Does your ISP implement authoritative DNS?
Do you suspect a UDP issue?
Is a managed (switch) involved? Has duplex ever been an issue?
Regards
Patrick
> On Aug 18, 2019, at 1:03 PM, Radek <r...@int.pl> wrote:
>
> Hello,
>
> I have two testing gateways (6.5/i386) with site-to-side VPN between its LANs
> (OpenIKED).
> Both gws are fully syspatched, have public IPs and the same iked/pf
> configuration.
>
> Unfortunately, the network traffic over the VPN tunnel stalls few times a
> day.
>
> On the one side I use a script to monitor VPN tunnel with ping, it restarts
> iked and emails me if there is no ping over the VPN tunnel.
> Date: Sat, 17 Aug 2019 22:10:30 +0200 (CEST)
> Date: Sun, 18 Aug 2019 06:00:20 +0200 (CEST)
> Date: Sun, 18 Aug 2019 11:09:00 +0200 (CEST)
> Date: Sun, 18 Aug 2019 19:03:02 +0200 (CEST)
>
>
> In 6.3/i386 I have the same problem, but more frequently.
> Date: Sat, 17 Aug 2019 23:03:56 +0200 (CEST)
> Date: Sun, 18 Aug 2019 01:37:50 +0200 (CEST)
> Date: Sun, 18 Aug 2019 04:12:31 +0200 (CEST)
> Date: Sun, 18 Aug 2019 06:46:25 +0200 (CEST)
> Date: Sun, 18 Aug 2019 09:20:22 +0200 (CEST)
> Date: Sun, 18 Aug 2019 11:59:08 +0200 (CEST)
> Date: Sun, 18 Aug 2019 14:34:38 +0200 (CEST)
> Date: Sun, 18 Aug 2019 17:12:57 +0200 (CEST)
> Date: Sun, 18 Aug 2019 19:47:16 +0200 (CEST)
>
> Do I have any bugs/deficiencies in my configs, missed something?
> Is there any way to make it work uninterruptedly?
> I would be very greatful if you could help me with this case.
>
> $cat /etc/hostname.enc0
> up
>
> $cat /etc/hostname.vr3
> inet 10.0.17.254 255.255.255.0 NONE description "LAN17"
> group trust
>
> $cat /etc/iked.conf
> local_gw_RAC17 = "10.0.17.254" # lan_RAC
> local_lan_RAC17 = "10.0.17.0/24"
> remote_gw_MON = "1.2.3.5" # fw_MON
> remote_lan_MON = "172.16.1.0/24"
> ikev2 quick active esp \
> from $local_gw_RAC17 to $remote_gw_MON \
> from $local_lan_RAC17 to $remote_lan_MON peer $remote_gw_MON \
> childsa enc chacha20-poly1305 \
> psk "psk"
>
> $cat /etc/pf.conf
> # RAC-fwTEST
> ext_if = "vr0"
> lan_rac_if = "vr3" # vr3 -
> lan_rac_local = $lan_rac_if:network # 10.0.17.0/24
> backup_if = "vr2" # vr2 - lewy port
> backup_local = $backup_if:network # 10.0.117/24
>
> bud = "1.2.3.0/25"
> rdk_wy = "1.2.3.4"
> rdk_mon = "1.2.3.5"
> panac_krz = "1.2.3.6"
> panac_rac = "1.2.3.7"
>
> set fingerprints "/dev/null"
> set skip on { lo, enc0 }
> set block-policy drop
> set optimization normal
> set ruleset-optimization basic
>
> antispoof quick for {lo0, $lan_rac_if, $backup_if }
>
> match out log on $ext_if from { $lan_rac_local, $backup_local } nat-to
> $ext_if set prio (3, 7)
>
> block all
>
> match in all scrub (no-df random-id)
> match out all scrub (no-df random-id)
> pass out on egress keep state
>
> pass from { 10.0.201.0/24, $lan_rac_local, $backup_local } to any set prio
> (3, 7) keep state
>
> ssh_port = "1071"
> table <ssh_trust> const { $bud, $rdk_wy, $rdk_mon, $panac_krz, $panac_rac,
> 10.0.2.0/24, 10.0.15.0/24, 10.0.100.0/24 }
> table <bruteforce> persist counters
> block from <bruteforce>
> pass in log quick inet proto tcp from <ssh_trust> to $ext_if port $ssh_port
> flags S/SA \
> set prio (7, 7) keep state \
> (max-src-conn 15, max-src-conn-rate 2/10, overload <bruteforce> flush
> global)
>
> icmp_types = "{ echoreq, unreach }"
> pass inet proto icmp all icmp-type $icmp_types \
> set prio (7, 7) keep state
>
> table <vpn_peers> const { $rdk_mon, $panac_rac, $panac_krz }
> pass out quick on egress proto esp from (egress:0) to <vpn_peers>
> set prio (6, 7) keep state
> pass out quick on egress proto udp from (egress:0) to <vpn_peers> port {500,
> 4500} set prio (6, 7) keep state
> pass in quick on egress proto esp from <vpn_peers> to (egress:0)
> set prio (6, 7) keep state
> pass in quick on egress proto udp from <vpn_peers> to (egress:0) port {500,
> 4500} set prio (6, 7) keep state
> pass out quick on trust received-on enc0 set prio (6, 7) keep state
>
> pass in on egress proto udp from any to (egress:0) port {isakmp,ipsec-nat-t}
> set prio (6,7) keep state
> pass in on egress proto {ah,esp} set prio (6,7) keep state
>
> # By default, do not permit remote connections to X11
> block return in on ! lo0 proto tcp to port 6000:6010
>
> $cat iked_monitor.sh
> #!/bin/sh
> while true
> do
> vpn=`ping -c 3 -w 1 -I 10.0.17.254 172.16.1.254 | grep packets | awk -F " "
> '{print $4}'`
>
> if [ "${vpn}" -eq 0 ] ; then
> mon=`ping -c 3 -w 1 the_other_side_WAN_IP | grep packets | awk -F " " '{print
> $4}'`
> wan=`ping -c 3 -w 1 8.8.8.8 | grep packets | awk -F " " '{print $4}'`
>
> if [ "${mon}" -gt 0 ] && [ "${wan}" -gt 0 ] ; then
> echo vpn: ${vpn}, mon: ${mon}, wan: ${wan} | mail -s "no ping through
> VPN RACTEST-MON! restartng iked!" em...@example.com
> rcctl restart iked
> fi
> fi
> sleep 32
> done
>
>
> --
> Radek
>
