> On May 11, 2018, at 06:21, Denis <den...@mindall.org> wrote:
>
> Hello,
>
> I have working ikev2 tunnel between two virtual aliased subnets. But no
> traffic over IPsec tunnel from $ext_if on server machine to $ext_if on
> client machine and vice-versa. Both machines are using in production and
> firewalled by PF.
>
> ------------------------
> # cat /etc/hostname.em1
> ### server $ext_if
> dhcp
> alias 192.168.5.1
> 255.255.255.0
> ------------------------
> |
> | IPsec
> |
> ------------------------
> # cat /etc/hostname.axen0
> ### client $ext_if
> dhcp
> alias 192.168.6.1
> 255.255.255.0
> ------------------------
>
> I can ping each 'end' of IPsec virtual subnets from both side of tunnel
> (after IP assigned to both gateways by ISP's dhcp), but no traffic though.
>
> server# ping 192.168.6.1
> 64 bytes from 192.168.6.1: icmp_seq=0 ttl=255 time 1.064 ms
> ...
> clielnt# ping 192.168.5.1
> 64 bytes from 192.168.5.1: icmp_seq=0 ttl=255 time 0.785 ms
> ...
>
> The final goal is: All incoming traffic on server's $ext_if = "em1" for
> selected ports 25, 443, 465, 993 etc. must be redirected from aliased
> server's IP:192.168.5.1 though IPsec tunnel to appropriate services on
> aliased client's IP:192.168.6.1. So client can reply to incoming
> connections to remote server's via IPsec lan.
>
> No routing is needed between server's / client's 'real' private LANs.
> Because of that I've decided to use aliased virtual lans for IPsec
> tunneling. But I'm not sure about correctness of this.
>
> server# cat /etc/iked.conf
> gw_ip = "em1"
> local_lan = "192.168.5.0/24" # server side virtual subnet alias to em1 \
> which obtain an address from dhcp
> remote_lan = "192.168.6.0/24" # client virtual subnet alias to axen0 \
> which obtain an address from dhcp too.
> mode = "passive"
>
> ikev2 "pki-srv" $mode ipcomp esp \
> from $local_lan to $remote_lan \
> local $gw_ip peer any \
> srcid srv-pubkey dstid clnt-pubkey \
> tag "srv.tld.ipsec"
> tap "enc0"
>
> server# cat /etc/pf.conf
> ...
> ext_if = em1
> ipsec_if = em1
> ipsec_enc_if = enc0
> ipsec_local_lan = "192.168.5.0/24"
> ipsec_remote_lan = "192.168.6.0/24"
> ...
> queue rootq on $ext_if bandwidth 100M max 100M
> queue ipsec parent rootq bandwidth 90M min 70M max 100M
> queue ipsec_users parent rootq bandwidth 50M min 30M max 60M
> queue bulk parent rootq bandwidth 10M default
> ...
> block on $ext_if all
> block on $ipsec_enc_if all
> ...
>
> # --- IPsec
> pass in quick on $ipsec_if proto udp from any to ($ipsec_if) port \
> {isakmp, ipsec-nat-t}
> pass out quick on $ipsec_if proto udp from ($ipsec_if) to any port \
> {isakmp, ipsec-nat-t} keep state
>
> pass in quick on $ipsec_if proto esp from any to ($ipsec_if)
> pass out quick on $ipsec_if proto exp from ($ipsec_if) to any \
> keep state set queue ipsec
>
> pass out quick on $ipsec_if tagged srv.tld.ipsec set queue ipsec_users
>
> pass in quick on $ipsec_enc_if proto ipencap from any to ($ipsec_if) \
> keep state (if-bound)
> pass out quick on $ipsec_enc_if proto ipencap from ($ipsec_if) to any \
> keep state (if-bound)
>
> pass in quick on $ipsec_enc_if from $ipsec_remote_lan to \
> $ipsec_local_lan keep state (if-bound)
> pass out quick on $ipsec_enc_if from $ipsec_local_lan to \
> $ipsec_remote_lan keep state (if-bound)
> ...
>
>
> client# cat /etc/iked.conf
> gw_ip = "axen0"
> local_lan = "192.168.6.0/24" # clinet virtual subnet alias to axen0 \
> which obtain an address from dhcp
> remote_lan = "192.168.5.0/24" #server side virtual subnet alias to em0 \
> which obtain an address from dhcp
> srv_ip = "a.b.c.d" #server's IP each time is the same from ISP's dhcp
> mode = "active"
>
> ikev2 "pki-clnt" $mode ipcomp esp \
> from $local_lan to $remote_lan \
> local $gw_ip to $srv_ip \
> crcid clnt-pubkey dstid srv-pubkey \
> tag "clnt.tld.ipsec"
> tap "em0"
>
> client# cat /etc/pf.conf
> ...
> ext_if = axen0
> ipsec_if = axen0
> ipsec_enc_if = enc0
> ipsec_local_lan = "192.168.6.0/24"
> ipsec_remote_lan = "192.168.5.0/24"
> ...
> queue rootq on $ext_if bandwidth 100M max 100M
> queue ipsec parent rootq bandwidth 90M min 70M max 100M
> queue ipsec_users parent rootq bandwidth 50M min 30M max 60M
> queue bulk parent rootq bandwidth 10M default
> ...
> block on $ext_if all
> block on $ipsec_enc_if all
> ...
>
> # --- IPsec
> pass in quick on $ipsec_if proto udp from any to ($ipsec_if) port \
> {isakmp, ipsec-nat-t}
> pass out quick on $ipsec_if proto udp from ($ipsec_if) to any port \
> {isakmp, ipsec-nat-t} keep state
>
> pass in quick on $ipsec_if proto esp from any to ($ipsec_if)
> pass out quick on $ipsec_if proto exp from ($ipsec_if) to any \
> keep state set queue ipsec
>
> pass out quick on $ipsec_if tagged clnt.tld.ipsec set queue ipsec_users
>
> pass in quick on $ipsec_enc_if proto ipencap from any to ($ipsec_if) \
> keep state (if-bound)
> pass out quick on $ipsec_enc_if proto ipencap from ($ipsec_if) to any \
> keep state (if-bound)
>
> pass in quick on $ipsec_enc_if from $ipsec_remote_lan to \
> $ipsec_local_lan keep state (if-bound)
> pass out quick on $ipsec_enc_if from $ipsec_local_lan to \
> $ipsec_remote_lan keep state (if-bound)
> ...
>
> I think it can be something wrong in PF configuration or
> missed/unfinished touching IPsec traffic filtering.
>
> Please advice.
Do you not need a “proto ipencap” on the last two pass-rules that permit
traffic between your LAN:s?
// Johan
