VoIP communication problems over SD-WAN and IPsec-Interfaces

Can you verify, you have the SD-WAN System generated Switch enabled? https://docs.sophos.com/nsg/sophos-firewall/18.5/Help/en-us/webhelp/onlinehelp/AdministratorHelp/Routing/SDWANPolicyRouting/index.html#how-to-configure-application-based-routing

set routing sd-wan-policy-route system-generate-traffic enable

I am not sure, but could be caused by the traffic is redirected as System Generated due the SIP helper. 

For Radius this is for sure the issue. But SIP/VOIP i am not sure. 

thank you for idea.

but it was already enabled.

If you change the Source to ANY and only using the Destination, does the SD-WAN Rule be applied for VOIP? 

was already set to any.

So it is actually the same rule like static? That is odd. If you use conntrack -E and check for the connection, you should see the SD-WAN PBR applied. 

Sophos22 said:

but it was already enabled

Sophos22 said:

was already set to any

same here

LuCar Toni said:

Can you verify, you have the SD-WAN System generated Switch enabled? 

console> show routing sd-wan-policy-route reply-packet
SD-WAN policy route is turned on for reply packets.
console> show routing sd-wan-policy-route system-generate-traffic
SD-WAN policy route is turned on for system-generated traffic.
console>

LuCar Toni said:

use conntrack -E and check for the connection

what do you mean? is it a console command? If so i do not find it. 

Every Connection in Conntrack reflects the SD-WAN, even if it is not applied.

[UPDATE] proto=tcp proto-no=6 timeout=10 state=CLOSE orig-src=172.25.235.10 orig-dst=192.168.1.5 orig-sport=57196 orig-dport=389 reply-src=192.168.1.5 reply-dst=172.25.235.10 reply-sport=389 reply-dport=57196 [ASSURED] id=3138929965 masterid=0 devin=xfrm1 devout=PortA nseid=16810139 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=8 natid=0 fw_action=1 bwid=0 appid=2974 appcatid=5 hbappid=0 hbappcatid=0 dpioffload=0x3f sigoffload=0 inzone=5 outzone=1 devinindex=26 devoutindex=6 hb_src=1 hb_dst=8 flags0=0xa0000200008 flags1=0x10106800000 flagvalues=3,21,41,43,87,89,90,96,104 catid=83 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=00:0d:3a:22:87:7e src_mac=12:34:56:78:9a:bc startstamp=1653921030 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=6 tlsruleid=0 ips_nfqueue=0 sess_verdict=2 gwoff=0 cluster_node=0 current_state[0]=11434 current_state[1]=11434 vlan_id=0 inmark=0x0 brinindex=0 sessionid=464 sessionidrev=12567 session_update_rev=13 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid[0]=0 pbrid[1]=0 profileid[0]=0 profileid[1]=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 saidx[0]=0 saidx[1]=0 saidx_rev[0]=0 saidx_rev[1]=0 atomic_flags=0x0 conn_fp_id=NOT_OFFLOADED

Those values (pbrid0 and pbrid1) should be not 0. If there is 0, the SD-WAN rule is not applied. 

You can use conntrack -E |grep IP_of_device

This should give you an overview of all connections. 

LuCar Toni said:

You can use conntrack -E |grep IP_of_device

console> conntrack -E
% Error: Unknown Parameter 'conntrack'
console>

Conntrack is a advanced Shell command. 

Conntrack is a advanced Shell command. 

OK

LuCar Toni said:

pbrid0 and pbrid1

This doesn't show up. I only have those:

pbrid_dir0=4 pbrid_dir1=0

[UPDATE] proto=tcp      proto-no=6 timeout=10 state=CLOSE orig-src=10.56.166.5 orig-dst=172.30.3.100 orig-sport=64125 orig-dport=5432 reply-src=172.30.3.100 reply-dst=10.56.166.5 reply-sport=5432 reply-dport=64125 [ASSURED] mark=0x4007 id=2260928384 masterid=0 devin=LANuDMZ.2 devout=xfrm3 nseid=0 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=72 natid=0 fw_action=1 bwid=0 appid=0 appcatid=0 hbappid=0 hbappcatid=0 dpioffload=0 sigoffload=0 inzone=1 outzone=1 devinindex=42 devoutindex=46 hb_src=0 hb_dst=0 flags0=0x400a2800200000 flags1=0x10000000000 flagvalues=21,35,37,41,43,54,104 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=00:1a:8c:5f:72:00 src_mac=00:50:56:82:7c:98 startstamp=1653926568 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=46 tlsruleid=0 ips_nfqueue=0 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=13245 current_state[1]=13245 vlan_id=0 inmark=0x0 brinindex=43 sessionid=1191 sessionidrev=17158 session_update_rev=0 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=4 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED

This indicates, it will use SD-WAN rule 4. Which rule is 4 in your setup? 

This rule is not being used, as you say? 

As I sad the most things work, but not Radius or VoIP. If I create a static route it works.

Check the Conntrack for this particular traffic and verify. 

I will test this this weekend.

Hi,

I tested it this morning and you are right: pbrid_dir0=0 and pbrid_dir1=0. So no SD-WAN rule is applied?

But shouldn’t the rule I mention above apply to all traffic to the network?

Do you have a output of this VOIP traffic from Conntrack? 

Site1 to Site2

Rule:

[NEW] proto=udp      proto-no=17 timeout=30 orig-src=172.18.1.102 orig-dst=10.56.158.8 orig-sport=29443 orig-dport=29443 [UNREPLIED] reply-src=10.56.158.8 reply-dst=172.18.1.102 reply-sport=29443 reply-dport=29443 mark=0x4006 id=3776086656 masterid=2053321088 devin=LANuDMZ.1 devout=xfrm1 nseid=0 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=65 natid=0 fw_action=0 bwid=0 appid=0 appcatid=0 hbappid=0 hbappcatid=0 dpioffload=0 sigoffload=0 inzone=1 outzone=5 devinindex=633 devoutindex=45 hb_src=0 hb_dst=0 flags0=0xa0000204000 flags1=0x0 flagvalues=14,21,41,43 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=00:1a:8c:5f:72:04 src_mac=00:1a:e8:89:38:51 startstamp=1654595990 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=45 tlsruleid=0 ips_nfqueue=0 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=15908 current_state[1]=0 vlan_id=0 inmark=0x0 brinindex=0 sessionid=2647 sessionidrev=65067 session_update_rev=0 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED

Site2 to Site1

Rule:

[NEW] proto=udp      proto-no=17 timeout=30 orig-src=10.56.158.8 orig-dst=172.18.1.102 orig-sport=29443 orig-dport=29443 [UNREPLIED] reply-src=172.18.1.102 reply-dst=10.56.158.8 reply-sport=29443 reply-dport=29443 mark=0x8001 id=4239543104 masterid=1264079808 devin=LANuDMZ.2 devout=Port2 nseid=0 ips=0 sslvpnid=0 webfltid=0 appfltid=0 icapid=0 policytype=1 fwid=53 natid=0 fw_action=0 bwid=0 appid=0 appcatid=0 hbappid=0 hbappcatid=0 dpioffload=0xd sigoffload=0 inzone=1 outzone=2 devinindex=27 devoutindex=6 hb_src=0 hb_dst=0 flags0=0xa2000204008 flags1=0x800000 flagvalues=3,14,21,37,41,43,87 catid=0 user=0 luserid=0 usergp=0 hotspotuserid=0 hotspotid=0 dst_mac=c8:4f:86:01:4c:a2 src_mac=00:1a:e8:89:68:49 startstamp=1654595990 microflow[0]=INVALID microflow[1]=INVALID hostrev[0]=0 hostrev[1]=0 ipspid=0 diffserv=0 loindex=6 tlsruleid=0 ips_nfqueue=1 sess_verdict=0 gwoff=0 cluster_node=0 current_state[0]=6032 current_state[1]=0 vlan_id=0 inmark=0x0 brinindex=0 sessionid=4300 sessionidrev=43578 session_update_rev=1 dnat_done=0 upclass=0:0 dnclass=0:0 pbrid_dir0=0 pbrid_dir1=0 nhop_id[0]=65535 nhop_id[1]=65535 nhop_rev[0]=0 nhop_rev[1]=0 conn_fp_id=NOT_OFFLOADED