Problema internet sharing Xubuntu 14.04

Am configurat internet sharing-ul si tabelele de rutare conform tutorialului de aici(metoda manuala - iptables):

https://help.ubuntu....nnectionSharing

Nu inteleg de ce unele site-uri funtioneaza normal pe statiile din reteaua locala  iar altele se incarca extrem de greu sau deloc.  Am net de rds prin conexiune pppoe.

Ca exemplu http://www.rcs-rds.ro NU se incarca iar http://www.digi24.ro DA. Nu este o problema de dns, numele sunt translatate si la cele ce nu se incarca .

Multumesc !

Edited by CPX, 14 December 2014 - 00:55.

Pai da si tu mai multe detalii, ca nu am cum sa aflu din cer de ce nu merge. E.g. adresele IP locale, si de unde merge si unde nu merge (ifconfig). Tabelele de routare (ip ro sh) si tabelele de filtrare (iptables -L si iptables -t nat -L)

Dar, ca principiu, aplica traceroute (sau mtr) si vezi care sunt diferentele intre ce merge si ce nu merge.

ppp0/p1p1 este conexiunea  la rds iar p2p1 este conectata la switch.

lo    Link encap:Local Loopback
  inet addr:127.0.0.1  Mask:255.0.0.0
  inet6 addr: ::1/128 Scope:Host
  UP LOOPBACK RUNNING  MTU:65536  Metric:1
  RX packets:177 errors:0 dropped:0 overruns:0 frame:0
  TX packets:177 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:0
  RX bytes:13061 (13.0 KB)  TX bytes:13061 (13.0 KB)

p1p1  Link encap:Ethernet  HWaddr c4:6e:1f:01:cd:7e
  inet6 addr: fe80::c66e:1fff:fe01:cd7e/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:209831 errors:0 dropped:22 overruns:0 frame:0
  TX packets:209018 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:90044814 (90.0 MB)  TX bytes:190054994 (190.0 MB)

p2p1  Link encap:Ethernet  HWaddr 40:16:7e:af:aa:20
  inet addr:192.168.0.10  Bcast:192.168.0.255  Mask:255.255.255.0
  inet6 addr: fe80::4216:7eff:feaf:aa20/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:201921 errors:0 dropped:0 overruns:0 frame:0
  TX packets:201474 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:187799234 (187.7 MB)  TX bytes:84421139 (84.4 MB)

ppp0  Link encap:Point-to-Point Protocol
  inet addr:79.119.99.167  P-t-P:10.0.0.1  Mask:255.255.255.255
  inet6 addr: fe80::4f77:63a7/10 Scope:Link
  UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
  RX packets:209776 errors:0 dropped:0 overruns:0 frame:0
  TX packets:208962 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:3
  RX bytes:85424136 (85.4 MB)  TX bytes:185452466 (185.4 MB)

iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source    destination
Chain FORWARD (policy ACCEPT)
target prot opt source    destination
ACCEPT all  --  192-168-0-0.rdsnet.ro/24  anywhere ctstate NEW
ACCEPT all  --  anywhere anywhere ctstate RELATED,ESTABLISHED
Chain OUTPUT (policy ACCEPT)
target prot opt source    destination

route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 0.0.0.0    0.0.0.0 U 0   0 0 ppp0
10.0.0.1    0.0.0.0 255.255.255.255 UH 0   0 0   ppp0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000   0 0  p2p1
192.168.0.0 0.0.0.0 255.255.255.0 U 0   0 0 p2p1

ip ro
default dev ppp0  scope link
10.0.0.1 dev ppp0  proto kernel  scope link  src 79.119.111.196
169.254.0.0/16 dev p2p1  scope link  metric 1000
192.168.0.0/24 dev p2p1  proto kernel  scope link  src 192.168.0.10

arp -a
192-168-0-100.rdsnet.ro (192.168.0.100) at 00:1a:4d:43:2d:00 [ether] on p2p1


ex1: Site ce NU merge pe statii:

Traceroute pe statie:
TraceRoute from Network-Tools.com to 81.196.12.81 [www.rds-rcs.ro]
Hop (ms) (ms) (ms)    IP Address Host name
1 0 0 0    64.124.196.225  xe-4-2-0.er2.dfw2.us.above.net
2 32 1 0    64.125.20.233  ae7.cr2.dfw2.us.above.net
3 24 8 8    64.125.21.62  ae2.cr2.iah1.us.above.net
4 36 36 36    64.125.21.53  ae14.cr2.dca2.us.above.net
5 112 112 112    64.125.31.185  xe-5-1-0.mpr3.lhr3.uk.above.net
6 115 115 115    64.125.28.21   -
7 111 111 111    64.125.31.193  ae10.mpr1.lhr1.uk.above.net
8 109 109 109    195.66.224.46  xr01.london.rdsnet.ro
9 151 151 151    213.154.128.67  zr01.bucuresti.rdsnet.ro
10 Timed out Timed out Timed out -
11 Timed out Timed out Timed out -

Traceroute pe server:
traceroute to www.rds-rcs.ro (81.196.12.81), 30 hops max, 60 byte packets
1  10.0.0.1 (10.0.0.1)  1.296 ms  1.240 ms  1.222 ms
2  10.32.9.97 (10.32.9.97)  2.410 ms  2.493 ms  2.102 ms
3  zr01.bucuresti.rdsnet.ro (213.154.128.67)  6.939 ms  6.895 ms  6.989 ms
4  * * *
5  * * *
6  * * *
7  * * *

ex2: Site ce merge pe statii:

Traceroute pe statie:
TraceRoute from Network-Tools.com to 98.138.253.109 [www.yahoo.com]
Hop (ms) (ms) (ms)    IP Address Host name
1 0 0 0    64.124.196.225  xe-4-2-0.er2.dfw2.us.above.net
2 0 0 0    206.223.118.2  exchange-cust2.da1.equinix.net
3 47 69 51    216.115.96.58  ae-3.pat2.dnx.yahoo.com
4 51 51 51    216.115.96.70  ae-5.pat2.nez.yahoo.com
5 46 49 49    216.115.100.7  ae-1.msr2.ne1.yahoo.com
6 45 50 49    98.138.97.5  ae-4.clr1-a-gdc.ne1.yahoo.com
7 65 50 50    98.138.0.79  et-17-1.fab1-1-gdc.ne1.yahoo.com
8 50 51 60    98.138.240.22  po-10.bas2-7-prd.ne1.yahoo.com
9 46 50 51    98.138.253.109  ir1.fp.vip.ne1.yahoo.com
Trace complete

Traceroute pe server:

traceroute to www.yahoo.com (46.228.47.115), 30 hops max, 60 byte packets
1  10.0.0.1 (10.0.0.1)  0.304 ms  0.284 ms  0.267 ms
2  10.30.3.1 (10.30.3.1)  1.771 ms  2.200 ms  2.295 ms
3  xr01.amsterdam.rdsnet.ro (213.154.124.86)  58.015 ms xr01.frankfurt.rdsnet.ro (213.154.125.41)  19.934 ms xr01.amsterdam.rdsnet.ro (213.154.124.23)  41.390 ms
4  ge-1-3-0.pat1.dee.yahoo.com (80.81.192.115)  32.188 ms  26.039 ms  25.986 ms
5  so-2-0-0.pat1.ams.yahoo.com (66.196.65.144)  33.519 ms  26.226 ms  43.247 ms
6  ae-5.pat1.iry.yahoo.com (216.115.104.64)  45.679 ms  51.722 ms ae-2.msr1.ir2.yahoo.com (66.196.65.157)  61.398 ms
7  ae-2.msr2.ir2.yahoo.com (66.196.65.159)  45.800 ms et-18-17.bas2-2-prd.ir2.yahoo.com (217.146.185.168)  75.303 ms ae-2.msr1.ir2.yahoo.com (66.196.65.157)  62.735 ms
8  et-17-18.bas2-2-prd.ir2.yahoo.com (77.238.186.49)  52.333 ms et-18-9.bas1-2-prd.ir2.yahoo.com (217.146.185.182)  56.426 ms et-18-17.bas2-2-prd.ir2.yahoo.com (217.146.185.168)  60.373 ms
9  * * *
10  * * *

ex3: Site ce NU merge pe statii:

Traceroute pe statie:
TraceRoute from Network-Tools.com to 91.189.94.12 [ubuntuforums.org]
Hop (ms) (ms) (ms)    IP Address Host name
1 Timed out Timed out Timed out -
2 103 103 103    4.69.166.53  ae-234-3610.edge5.london1.level3.net
3 103 103 114    4.69.166.53  ae-234-3610.edge5.london1.level3.net
4 103 103 103    212.187.138.82  source-mana.edge5.london1.level3.net
5 104 104 104    91.189.88.10  eth0.lutin.canonical.com
6 103 103 103    91.189.94.12  feijoa.canonical.com

Traceroute pe server:
traceroute to www.ubuntuforums.com (91.189.94.12), 30 hops max, 60 byte packets
1  10.0.0.1 (10.0.0.1)  1.074 ms  1.029 ms  1.128 ms
2  10.30.3.1 (10.30.3.1)  2.452 ms  2.120 ms  2.672 ms
3  xr01.londra.rdsnet.ro (213.154.124.57)  40.623 ms xr01.londra.rdsnet.ro (213.154.124.53)  40.480 ms  40.592 ms
4  213-154-130-62.rdsnet.ro (213.154.130.62)  57.191 ms  57.225 ms  57.205 ms
5  ae1-core0.thnor.uk.as6908.net (62.149.50.138)  40.393 ms  40.363 ms  42.590 ms
6  ae1-core1.thnor.uk.as6908.net (62.149.50.214)  45.158 ms  43.387 ms  43.354 ms
7  213.206.156.149 (213.206.156.149)  46.749 ms  47.807 ms  46.829 ms
8  sl-crs1-lon-0-0-3-0.sprintlink.net (213.206.128.180)  46.780 ms  48.226 ms sl-crs1-lon-0-2-0-0.sprintlink.net (213.206.129.152)  48.711 ms
9  213.206.131.22 (213.206.131.22)  48.348 ms  47.811 ms  47.989 ms
10  ae-125-3511.edge5.london1.Level3.net (4.69.166.41)  48.034 ms ae-126-3512.edge5.london1.Level3.net (4.69.166.45)  45.976 ms ae-124-3510.edge5.london1.Level3.net (4.69.166.37)  48.129 ms
11  SOURCE-MANA.edge5.London1.Level3.net (212.187.138.82)  48.747 ms  48.728 ms  48.621 ms
12  eth0.lutin.canonical.com (91.189.88.10)  48.597 ms  46.679 ms  46.564 ms
13  * * *
14  * * *
15  * * *

Edited by CPX, 14 December 2014 - 16:05.

Revin cu teste facute prin rooter(unde toate site-urile merg)

TraceRoute from Network-Tools.com to 81.196.12.81 [www.rds-rcs.ro]
Hop (ms) (ms) (ms)    IP Address Host name
1    0    0    0    64.124.196.225  xe-4-2-0.er2.dfw2.us.above.net
2    0    30    6    64.125.20.233  ae7.cr2.dfw2.us.above.net
3    31    32    8    64.125.21.62  ae2.cr2.iah1.us.above.net
4    36    38    36    64.125.21.53  ae14.cr2.dca2.us.above.net
5    115    115    115    64.125.27.34  ae7.cr1.ams10.nl.above.net
6    115    115    115    64.125.28.242  ae9.mpr3.lhr3.uk.above.net
7    115    115    115    64.125.21.22  ae6.mpr2.lhr3.uk.above.net
8    115    115    115    64.125.27.49  ae11.mpr1.lhr1.uk.above.net
9    114    114    115    195.66.224.46  xr01.london.rdsnet.ro
10    160    160    160    213.154.128.67  zr01.bucuresti.rdsnet.ro
11    Timed out    Timed out    Timed out -
12    Timed out    Timed out    Timed out -

TraceRoute from Network-Tools.com to 98.138.252.30 [www.yahoo.com]
Hop (ms) (ms) (ms)    IP Address Host name
1    0    0    0    64.124.196.225  xe-4-2-0.er2.dfw2.us.above.net
2    0    0    0    206.223.118.2  exchange-cust2.da1.equinix.net
3    52    52    63    216.115.96.58  ae-3.pat2.dnx.yahoo.com
4    50    45    51    216.115.96.70  ae-5.pat2.nez.yahoo.com
5    46    46    50    216.115.100.3  ae-0.msr2.ne1.yahoo.com
6    50    51    50    98.138.144.21  ae-0.clr1-a-gdc.ne1.yahoo.com
7    51    50    50    98.138.97.51  unknown-98-138-97-x.yahoo.com
8    50    47    47    98.138.240.16  po-15.bas1-7-prd.ne1.yahoo.com
9    51    49    49    98.138.252.30  ir2.fp.vip.ne1.yahoo.com
Trace complete


TraceRoute from Network-Tools.com to 91.189.94.12 [ubuntuforums.org]
Hop (ms) (ms) (ms)    IP Address Host name
1    Timed out    Timed out    Timed out -
2    103    103    103    4.69.166.53  ae-234-3610.edge5.london1.level3.net
3    103    103    103    4.69.166.53  ae-234-3610.edge5.london1.level3.net
4    103    104    103    212.187.138.82  source-mana.edge5.london1.level3.net
5    104    105    104    91.189.88.10  eth0.lutin.canonical.com
6    103    103    103    91.189.94.12  feijoa.canonical.com


Deci trace-ul prin rooter arata exact ca cel prin server. Totusi siturile nu merg corect prin server...

Am rezolvat..valorea MTU la conexiunea Pppoe erea prea mare.

Edited by CPX, 16 December 2014 - 02:16.