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
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…