Today, I detected that my AYIYA tunnel T44077 to DEDUS01 stopped working. I checked everything on my side, tried restarting AICCU several times, but to no avail. Even pinging the gateway side of my tunnel gives 100% packet loss. Finally, tcpdump revealed that dedus01.sixxs.net:5072 is unreachable: # tcpdump -ni eth1 host dedus01.sixxs.net tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on eth1, link-type EN10MB (Ethernet), capture size 65535 bytes 23:04:51.089938 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 44 23:04:51.119367 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 80 23:05:44.879314 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:05:44.908506 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:05:47.879071 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:05:47.908071 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:05:51.090239 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 44 23:05:51.120049 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 80 23:05:53.879082 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:05:53.907713 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:05.880115 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:05.913333 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:08.879081 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:08.907994 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:14.879128 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:14.907876 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:26.880150 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:26.909195 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:29.879078 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:29.908553 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:35.879152 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:35.910331 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:47.880146 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:47.912166 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 23:06:50.879131 IP 192.168.0.2.37761 > 91.184.37.98.5072: UDP, length 124 23:06:50.921101 IP 91.184.37.98 > 192.168.0.2: ICMP 91.184.37.98 udp port 5072 unreachable, length 160 Thanks in advance