Jump to content

DoS protection: Not accepting more calls


Ganesh
 Share

Recommended Posts

Hi,

 

Our customer is using snomONE version 4.2.0.3958 (Linux)and everthing was working fine. Today they are unable to call between the extensions. The snom phone displays the message as "Temporarily unavailable". In the PBX logs we see "DoS protection: Not accepting more calls"

 

Let me know how we can fix this problem. We are using version 4.2.0.3958 (Linux.

 

Regards

Ganesh

Link to comment
Share on other sites

Well, that means that there are too many calls within a short time. You can increase the value of max_udp_invite or use TCP for SIP.

 

Thanks. Let me know how we can increase this value (max_udp_invite). Is this value in the snomONE configuration settings?

 

Regards,

Ganesh

Link to comment
Share on other sites

  • 2 years later...

The max_udp_invite setting is limiting how many requests the system accepts per second on UDP transport layer. This is simply about situations when the system gets flooded with INVITE requests.

 

There are other settings how many calls you can have per system, or domain and even per extension. The log should show you why ca call gets rejected.

Link to comment
Share on other sites

For the record: as the PBX was up for ~9 months, I simple restarted it. This cleared the issue.

 

The log was not really helpful in this case, see:

[8] 20140722141631: HTTP/NTP/SNMP client waited for 60 s
[5] 20140722141657: Identify trunk (IP address/port and domain match) 4
[5] 20140722141837: Last message repeated 4 times
[3] 20140722141837: DoS protection: Not accepting more calls
[5] 20140722141857: Identify trunk (IP address/port and domain match) 4
[8] 20140722141927: Trunk 4: Preparing for re-registration
[8] 20140722141927: Trunk xxx: Sending registration to xxx.xx
[8] 20140722141927: Answer challenge with username xxx
[8] 20140722141927: Trunk 4: setup callback to send re-registration after 240 seconds
[5] 20140722141927: Identify trunk (IP address/port and domain match) 4

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...