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
>
