Dotaz: Vzdálený Xserver a připojení přes router

[Jack]

Mám následující problém:
Potřebuji se připojit na vzdálený Xserver. Pokud provedu spoj přímo, aniž by procházel routerem, tak v tom není problém(pomocí X -query adresa). Pokud ale stojí v cestě router, na Xserver se nedostanu. Mám router "Linksys WRT54GC verze 2". Všimnul jsem si, že vzdálený Xserver se připojuje zpět na můj počítač na portu 6000. Vše co jde na port 6000 tedy z routeru posílám na moje PC (doufám, že to router na základě zadaného pravidla skutečně dělá).
Ethereal bez routeru:

No.     Time        Source                Destination           Protocol Info
     11 1.593105    84.42.128.227         147.32.244.18         XDMCP    Query

Frame 11 (49 bytes on wire, 49 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2863 (2863), Dst Port: 177 (177)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
     12 1.610809    147.32.244.18         84.42.128.227         XDMCP    Willing

Frame 12 (93 bytes on wire, 93 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
User Datagram Protocol, Src Port: 177 (177), Dst Port: 2863 (2863)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
     17 2.616409    84.42.128.227         147.32.244.18         XDMCP    Request

Frame 17 (145 bytes on wire, 145 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2863 (2863), Dst Port: 177 (177)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
     18 2.624238    147.32.244.18         84.42.128.227         XDMCP    Accept 

Frame 18 (94 bytes on wire, 94 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
User Datagram Protocol, Src Port: 177 (177), Dst Port: 2863 (2863)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
     19 2.624520    84.42.128.227         147.32.244.18         XDMCP    Manage

Frame 19 (71 bytes on wire, 71 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2863 (2863), Dst Port: 177 (177)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
     21 2.634063    147.32.244.18         84.42.128.227         TCP      56698 > 6000 [SYN] Seq=0 Len=0 MSS=1460 TSV=217455821 TSER=0 WS=7

Frame 21 (74 bytes on wire, 74 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 0, Len: 0

No.     Time        Source                Destination           Protocol Info
     22 2.634114    84.42.128.227         147.32.244.18         TCP      6000 > 56698 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460 WS=0 TSV=0 TSER=0

Frame 22 (78 bytes on wire, 78 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 0, Ack: 1, Len: 0

No.     Time        Source                Destination           Protocol Info
     23 2.664089    147.32.244.18         84.42.128.227         TCP      56698 > 6000 [ACK] Seq=1 Ack=1 Win=5888 Len=0 TSV=217455828 TSER=0

Frame 23 (66 bytes on wire, 66 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 1, Ack: 1, Len: 0

No.     Time        Source                Destination           Protocol Info
     24 2.664190    147.32.244.18         84.42.128.227         X11      Initial connection request

Frame 24 (114 bytes on wire, 114 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 1, Ack: 1, Len: 48
X11, Request, Initial connection request

No.     Time        Source                Destination           Protocol Info
     25 2.665376    84.42.128.227         147.32.244.18         X11      Initial connection reply

Frame 25 (374 bytes on wire, 374 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 1, Ack: 49, Len: 308
X11, Reply, Initial connection reply

No.     Time        Source                Destination           Protocol Info
     26 2.673313    147.32.244.18         84.42.128.227         TCP      56698 > 6000 [ACK] Seq=49 Ack=309 Win=6912 Len=0 TSV=217455830 TSER=295604

Frame 26 (66 bytes on wire, 66 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 49, Ack: 309, Len: 0

No.     Time        Source                Destination           Protocol Info
     27 2.673418    147.32.244.18         84.42.128.227         X11      Requests: CreateGC, QueryExtension, GetProperty

Frame 27 (130 bytes on wire, 130 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 49, Ack: 309, Len: 64
X11, Request, opcode: 55 (CreateGC)
X11, Request, opcode: 98 (QueryExtension)
X11, Request, opcode: 20 (GetProperty)

No.     Time        Source                Destination           Protocol Info
     28 2.673659    84.42.128.227         147.32.244.18         X11      Reply: QueryExtension, GetProperty

Frame 28 (130 bytes on wire, 130 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 309, Ack: 113, Len: 64
X11, Reply, opcode: 98 (QueryExtension)
X11, Reply, opcode: 20 (GetProperty)

No.     Time        Source                Destination           Protocol Info
     29 2.684534    147.32.244.18         84.42.128.227         X11      Requests: BIG-REQUESTS

Frame 29 (70 bytes on wire, 70 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 113, Ack: 373, Len: 4
X11, Request, opcode: 132 (BIG-REQUESTS)

No.     Time        Source                Destination           Protocol Info
     30 2.684754    84.42.128.227         147.32.244.18         X11      Reply: BIG-REQUESTS

Frame 30 (98 bytes on wire, 98 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 373, Ack: 117, Len: 32
X11, Reply, opcode: 132 (BIG-REQUESTS)

No.     Time        Source                Destination           Protocol Info
     31 2.691021    147.32.244.18         84.42.128.227         X11      Requests: QueryExtension

Frame 31 (86 bytes on wire, 86 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 117, Ack: 405, Len: 20
X11, Request, opcode: 98 (QueryExtension)

No.     Time        Source                Destination           Protocol Info
     32 2.691793    84.42.128.227         147.32.244.18         X11      Reply: QueryExtension

Frame 32 (98 bytes on wire, 98 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 405, Ack: 137, Len: 32
X11, Reply, opcode: 98 (QueryExtension)

No.     Time        Source                Destination           Protocol Info
     33 2.718951    147.32.244.18         84.42.128.227         X11      Requests: XKEYBOARD

Frame 33 (74 bytes on wire, 74 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 137, Ack: 437, Len: 8
X11, Request, opcode: 136 (XKEYBOARD)

No.     Time        Source                Destination           Protocol Info
     34 2.719189    84.42.128.227         147.32.244.18         X11      Reply: XKEYBOARD

Frame 34 (98 bytes on wire, 98 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 437, Ack: 145, Len: 32
X11, Reply, opcode: 136 (XKEYBOARD)

No.     Time        Source                Destination           Protocol Info
     35 2.754045    147.32.244.18         84.42.128.227         X11      Requests: OpenFont, QueryExtension

Frame 35 (102 bytes on wire, 102 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 145, Ack: 469, Len: 36
X11, Request, opcode: 45 (OpenFont)
X11, Request, opcode: 98 (QueryExtension)

No.     Time        Source                Destination           Protocol Info
     36 2.754275    84.42.128.227         147.32.244.18         X11      Reply: QueryExtension

Frame 36 (98 bytes on wire, 98 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 469, Ack: 181, Len: 32
X11, Reply, opcode: 98 (QueryExtension)

No.     Time        Source                Destination           Protocol Info
     38 2.769594    147.32.244.18         84.42.128.227         X11      Requests: RENDER, RENDER

Frame 38 (82 bytes on wire, 82 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 181, Ack: 501, Len: 16
X11, Request, opcode: 147 (RENDER)
X11, Request, opcode: 147 (RENDER)

No.     Time        Source                Destination           Protocol Info
     39 2.769904    84.42.128.227         147.32.244.18         X11      Reply: RENDER, RENDER

Frame 39 (846 bytes on wire, 846 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56698 (56698), Seq: 501, Ack: 197, Len: 780
X11, Reply, opcode: 147 (RENDER)
X11, Reply, opcode: 147 (RENDER)

No.     Time        Source                Destination           Protocol Info
     40 2.778110    147.32.244.18         84.42.128.227         X11      Requests: CreateGlyphCursor, ChangeWindowAttributes, FreeCursor

Frame 40 (122 bytes on wire, 122 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56698 (56698), Dst Port: 6000 (6000), Seq: 197, Ack: 1281, Len: 56
X11, Request, opcode: 94 (CreateGlyphCursor)
X11, Request, opcode: 2 (ChangeWindowAttributes)
X11, Request, opcode: 95 (FreeCursor)

No.     Time        Source                Destination           Protocol Info
     41 2.830979    147.32.244.18         84.42.128.227         TCP      56699 > 6000 [SYN] Seq=0 Len=0 MSS=1460 TSV=217455868 TSER=0 WS=7

Frame 41 (74 bytes on wire, 74 bytes captured)
Ethernet II, Src: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 84.42.128.227 (84.42.128.227)
Transmission Control Protocol, Src Port: 56699 (56699), Dst Port: 6000 (6000), Seq: 0, Len: 0

No.     Time        Source                Destination           Protocol Info
     42 2.831028    84.42.128.227         147.32.244.18         TCP      6000 > 56699 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460 WS=0 TSV=0 TSER=0

Frame 42 (78 bytes on wire, 78 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: ArrisInt_b9:30:6a (00:00:ca:b9:30:6a)
Internet Protocol, Src: 84.42.128.227 (84.42.128.227), Dst: 147.32.244.18 (147.32.244.18)
Transmission Control Protocol, Src Port: 6000 (6000), Dst Port: 56699 (56699), Seq: 0, Ack: 1, Len: 0

Ethereal s routerem:

No.     Time        Source                Destination           Protocol Info
      1 0.000000    192.168.1.100         147.32.244.18         XDMCP    Query

Frame 1 (49 bytes on wire, 49 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: Cisco-Li_8c:bd:4e (00:18:39:8c:bd:4e)
Internet Protocol, Src: 192.168.1.100 (192.168.1.100), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2920 (2920), Dst Port: 177 (177)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
      2 0.044622    147.32.244.18         192.168.1.100         XDMCP    Willing

Frame 2 (93 bytes on wire, 93 bytes captured)
Ethernet II, Src: Cisco-Li_8c:bd:4e (00:18:39:8c:bd:4e), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 192.168.1.100 (192.168.1.100)
User Datagram Protocol, Src Port: 177 (177), Dst Port: 2920 (2920)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
      3 1.005206    192.168.1.100         147.32.244.18         XDMCP    Request

Frame 3 (145 bytes on wire, 145 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: Cisco-Li_8c:bd:4e (00:18:39:8c:bd:4e)
Internet Protocol, Src: 192.168.1.100 (192.168.1.100), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2920 (2920), Dst Port: 177 (177)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
      4 1.012861    147.32.244.18         192.168.1.100         XDMCP    Accept 

Frame 4 (94 bytes on wire, 94 bytes captured)
Ethernet II, Src: Cisco-Li_8c:bd:4e (00:18:39:8c:bd:4e), Dst: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8)
Internet Protocol, Src: 147.32.244.18 (147.32.244.18), Dst: 192.168.1.100 (192.168.1.100)
User Datagram Protocol, Src Port: 177 (177), Dst Port: 2920 (2920)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
      5 1.013549    192.168.1.100         147.32.244.18         XDMCP    Manage

Frame 5 (71 bytes on wire, 71 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: Cisco-Li_8c:bd:4e (00:18:39:8c:bd:4e)
Internet Protocol, Src: 192.168.1.100 (192.168.1.100), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2920 (2920), Dst Port: 177 (177)
X Display Manager Control Protocol

No.     Time        Source                Destination           Protocol Info
      6 3.122784    192.168.1.100         147.32.244.18         XDMCP    Manage

Frame 6 (71 bytes on wire, 71 bytes captured)
Ethernet II, Src: Giga-Byt_23:5b:a8 (00:0d:61:23:5b:a8), Dst: Cisco-Li_8c:bd:4e (00:18:39:8c:bd:4e)
Internet Protocol, Src: 192.168.1.100 (192.168.1.100), Dst: 147.32.244.18 (147.32.244.18)
User Datagram Protocol, Src Port: 2920 (2920), Dst Port: 177 (177)
X Display Manager Control Protocol

V prvním přepadě jsou vynechány rámce ARP (ve druhém případě ke mě ani nedojdou, protože odpověď zná router). Jinak se jedná o kompletní výpis hlaviček paketů.
Děkuji za odpovědi. Jakub Kocourek

Odpovědi

[Zdeněk Štěpánek]

Tu zmet znaku jsem tedy opravdu nelustil...

Na routeru netreba nic nastavovat, me to fungovalo skrze router zcela bez problemu a ani neni duvod aby to nefungovalo.

Nejspis to ale neni jen router, ale je tam i nejakej firewall nebo nedejboze maskarada. Vypni oboje a pojede to.

Zdenek

[Jack]

To bohužel nepomáhá. A ten server, na který se připojuji je dostupný z internetu, takže přes router se nějak dostat musím (za předpokladu, že skutečně sestavuje příchozí spoj). Navíc, NAT tam běžet musí, bez něj se do internetu těžko všechna PC dostanou.
Jakub Kocourek