traceroute problem?

# traceroute ultraunix.net
traceroute to ultraunix.net (69.61.56.98), 30 hops max, 38 byte packets
traceroute: sendto: Operation not permitted
1 traceroute: wrote ultraunix.net 38 chars, ret=-1
*traceroute: sendto: Operation not permitted
traceroute: wrote ultraunix.net 38 chars, ret=-1
*traceroute: sendto: Operation not permitted
traceroute: wrote ultraunix.net 38 chars, ret=-1
*
traceroute: sendto: Operation not permitted
2 traceroute: wrote ultraunix.net 38 chars, ret=-1
*traceroute: sendto: Operation not permitted
traceroute: wrote ultraunix.net 38 chars, ret=-1
*traceroute: sendto: Operation not permitted
traceroute: wrote ultraunix.net 38 chars, ret=-1
Any idea what could be the problem? Once flused apf (apf -f) then I could perform the traceroute normally, but later on the error occurs again.

 

 

 

 

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