1 references)
target     prot opt source               destination         
out_internet_all_c1  all  --  anywhere             anywhere            
out_internet_irc_c2  all  --  anywhere             anywhere            
out_internet_ftp_c3  all  --  anywhere             anywhere            
ACCEPT     all  --  anywhere             anywhere            state RELATED 
LOG        all  --  anywhere             anywhere            limit: avg 1/sec burst 5 LOG level warning prefix `''OUT-internet':'' 
DROP       all  --  anywhere             anywhere            

Chain out_internet_all_c1 (1 references)
target     prot opt source               destination         
ACCEPT     all  --  anywhere             anywhere            state NEW,ESTABLISHED 

Chain out_internet_ftp_c3 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpt:ftp state NEW,ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpt:ftp-data state ESTABLISHED 
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpts:1024:65535 state RELATED,ESTABLISHED 

Chain out_internet_irc_c2 (1 references)
target     prot opt source               destination         
ACCEPT     tcp  --  anywhere             anywhere            tcp spts:32768:61000 dpt:ircd state NEW,ESTABLISHED
A ifconfig vypisuje tohle: 
eth0      Zapouzdření:Ethernet  HWadr 00:10:C6:DC:BB:0B  
          inet adr:192.168.0.7  Všesměr:192.168.0.255  Maska:255.255.255.0
          inet6-adr: fe80::210:c6ff:fedc:bb0b/64 Rozsah:Linka
          AKTIVOVÁNO VŠESMĚROVÉ_VYSÍLÁNÍ BĚŽÍ MULTICAST  MTU:1500  Metrika:1
          RX packets:128 errors:0 dropped:0 overruns:0 frame:0
          TX packets:39 errors:0 dropped:0 overruns:0 carrier:0
          kolizí:0 délka odchozí fronty:1000 
          Přijato bajtů: 17238 (16.8 KiB) Odesláno bajtů: 5482 (5.3 KiB)
          Přerušení:169 

eth1      Zapouzdření:Ethernet  HWadr 00:13:CE:96:24:2A  
          inet adr:192.168.1.7  Všesměr:192.168.1.255  Maska:255.255.255.0
          AKTIVOVÁNO VŠESMĚROVÉ_VYSÍLÁNÍ MULTICAST  MTU:1500  Metrika:1
          RX packets:25770 errors:0 dropped:16 overruns:0 frame:0
          TX packets:34670 errors:0 dropped:0 overruns:0 carrier:1
          kolizí:0 délka odchozí fronty:1000 
          Přijato bajtů: 204 (204.0 b) Odesláno bajtů: 432 (432.0 b)
          Přerušení:58 Vstupně/Výstupní port:0xe000 Paměť:a8401000-a8401fff 

lo        Zapouzdření:Místní smyčka  
          inet adr:127.0.0.1  Maska:255.0.0.0
          inet6-adr: ::1/128 Rozsah:Počítač
          AKTIVOVÁNO SMYČKA BĚŽÍ  MTU:16436  Metrika:1
          RX packets:59 errors:0 dropped:0 overruns:0 frame:0
          TX packets:59 errors:0 dropped:0 overruns:0 carrier:0
          kolizí:0 délka odchozí fronty:0 
          Přijato bajtů: 3740 (3.6 KiB) Odesláno bajtů: 3740 (3.6 KiB)

ppp0      Zapouzdření:Point-to-Point Protokol  
          inet adr:10.176.18.17  P-t-P:10.6.6.6  Maska:255.255.255.255
          AKTIVOVÁNO POINTOPOINT BĚŽÍ NEARP MULTICAST  MTU:1500  Metrika:1
          RX packets:4729 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4836 errors:0 dropped:0 overruns:0 carrier:0
          kolizí:0 délka odchozí fronty:3 
          Přijato bajtů: 4176803 (3.9 MiB) Odesláno bajtů: 685167 (669.1 KiB)
To eth1 je nepouzivana wifi.
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Odpovědi

3.1.2007 16:32 Petr Šobáň | skóre: 80 | blog: soban | Olomouc
Rozbalit Rozbalit vše Re: pripojeni k internetu pres eth a ppp na ubuntu
Odpovědět | | Sbalit | Link | Blokovat | Admin
Když je eth1 nepoužívaná proč je nahozená ? Zrušit.

Asi budeš mět špatně nastavenej NAT, nebo nemáš default routu na ppp0 a ty pravidla luštit nebudu kvuli dvoum PC tolik pravidel na co tam jsou ?

Takže výpis ip route musí být default na tu ppp0. (skontrolovat)

Jinak ještě skontrolujte zda máte povolen forward 
[petr@soban ~]$ cat /proc/sys/net/ipv4/ip_forward
1
Pokud tam máte 0 tak zapsát 1.
3.1.2007 18:55 Roman
Rozbalit Rozbalit vše Re: pripojeni k internetu pres eth a ppp na ubuntu
Zrusil jsem eth1, forward povolen je. Tolik pravidel nastavil firehol. Vypis ip route je: 
10.6.6.6 dev ppp0  proto kernel  scope link  src 10.176.18.17
192.168.0.0/24 dev eth0  proto kernel  scope link  src 192.168.0.7
default dev ppp0  scope link
3.1.2007 19:14 Petr Šobáň | skóre: 80 | blog: soban | Olomouc
Rozbalit Rozbalit vše Re: pripojeni k internetu pres eth a ppp na ubuntu
Tak se potom kouknot do pravidel zda se to někde není zablokované, jinak na těch windowsech nastavils tam DNS servery aby fungoval překlad jména na IP.

Když v IE zadáš www.abclinuxu.cz tak to napíše co ?

Co takhle firewal na windows ?
7.1.2007 21:41 Roman
Rozbalit Rozbalit vše Re: pripojeni k internetu pres eth a ppp na ubuntu
Nerozumím co myslíte těmi pravidly, jaká a kde, na linuxu nebo windows? A co mám vidět nebo nevidět?

Ve windows DNS nastaveno není, o to se přece musí postarat DHCP (navíc DNS získávám dynamicky od dialup providera při každém pripojení) a jak jsem uvedl, nejde si pingnout ani na IP adresu, takže to s tím nemá žádnou souvislost.

IE nenapíše nic, co uvádí ping jsem již uvedl.

Firewall ve windows je vypnutý, hodlám spoléhat na ten linuxový, který představuje bránu do internetu.
7.1.2007 21:53 milda
Rozbalit Rozbalit vše Re: pripojeni k internetu pres eth a ppp na ubuntu
hele, pust si ethereal a snifuj na linuxu interfacy ať vidíš, kam to až dorazí, moc sem ty výpisy nestudoval, ale hod sem potom, kam to az dorazilo

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