Hi Team,
Kindly help me to block sslv3 in FortiOS 5.
Regards / Ramesh M
Ramesh M Technical Specialist - CCNA(Security), FCNSP, ACE, ASE, ITIL blogs.itzecuriry.in
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There's different places where SSLv3 can be turned on / off on the Fortigate. The biggest one is in the gui:
config system global
set strong-crypto enable
end
But there's some other places as well, all references are on the fortiguard page here: http://www.fortiguard.com...POODLE--Vulnerability/
Hello,
You maybe want to disable it for vpn access as well:
config vpn ssl settings set sslv3 disable
I disabled sslv3 for SSL VPN and now FortiClient will not connect. If I enable it FortiClient connects without a problem.
How do I force FortiClient to not use sslv3?
Thanks!
Hello, you can set tls enabled. LIke this:
config vpn ssl settings set sslvpn-enable enable set sslv3 disable set tlsv1-0 disable set tlsv1-1 enable set tlsv1-2 enable
Grtz. Ralph
This is how I have it configured, but FortiClient does not connect. Is there a way to force FortiClient to use TLS?
Change_Me # get vpn ssl set
sslvpn-enable : enable
sslv3 : disable
tlsv1-0 : enable
tlsv1-1 : enable
tlsv1-2 : enable
Hello,
This the full config I configured for one of our customers, see below.
Note, when you type config vpn ssl settings and then type sh full, you will see all settings of the section
Note2, they use forticlient 4.0.2308
config vpn ssl settings set sslvpn-enable enable set sslv3 disable set tlsv1-0 disable set tlsv1-1 enable set tlsv1-2 enable set dns-server1 10.101.100.53 set dns-server2 10.101.100.54 set route-source-interface disable set reqclientcert disable set sslv2 disable set allow-ssl-big-buffer disable set allow-ssl-insert-empty-fragment enable set allow-ssl-client-renegotiation disable set force-two-factor-auth disable set force-utf8-login disable set servercert "Fortinet_CA_SSLProxy" set algorithm default set idle-timeout 300 set auth-timeout 28800 set tunnel-ip-pools "sslvpn-pool_192.168.200.0" set dns-suffix '' set wins-server1 0.0.0.0
I have the identical settings for SSL VPN on the FortiGate except for DNS server IPs of course.
I'm using FortiClient 5.2.3.0633. I can't figure out how to force this version to negotiate TLS 1.x.
Here's the output from an SSLVPN debug I ran yesterday while attempting to VPN in.
2015-03-16 19:46:34 [3957:root]SSL state:before/accept initialization (172.16.5.82)
2015-03-16 19:46:34 [3957:root]SSL state:SSLv2/v3 read client hello A:(null)(172.16.5.82)
2015-03-16 19:46:34 [3957:root]SSL_accept failed, 1:unknown protocol
2015-03-16 19:46:34 [3957:root]Destroy sconn 0x3106a600, connSize=0.
Hello Paul,
I just tested it with 5.2 version of Forticlient and I can't get through either :(
I don't know whether you can force Forticlient to use a specific protocol.
Besides, I have also configured it (to use tls , thus not ssl) on Fortigates that run on 5.2 and there I can connect with the 5.2 client...
I had a similar problem resolved as follows in the windows client stations: 1) have identified that access the link https: // <ip-address>: 10443 was not operating in Internet Explorer. But the test in Firefox worked; 2) Once checked in the advanced settings for Internet Explorer and activated the option to use TLS 1.2; 3) Performed the test again in connection with the SSLVPN client and started to work. Hope this helps.
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