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2019-12-25 22:29:36 +0000 received badge  Popular Question (source)
2019-11-27 08:04:50 +0000 commented answer SIP register timeout

You are completely right, the capture on the PBX side is incomplete. My fault. I will wait until the problem rises again

2019-11-26 14:41:04 +0000 edited question SIP register timeout

SIP register timeout Hi all, I have a fax server running on a Windows Server 2019 machine. The fax server communicates

2019-11-26 14:38:36 +0000 commented answer SIP register timeout

Maybe my first comment was a bit unclear, sorry for that :-) I see a successful registration at 13:46:45 (Packet no. 88-

2019-11-24 18:03:08 +0000 received badge  Commentator
2019-11-24 18:03:08 +0000 commented answer SIP register timeout

The TLS connections don't come from the fax server. On the 192.168.73.150 trace, packet no. 34 is a ping reply so I am n

2019-11-23 13:28:38 +0000 edited question SIP register timeout

SIP register timeout Hi all, I have a fax server running on a Windows Server 2019 machine. The fax server communicates

2019-11-23 13:28:13 +0000 asked a question SIP register timeout

SIP register timeout Hi all, I have a fax server running on a Windows Server 2019 machine. The fax server communicates

2019-09-02 08:44:46 +0000 commented answer Problems sending Fax via IP phone

I recorded a fax sending process on the gateway (see Capture Router/Gateway in the main question). There is almost no pa

2019-09-02 08:42:41 +0000 commented answer Problems sending Fax via IP phone

I recorded a capture on the gateway (see Capture Router/Gateway in the main question). There is almost no packet loss bu

2019-09-02 08:14:02 +0000 commented answer Problems sending Fax via IP phone

I recorded a capture on the gateway (see Capture Router/Gateway in the main question). There is almost no packet loss bu

2019-09-02 08:10:47 +0000 edited question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-09-02 08:06:11 +0000 edited question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-09-02 07:47:57 +0000 edited question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-08-26 07:42:38 +0000 commented answer Problems sending Fax via IP phone

@SYN-bit: please see my edits regarding the RTP stream.

2019-08-26 07:41:49 +0000 edited question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-08-26 07:41:10 +0000 commented answer Problems sending Fax via IP phone

I'm not quite sure how to figure out the RTP statistics. In RTP stream View, I see two entries between 192.168.73.150 an

2019-08-26 07:35:27 +0000 commented answer Problems sending Fax via IP phone

Yes, the subnet is 192.168.73.x for both. I checked the subnetmask, it's set to 255.255.255.0 so it's OK.

2019-08-26 07:25:29 +0000 commented question Problems sending Fax via IP phone

@Spooky Please see my edits.

2019-08-26 07:25:10 +0000 edited question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-08-22 10:05:04 +0000 edited question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-08-21 19:08:03 +0000 asked a question Problems sending Fax via IP phone

Problems sending Fax via IP phone Hello, we are using a fax software which sends and receives faxes by encapsulating th

2019-08-20 07:11:34 +0000 marked best answer Ping failure in VPN network

Hello,

I have troubles connecting to a VPN network via IPSec.

The VPN is provided by the router in the remote network using DynDNS.

The connection is established succesfully (using Shrew Soft Client) I cannot connect to any device in the remote network. Even ping to the router fails.

You find the capture here: https://1drv.ms/u/s!AphLkdj_V9pOpidrc...

I see some TCP Retransmission pakets but I am not that familiar in reading captures.

Does the capture give any hints in what may be the problem?

2019-08-20 07:11:31 +0000 commented answer Ping failure in VPN network

OK thanks. I will check the router. Strange thing is that this behaviour only occurs sometimes. Often it simply works.

2019-08-16 09:05:51 +0000 edited question Ping failure in VPN network

Ping failure in VPN network Hello, I have troubles connecting to a VPN network via IPSec. The VPN is provided by the r

2019-08-16 09:01:00 +0000 asked a question Ping failure in VPN network

Ping failure in VPN network Hello, I have troubles connecting to a VPN network via IPSec. The VPN is provided by the r

2019-05-19 19:46:05 +0000 answered a question SMB Transfer Upload fast, Download slow

After all it seems the CAT6 ethernet cable (which is brand new) was the cause. After unplugging it and plugging again, t

2019-05-19 19:29:01 +0000 marked best answer SMB Transfer Upload fast, Download slow

I have problems within my local network.

I have a Windows Server 2019 with some shares (no Active Directory). Clients are all Windows (mostly Windows 10). No virtualization is being used.

Uploading files to the share is pretty fast, about 60 MByte/sec. But downloading files from the share is extremely slow, between 1-4 MBytes/sec. These results come from a wifi connection but are similar using an ethernet connection. So it is not a wifi problem.

You find the captured results here: Download: https://1drv.ms/u/s!AphLkdj_V9pOpTL2D... Upload: https://1drv.ms/u/s!AphLkdj_V9pOpTHs9...

I noticed quite a lot TCP Dup Ack, Out-Of-Order and Retransmission packets.

Turning off Windows Defender and Firewall on the client did not change anything.

Using iperf, i measured the bandwith between client and server:

  • Download: 20 Mbit/sec
  • Upload: 1 Gbit/sec (ethernet), 300 Mbit/sec (wifi)

So it seems not to be an SMB problem.

Does anybody has an idea what the reason could be or how I could investigate further?

EDIT: Network topology between Client and Server:

  1. Client (wifi)
  2. Router
  3. Switch 1
  4. Switch 2
  5. Server
2019-05-19 19:29:01 +0000 received badge  Scholar (source)
2019-05-19 19:28:56 +0000 commented answer SMB Transfer Upload fast, Download slow

Damn, it seems the ethernet cable was the cause. After unplugging it and plugging it again upload AND download speed is

2019-05-19 12:43:56 +0000 commented answer SMB Transfer Upload fast, Download slow

Thanks. It's weird that packet loss only occurs in one direction (download) whereas upload is pretty fast. Do you have a

2019-05-17 12:31:29 +0000 commented question SMB Transfer Upload fast, Download slow

Not sure how to capture TCP handshake. Followed this description: https://osqa-ask.wireshark.org/questions/230/displayin

2019-05-17 12:31:06 +0000 commented question SMB Transfer Upload fast, Download slow

Not sure how to capture TCP handshake. Followed this description: https://osqa-ask.wireshark.org/questions/230/displayin

2019-05-17 12:29:56 +0000 edited question SMB Transfer Upload fast, Download slow

SMB Transfer Upload fast, Download slow I have problems within my local network. I have a Windows Server 2019 with som

2019-05-17 10:26:30 +0000 edited question SMB Transfer Upload fast, Download slow

SMB Transfer Upload fast, Download slow I have problems within my local network. I have a Windows Server 2019 with som

2019-05-17 10:26:15 +0000 received badge  Editor (source)
2019-05-17 10:26:15 +0000 edited question SMB Transfer Upload fast, Download slow

SMB Transfer Upload fast, Download slow I have problems within my local network. I have a Windows Server 2019 with som

2019-05-17 10:20:42 +0000 asked a question SMB Transfer Upload fast, Download slow

SMB Transfer Upload fast, Download slow I have problems within my local network. I have a Windows Server 2019 with som