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09-04-2020
11Posts
0Likes
1Solution
Sep 04, 2020Last Visited
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Latest posts by sharam
| Subject | Views | Posted |
|---|---|---|
| 3291 | 09-04-2020 09:28 AM | |
| 2680 | 07-06-2020 02:13 PM | |
| 2709 | 07-06-2020 01:53 PM | |
| 2782 | 07-06-2020 01:18 PM | |
| 2794 | 07-06-2020 12:46 PM |
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| Member Since | 06-29-2020 09:37 AM |
| Date Last Visited | 09-04-2020 05:22 PM |
| Posts | 11 |
09-04-2020
09:28 AM
Thanks to all who responded. I was finally able to resolve this problem by by changing zone protection for Untrust from SYN Cookies to Random Early Drop.
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07-06-2020
02:13 PM
Those are already pretty high. Alarm and active reates are 59,000. Maximum connections at 100,000.
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07-06-2020
01:53 PM
I have increased the threshold from 100 to 500 under Reconnaissance per your suggestion. Will see if that makes a difference.
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07-06-2020
01:18 PM
Thanks @fhewiufhwefhwe but the problem we are facing is that when the TCP outage occurs our thousands of user who are scattered across the Internet world are not able to reach our websites or mail servers. We don't want the firewall to block the whole Internet. I should also point out if the subject is not clear that the problem is only with incoming TCP traffic. Outgoing traffic is not affected.
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07-06-2020
12:46 PM
We don't have this problem with UDP which is what DNS uses.
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07-06-2020
12:35 PM
@fhewiufhwefhwe there are no entries under Objects -> Security Profiles -> Dos Protection, not even default.
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07-06-2020
12:07 PM
Can you please be more specific? Zone Pro is the first place we looked and changed various config to no effect.
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07-06-2020
11:52 AM
Thank you for your response @Brandon_Wertz . This is the main entry of an event that just happened today:
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07-06-2020
08:03 AM
What I am seeing in logs related to the outage is: But I am not able to see which rulebase this it related to.
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07-01-2020
01:20 PM
There are no entries under Policy -> DoS Protection. Is there another location I can look?
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07-01-2020
07:46 AM
At random times all TCP connections from the Internet are blocked (all ports and all IPs) for incoming traffic only. Websites, mail servers etc are not accessible from the Internet. UDP and ICMP are not affected. What could be causing this?
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