ping 127.0.0.1 error sendto: can't assign requested address

gbruyneel

Hello,
I have a netgate 3100 with the latest pfsense version (22.05). I have issue with the loopback interface. When I ping 127.0.0.1 or localhost I always get the error sendto:can't assign the requested address. The lo0 interface seems to be up and running:

ifconfig -a
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
        options=680003<RXCSUM,TXCSUM,LINKSTATE,RXCSUM_IPV6,TXCSUM_IPV6>
        inet6 ::1 prefixlen 128
        inet6 fe80::1%lo0 prefixlen 64 scopeid 0xa
        inet 127.0.0.1 netmask 0xff000000
        group: lo
        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

But ping6 is working :

ping6 localhost
PING6 (56=40+8+8 bytes) ::1 --> ::1
16 bytes from ::1, icmp_seq=0 hlim=64 time=0.330 ms
...
--- localhost ping6 statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss

Then all services using the loopback IPv4 address (like unbound, freeradius etc...) are not working/responding.

The only package I have installed are :
bind 9.16_17
openvpn-client-export 1.6_4
Shellcmd 1.0.5_2
System_Patches 2.0.6

Can someone help me ?

Thanks

gbruyneel

hello again,

more strange thing: When I do :

ifconfig lo0 down
ifconfig lo0 up

Then I get my ping back on 127.0.0.1 and localhost for about 40 loop and crash again with sendto error.

and when i reset le lo0 again it comes ok and then crash etc....

Is it a hardware issue ?

Best regards

stephenw10

Do you have some odd route?

That error implies it's trying to source the ping from something unexpected.

Steve

gbruyneel

@stephenw10
No routes seems to be OK:

netstat -nr
Routing tables

Internet:
Destination        Gateway            Flags     Netif Expire
default            XX.XX.XX.XX        UGS     mvneta2
10.10.100.0/24     link#2             U       mvneta1
10.10.100.1        link#2             UHS         lo0
XX.XX.XX.XX/26     link#8             U       mvneta2
XX.XX.XX.XY.       link#8             UHS         lo0
109.0.66.10        45:c2:8c:ae:a5:d7  UHS     mvneta2
109.0.66.20        45:c2:8c:ae:a5:d7  UHS     mvneta2
127.0.0.1          link#10            UH          lo0
192.168.50.0/24    link#1             U       mvneta0
192.168.50.10      link#1             UHS         lo0

I have replace my WAN IP with XX.XX.XX.XX
everything seems to be ok.

stephenw10

Hmm, what if you set a source IP like:

[22.05-RELEASE][admin@3100.stevew.lan]/root: ping -S 192.168.18.1 localhost
PING localhost (127.0.0.1) from 192.168.18.1: 56 data bytes
64 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.278 ms
64 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.089 ms
64 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.085 ms
^C
--- localhost ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.085/0.150/0.278/0.090 ms