Ed ecco la risposta definitiva: È la MALEDETTISSIMA Vodafone Station.
Con un router "normale" il problema non si pone affatto, con la VS i pacchetti non vengono recapitati.
Allego il PCAP di un pacchetto che non arriva.
No. Time Source Destination Protocol Length Info
47 0.915622 192.168.20.1 192.168.20.20 ICMP 72 Destination unreachable (Port unreachable)
Frame 47: 72 bytes on wire (576 bits), 72 bytes captured (576 bits)
Encapsulation type: Ethernet (1)
Arrival Time: Feb 3, 2023 19:51:06.202785000 ora solare Europa occidentale
[Time shift for this packet: 0.000000000 seconds]
Epoch Time: 1675450266.202785000 seconds
[Time delta from previous captured frame: 0.000268000 seconds]
[Time delta from previous displayed frame: 0.000268000 seconds]
[Time since reference or first frame: 0.915622000 seconds]
Frame Number: 47
Frame Length: 72 bytes (576 bits)
Capture Length: 72 bytes (576 bits)
[Frame is marked: False]
[Frame is ignored: False]
[Protocols in frame: eth:ethertype:ip:icmp:ip:udp:portcontrol]
[Coloring Rule Name: ICMP errors]
[Coloring Rule String: icmp.type in { 3..5, 11 } || icmpv6.type in { 1..4 }]
Ethernet II, Src: Vodafone_XX:XX:XX (80:16:05:XX:XX:XX), Dst: Giga-Byt_XX:XX:XX (18:c0:4d:XX:XX:XX)
Destination: Giga-Byt_XX:XX:XX (18:c0:4d:XX:XX:XX)
Address: Giga-Byt_XX:XX:XX (18:c0:4d:XX:XX:XX)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Source: Vodafone_XX:XX:XX (80:16:05:XX:XX:XX)
Address: Vodafone_XX:XX:XX (80:16:05:XX:XX:XX)
.... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
.... ...0 .... .... .... .... = IG bit: Individual address (unicast)
Type: IPv4 (0x0800)
Internet Protocol Version 4, Src: 192.168.20.1, Dst: 192.168.20.20
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0xc0 (DSCP: CS6, ECN: Not-ECT)
1100 00.. = Differentiated Services Codepoint: Class Selector 6 (48)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 58
Identification: 0xa5ff (42495)
000. .... = Flags: 0x0
0... .... = Reserved bit: Not set
.0.. .... = Don't fragment: Not set
..0. .... = More fragments: Not set
...0 0000 0000 0000 = Fragment Offset: 0
Time to Live: 64
Protocol: ICMP (1)
Header Checksum: 0x2a9e [validation disabled]
[Header checksum status: Unverified]
Source Address: 192.168.20.1
Destination Address: 192.168.20.20
Internet Control Message Protocol
Type: 3 (Destination unreachable)
Code: 3 (Port unreachable)
Checksum: 0xa67e [correct]
[Checksum Status: Good]
Unused: 00000000
Internet Protocol Version 4, Src: 192.168.20.20, Dst: 192.168.20.1
0100 .... = Version: 4
.... 0101 = Header Length: 20 bytes (5)
Differentiated Services Field: 0x00 (DSCP: CS0, ECN: Not-ECT)
0000 00.. = Differentiated Services Codepoint: Default (0)
.... ..00 = Explicit Congestion Notification: Not ECN-Capable Transport (0)
Total Length: 30
Identification: 0xfc09 (64521)
000. .... = Flags: 0x0
0... .... = Reserved bit: Not set
.0.. .... = Don't fragment: Not set
..0. .... = More fragments: Not set
...0 0000 0000 0000 = Fragment Offset: 0
Time to Live: 128
Protocol: UDP (17)
Header Checksum: 0x955f [validation disabled]
[Header checksum status: Unverified]
Source Address: 192.168.20.20
Destination Address: 192.168.20.1
User Datagram Protocol, Src Port: 61619, Dst Port: 5351
Source Port: 61619
Destination Port: 5351
Length: 10
Checksum: 0x50d9 [unverified]
[Checksum Status: Unverified]
[Stream index: 1]
UDP payload (2 bytes)
NAT Port Mapping Protocol, External Address Request
Version: 0
Opcode: External Address Request (0)
P.S. Qualcun altro con VS può fare una prova simile per capire se è la mia e riesco a farmela cambiare o se è un problema del firmware della VS?
Grazie
Luca
