Socket connection to LAN computer fails?_问答_开发者

PC1 and PC2 are connected with a switch.

PC1--<-->--SWITCH--<-->--PC2

Both have Windows 7 installed.

PC1 has it's firewall on.

PC2 has it's firewall off.

They can share files.

They can remote desktop each other.

There is a HttpListener on PC2 on port 80 but it is not possible to connect from PC1 to PC2 on port 80.

What could be the problem?

PC1 Network Info:

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   Link-local IPv6 Address . . . . . : fe80::5948:69a8:d29e:6bfe%11
   Autoconfiguration IPv4 Address. . : 169.254.107.254
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . :

PC2 Network Info:

Ethernet adapter Local Area Connection:

   Connection-specific DNS Suffix  . :
   Link-local IPv6 Address . . . . . : fe80::5cd8:ed4e:8848:569%11
   Autoconfiguration IPv4 Address. . : 169.254.5.105
   Subnet Mask . . . . . . . . . . . : 255.255.0.0
   Default Gateway . . . . . . . . . :

telnet pc2 80, from PC1 says:

Could not open connection to the host, on port 80: Connect failed.

"netstat -anb" on PC2:

Active Connections

开发者_Python百科  Proto  Local Address          Foreign Address        State
  TCP    0.0.0.0:80             0.0.0.0:0              LISTENING
 Can not obtain ownership information
  TCP    0.0.0.0:135            0.0.0.0:0              LISTENING
  RpcSs
 [svchost.exe]
  TCP    0.0.0.0:445            0.0.0.0:0              LISTENING
 Can not obtain ownership information
  TCP    0.0.0.0:554            0.0.0.0:0              LISTENING
 [wmpnetwk.exe]
  TCP    0.0.0.0:2869           0.0.0.0:0              LISTENING
 Can not obtain ownership information
  TCP    0.0.0.0:5357           0.0.0.0:0              LISTENING
 Can not obtain ownership information
  TCP    0.0.0.0:10243          0.0.0.0:0              LISTENING
 Can not obtain ownership information
  TCP    0.0.0.0:49152          0.0.0.0:0              LISTENING
 [wininit.exe]
  TCP    0.0.0.0:49153          0.0.0.0:0              LISTENING
  eventlog
 [svchost.exe]
  TCP    0.0.0.0:49154          0.0.0.0:0              LISTENING
  Schedule
 [svchost.exe]
  TCP    0.0.0.0:49155          0.0.0.0:0              LISTENING
 [services.exe]
  TCP    0.0.0.0:49156          0.0.0.0:0              LISTENING
 [lsass.exe]
  TCP    169.254.5.105:139      0.0.0.0:0              LISTENING
 Can not obtain ownership information
  TCP    [::]:80                [::]:0                 LISTENING
 Can not obtain ownership information
  TCP    [::]:135               [::]:0                 LISTENING
  RpcSs
 [svchost.exe]
  TCP    [::]:445               [::]:0                 LISTENING
 Can not obtain ownership information
  TCP    [::]:554               [::]:0                 LISTENING
 [wmpnetwk.exe]
  TCP    [::]:2869              [::]:0                 LISTENING
 Can not obtain ownership information
  TCP    [::]:3587              [::]:0                 LISTENING
  p2pimsvc
 [svchost.exe]
  TCP    [::]:5357              [::]:0                 LISTENING
 Can not obtain ownership information
  TCP    [::]:10243             [::]:0                 LISTENING
 Can not obtain ownership information
  TCP    [::]:49152             [::]:0                 LISTENING
 [wininit.exe]
  TCP    [::]:49153             [::]:0                 LISTENING
  eventlog
 [svchost.exe]
  TCP    [::]:49154             [::]:0                 LISTENING
  Schedule
 [svchost.exe]
  TCP    [::]:49155             [::]:0                 LISTENING
 [services.exe]
  TCP    [::]:49156             [::]:0                 LISTENING
 [lsass.exe]
  TCP    [fe80::5cd8:ed4e:8848:569%11]:445  [fe80::5948:69a8:d29e:6bfe%11]:49569  ESTABLISHED
 Can not obtain ownership information
  UDP    0.0.0.0:68             *:*                    
  Dhcp
 [svchost.exe]
  UDP    0.0.0.0:123            *:*                    
  W32Time
 [svchost.exe]
  UDP    0.0.0.0:3702           *:*                    
  EventSystem
 [svchost.exe]
  UDP    0.0.0.0:3702           *:*                    
  FDResPub
 [svchost.exe]
  UDP    0.0.0.0:3702           *:*                    
  FDResPub
 [svchost.exe]
  UDP    0.0.0.0:3702           *:*                    
  EventSystem
 [svchost.exe]
  UDP    0.0.0.0:5004           *:*                    
 [wmpnetwk.exe]
  UDP    0.0.0.0:5005           *:*                    
 [wmpnetwk.exe]
  UDP    0.0.0.0:5355           *:*                    
  Dnscache
 [svchost.exe]
  UDP    0.0.0.0:56904          *:*                    
  FDResPub
 [svchost.exe]
  UDP    0.0.0.0:56906          *:*                    
  EventSystem
 [svchost.exe]
  UDP    0.0.0.0:65438          *:*                    
  EventSystem
 [svchost.exe]
  UDP    127.0.0.1:1900         *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    127.0.0.1:56903        *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    169.254.5.105:137      *:*                    
 Can not obtain ownership information
  UDP    169.254.5.105:138      *:*                    
 Can not obtain ownership information
  UDP    169.254.5.105:1900     *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    169.254.5.105:56902    *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    [::]:123               *:*                    
  W32Time
 [svchost.exe]
  UDP    [::]:3540              *:*                    
  p2pimsvc
 [svchost.exe]
  UDP    [::]:3702              *:*                    
  FDResPub
 [svchost.exe]
  UDP    [::]:3702              *:*                    
  EventSystem
 [svchost.exe]
  UDP    [::]:3702              *:*                    
  FDResPub
 [svchost.exe]
  UDP    [::]:3702              *:*                    
  EventSystem
 [svchost.exe]
  UDP    [::]:5004              *:*                    
 [wmpnetwk.exe]
  UDP    [::]:5005              *:*                    
 [wmpnetwk.exe]
  UDP    [::]:5355              *:*                    
  Dnscache
 [svchost.exe]
  UDP    [::]:56905             *:*                    
  FDResPub
 [svchost.exe]
  UDP    [::]:56907             *:*                    
  EventSystem
 [svchost.exe]
  UDP    [::]:65439             *:*                    
  EventSystem
 [svchost.exe]
  UDP    [::1]:1900             *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    [::1]:56901            *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    [fe80::5cd8:ed4e:8848:569%11]:546  *:*                    
  Dhcp
 [svchost.exe]
  UDP    [fe80::5cd8:ed4e:8848:569%11]:1900  *:*                    
  SSDPSRV
 [svchost.exe]
  UDP    [fe80::5cd8:ed4e:8848:569%11]:56900  *:*                    
  SSDPSRV
 [svchost.exe]

EDIT1 - Some Wireshark report (telnet pc2 80):

62  28.544466   169.254.5.105   169.254.107.254 NBSS    126 Session request, to PC1<20> from PC2<00>
63  28.544538   169.254.107.254 169.254.5.105   NBSS    58  Positive session response
64  28.544761   169.254.5.105   169.254.107.254 SMB 213 Negotiate Protocol Request
65  28.545154   169.254.107.254 169.254.5.105   SMB2    228 NegotiateProtocol Response
66  28.545359   169.254.5.105   169.254.107.254 SMB2    162 NegotiateProtocol Request
67  28.545527   169.254.107.254 169.254.5.105   SMB2    228 NegotiateProtocol Response
68  28.546260   169.254.5.105   169.254.107.254 SMB2    220 SessionSetup Request, NTLMSSP_NEGOTIATE
69  28.546416   169.254.107.254 169.254.5.105   SMB2    339 SessionSetup Response, Error: STATUS_MORE_PROCESSING_REQUIRED, NTLMSSP_CHALLENGE
70  28.546836   169.254.5.105   169.254.107.254 SMB2    294 SessionSetup Request, NTLMSSP_AUTH, User: \, Unknown message type
71  28.547306   169.254.107.254 169.254.5.105   SMB2    159 SessionSetup Response, Unknown message type
72  28.547646   169.254.5.105   169.254.107.254 SMB2    162 TreeConnect Request Tree: \\PC1\IPC$
73  28.547723   169.254.107.254 169.254.5.105   SMB2    138 TreeConnect Response

EDIT2 - Wireshark, Follow TCP Stream:

12  2.197774    fe80::5948:69a8:d29e:6bfe   fe80::5cd8:ed4e:8848:569    TCP 86  50243 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1440 WS=256 SACK_PERM=1
14  5.197056    fe80::5948:69a8:d29e:6bfe   fe80::5cd8:ed4e:8848:569    TCP 86  50243 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1440 WS=256 SACK_PERM=1
19  11.197398   fe80::5948:69a8:d29e:6bfe   fe80::5cd8:ed4e:8848:569    TCP 82  50243 > http [SYN] Seq=0 Win=8192 Len=0 MSS=1440 SACK_PERM=1

SORRY GUYS: The firewall was not completely disabled for private network only public network, i checked again and found out.. Now everything works. Thank you.

This is a firewall problem, try to set every firewall including your switch open.

If that solves it, this is no longer a Stack Overflow problem...