Hi,
I have problems with IPS in UTM, the UTM handles IPSEC traffic with VEEAM backup and Replication, and triggers this:
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Hi,
I have problems with IPS in UTM, the UTM handles IPSEC traffic with VEEAM backup and Replication, and triggers this:
Hi Martin,
very interesting. do you know if that concerned only IPS exception or maybe tcp/udp syn flood exception also?
greets
zaphod
___________________________________________
Home: Zotac CI321 (8GB RAM / 120GB SSD) with latest Sophos UTM
Work: 2 SG430 Cluster / many other models like SG105/SG115/SG135/SG135w/...
Hey guys,
before I create a new Topic I will add my question here because it should fit.
We have the same issue what seems a bit weird. The configuration is for me really easy to understand but it doesnt work.
Our example:
2020:05:13-10:55:36 sophos-1 ulogd[29081]: id="2105" severity="info" sys="SecureNet" sub="ips" name="UDP flood detected" action="UDP flood" fwrule="60013" initf="eth1" srcmac="Extern MAC" dstmac="Our MAC" srcip="Extern Public IP" dstip="Our Public IP" proto="17" length="132" tos="0x00" prec="0x00" ttl="59" srcport="691" dstport="27270"
In Short:
[...]name="UDP flood detected" [...] srcip="Extern Public IP" dstip="Our Public IP" [..] srcport="691" dstport="27270"
So for my understanding I have to set a rule like:
--------------------------------------------------------------------------------------------
Action -> Skip UDP Flood Protection
Coming from these source... -> Extern Public IP
AND
Going to these destination... -> Our Public IP (Tried without this, too)
AND
Using these services -> 691
---------------------------------------------------------------------------------------------
For my understanding it's exaclty what the IPS is tend to block. But it doesnt seems to be better.
When I now add the "destination port" 27270, it start to work. But the problem is, that in some cases the destination port can vary.
Is that behaviour correctly "by design" that it only works while adding source "and" destination ports?
Thanks.
Flo
Hallo Flo,
It look like you need a single, new Service definition like msexch-routing response = UDP 691->1:65535.
Did that work for you?
Cheers - Bob
Hey Bob,
I believe I never noticed the exatly description of the single entries in a service defination because "source port" is always fixed in a new Definition to "1:65535". So I dont cared about it cause it works. -.-'
Do you mean (yeah I know its what the logging is saying after you gave me the hint xD) when I switch both entries, it should work?
Hey Martin,
from which log files is that error?
"A Network Trojan was Detected" isnt that kind of warning which you should ignore and easly add an exception for it. =/
Sometimes it can help to restart the IPS module cause some exceptions only will be used after the affected for new connections I believe.
Greetings,
Flo
Hi Flo,
From IPS log:
"sub="ips"
Triggerede ADv. protection alerts
-----
Best regards
Martin
Sophos XGS 2100 @ Home | Sophos v19 Architect