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I can't connect to VPN until flushing iptables with iptables -F. pppd fails to connect with error message LCP: timeout sending Config-Requests. Which rule is causing this error?

The result of iptables -L -v -n is:

Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
   16  1334 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
    0     0 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0           
   13   972 INPUT_direct  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
   13   972 INPUT_ZONES_SOURCE  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
   13   972 INPUT_ZONES  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            0.0.0.0/0           
   13   972 DROP       all  --  *      *       0.0.0.0/0            0.0.0.0/0            ctstate INVALID
    0     0 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibited

Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0            ctstate RELATED,ESTABLISHED
    0     0 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0           
    0     0 FORWARD_direct  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FORWARD_IN_ZONES_SOURCE  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FORWARD_IN_ZONES  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FORWARD_OUT_ZONES_SOURCE  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FORWARD_OUT_ZONES  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 DROP       all  --  *      *       0.0.0.0/0            0.0.0.0/0            ctstate INVALID
    0     0 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0            reject-with icmp-host-prohibited

Chain OUTPUT (policy ACCEPT 29 packets, 2783 bytes)
 pkts bytes target     prot opt in     out     source               destination         
   29  2783 OUTPUT_direct  all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain FORWARD_IN_ZONES (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 FWDI_public  all  --  wlp18s0b1 *       0.0.0.0/0            0.0.0.0/0           [goto] 
    0     0 FWDI_public  all  --  *      *       0.0.0.0/0            0.0.0.0/0           [goto] 

Chain FORWARD_IN_ZONES_SOURCE (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD_OUT_ZONES (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 FWDO_public  all  --  *      wlp18s0b1  0.0.0.0/0            0.0.0.0/0           [goto] 
    0     0 FWDO_public  all  --  *      *       0.0.0.0/0            0.0.0.0/0           [goto] 

Chain FORWARD_OUT_ZONES_SOURCE (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FORWARD_direct (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FWDI_public (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 FWDI_public_log  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FWDI_public_deny  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FWDI_public_allow  all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain FWDI_public_allow (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FWDI_public_deny (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FWDI_public_log (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FWDO_public (2 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 FWDO_public_log  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FWDO_public_deny  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
    0     0 FWDO_public_allow  all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain FWDO_public_allow (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FWDO_public_deny (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain FWDO_public_log (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain INPUT_ZONES (1 references)
 pkts bytes target     prot opt in     out     source               destination         
   13   972 IN_public  all  --  wlp18s0b1 *       0.0.0.0/0            0.0.0.0/0           [goto] 
    0     0 IN_public  all  --  *      *       0.0.0.0/0            0.0.0.0/0           [goto] 

Chain INPUT_ZONES_SOURCE (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain INPUT_direct (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain IN_public (2 references)
 pkts bytes target     prot opt in     out     source               destination         
   13   972 IN_public_log  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
   13   972 IN_public_deny  all  --  *      *       0.0.0.0/0            0.0.0.0/0           
   13   972 IN_public_allow  all  --  *      *       0.0.0.0/0            0.0.0.0/0           

Chain IN_public_allow (1 references)
 pkts bytes target     prot opt in     out     source               destination         
    0     0 ACCEPT     udp  --  *      *       0.0.0.0/0            224.0.0.251          udp dpt:5353 ctstate NEW
    0     0 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0            tcp dpt:22 ctstate NEW

Chain IN_public_deny (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain IN_public_log (1 references)
 pkts bytes target     prot opt in     out     source               destination         

Chain OUTPUT_direct (1 references)
 pkts bytes target     prot opt in     out     source               destination 
1
  • I think it's 13 972 DROP all -- * * 0.0.0.0/0 0.0.0.0/0 ctstate INVALID – webknjaz Mar 15 '15 at 12:25

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