Hello,
I tried to summarize in the title, and so far I have been able to
associate the teardown of Windows 10 data stream with a simultaneous
IKEv2 connection that came during the test signal (live TV stream) from
an Android tablet on our test Linux server.
The Windows laptop had no realtime stream and neither DNS resolution. I
did not check ping, but I suspect it wouldn't pass either by the symptoms.
This time I compiled without the USE_DH2=true and used it with
ms-dh-downgrade=true.
conn MYCONN-ikev2-cp
# The server's actual IP goes here - not elastic IPs
left=161.53.235.3
leftcert=vpn.alu.hr
[email protected]
leftsendcert=always
leftsubnet=0.0.0.0/0
leftrsasigkey=%cert
# Clients
right=%any
# your addresspool to use - you might need NAT rules if
providing full internet to clients
rightaddresspool=192.168.101.10-192.168.101.253
# optional rightid with restrictions
rightid="O=ALU-UNIZG,CN=win7client.alu.hr"
rightca=%same
rightrsasigkey=%cert
#
# connection configuration
# DNS servers for clients to use
modecfgdns=8.8.8.8,192.168.100.1
# Versions up to 3.22 used modecfgdns1 and modecfgdns2
#modecfgdns1=8.8.8.8
#modecfgdns2=193.110.157.123
narrowing=yes
# recommended dpd/liveness to cleanup vanished clients
dpddelay=30
dpdtimeout=120
dpdaction=clear
auto=add
ikev2=insist
rekey=no
esp=aes_gcm256,aes_gcm128,aes256-sha2_512,aes128-sha2_512,aes256-sha1,aes128-sha1
#
esp=aes_gcm256-null,aes_gcm128-null,aes256-sha2_512,aes128-sha2_512,aes256-sha1,aes128-sha1,aes_gcm256-null;modp1024
# ikev2 fragmentation support requires libreswan 3.14 or newer
fragmentation=yes
# optional PAM username verification (eg to implement bandwidth
quota
# pam-authorize=yes
ms-dh-downgrade=yes
authby=rsa-sha1
Both the `ipsec showstates` and Windows 10 did not reflect that the data
stream was interrupted, and eithe had Android.
Here is the session log 1 and log2.
The interesting part is probably close to the end of both logs.
[1] https://domac.alu.hr/mtodorov/ikev2-20220113-01.log
[2] https://domac.alu.hr/mtodorov/ikev2-20220113-02.log
I will supply more information as I am testing. I wonder if this is
related to removal of USE_DH2=true from the compilation or will the
connection be stable unless there is an interference from another
(Android) client. The Android had also lost connectivity, though the
wizard said "Connected".
Hope this helps. I would have to revert to 4.5 and USE_DH2=true and I
don't think it would be prudent to move it to the production VPN until
we resolve such issues :-/
The accountant guy would think I'm incompetent if his VPN connection
breaks in the middle of accounting salaries :-(
Any idea?
Kind regards,
Mirsad
--
Mirsad Goran Todorovac
CARNet sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu
--
CARNet system engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb, Republic of Croatia
tel. +385 (0)1 3711 451
mob. +385 91 57 88 355
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