I have added to /etc/pf.conf:
$ipsec_if = "axen0"
$ipsec_remote_lan = "192.168.5.0/24"
pass out quick on $ipsec_if proto tcp from lo0 to $ipsec_remote_lan
but outgoing traffic from client's lo0 is blocked anyway:
rule 14/(match) block out on axen0: 127.0.0.1:port > 192.168.5.1:port: S
> 776927979:776927979(0) ack 896868769 win 16384 <mss...
Denis
On 5/14/2018 2:17 PM, Denis wrote:
> Incoming connections to client's IP (192.168.6.1) is established and
> seems redirected to lo0:port, but outgoing connection from client's lo0
> to a server's IP (192.168.5.1) is blocked according to
>
> # tcpdump -en -i pflog0 output:
>
> ...
> rule 14/(match) block out on axen0: 127.0.0.1:port > 192.168.5.1:port: S
> 776927979:776927979(0) ack 896868769 win 16384 <mss...
> ...
>
> Do I need to add a NAT rule to have reply passed to server's source IP
> (192.168.5.1) or what?
>
> Thanks.
>
> Denis
>
>
> On 5/13/2018 7:12 PM, Johan Hattne wrote:
>> Nah, sorry, I misread your rules—on second look, I don’t see what’s gone
>> wrong. What about logging blocked packets
>>
>> block log (all, to pflog0)
>>
>> in pf.conf and dumping it
>>
>> # tcpdump -en -i pflog0
>>
>> while doing what you expect should work?
>>
>> // Johan
>>
>>> On May 13, 2018, at 02:15, Denis <den...@mindall.org> wrote:
>>>
>>> Johan,
>>>
>>> Do I have to remove these two rules or modify them by removing ipencap?
>>>
>>> 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)
>>>
>>> On 5/12/2018 10:11 AM, Johan Hattne wrote:
>>>>
>>>>> 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
>>>>
>>>
>>
>
