We have a tunnel with pre-shared keys between one office and another. Data
flows back and forth fine. (we create static routes on the machines that
talk back and forth over this tunnel)

Running OpenBSD 3.2 -stable

Looking back over my logs it seems that I get a lot of these error messages:

gif_output: recursively called too many times

We have the following configs:

bridgename.bridge0: (Thisis our transparent bridge for firewall)
add xl0 add xl1 up

bridgename.bridge1:
add gif1 add xl2 up
!ifconfig gif1 giftunnel 12.5.18.227 63.141.18.155
!ifconfig gif1 up
!ifconfig enc0 up

!/sbin/ipsecadm new esp -src 12.5.18.227 -dst 63.141.18.155 -forcetunnel
-spi 1000 -enc 3des -auth sha1 -keyfile /etc/vpn/enc_key -authkeyfile
/etc/vpn/auth_key
!/sbin/ipsecadm new esp -src 63.141.18.155 -dst 12.5.18.227 -forcetunnel
-spi 1001 -enc 3des -auth sha1 -keyfile /etc/vpn/enc_key -authkeyfile
/etc/vpn/auth_key

!ipsecadm flow -out -require -proto esp -src 12.5.18.227 -dst 63.141.18.155
-addr 12.5.16.112/28 63.141.18.128/26
!ipsecadm flow -in -require -proto esp -src 12.5.18.227 -dst 63.141.18.155
-addr 63.141.18.128/26 12.5.16.112/28

Our PF.conf does have the appropriate holes opened for the tunnel as well
(all filtering done on $ext interface):

pass in quick on $ext from $VPNB to $VPNA
pass out quick on $ext from $VPNA to $VPNB
pass in quick on enc0 from any to any
pass out quick on enc0 from any to any
pass in quick on bridge1 from any to any
pass out quick on bridge1 from any to any
pass in quick on gif1 from any to any
pass out quick on gif1 from any to any

Any clues that can help me.....tried googling for answers but didn't find
any.


--David Chubb


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