logger(DEBUG_TRAFFIC, LOG_INFO, "Fragmenting packet of %d bytes to %s (%s)", packet->len, dest->name, dest->hostname);
offset = DATA(packet) + ether_size + ip_size;
- maxlen = (dest->mtu - ether_size - ip_size) & ~0x7;
+ maxlen = (MAX(dest->mtu, 590) - ether_size - ip_size) & ~0x7;
ip_off = ntohs(ip.ip_off);
origf = ip_off & ~IP_OFFMASK;
ip_off &= IP_OFFMASK;